Thanks so much for watching, Paul! And if you're a BoatUS Member, you may be interested in an upcoming article in the June/July 2021 issue on the latest technology in small outboards.
You're so kind, Dal. We're all doing well though still stuck at home. Hope you are well, too! As always, thanks for watching and commenting. You always make our day!
Thanks for watching, Darren! You're correct--though horsepower needs to be matched to the individual boat. It's dangerous to get a motor that exceeds weight or power recommendations from the manufacturer.
Thanks for the info. I have a 4 meters aluminium fishing boat. I don't want to go the open ocean. Just rivers and lakes and if I go in the open ocean not really far. I want to know how big motor I should buy? Is 40HP should be enough? Thanks
Hi Syed and thanks for your question. If possible, you want to check with the boat manufacturer to find out what the largest outboard is that's recommended. You don't want to exceed that, or it can be dangerous. With the info you gave, however, 40 hp might be a bit too much for this boat, especially if it's lighter weight. But it's hard to give you an exact answer without being there in person and having more info. You might also want to read some of the other questions and answers here as others have asked similar questions. It may help you narrow down what you need.
That's awesome, David. Glad you've have good luck with it. If you're a BoatUS Member, you might be interested in a story we have in the upcoming issue of BoatUS Magazine on the latest technologies in small outboards. We talk a little about the Tohatsu propane outboard in it. The technological advances in smaller motors are mind-boggling!
Great video! I'm having trouble finding information about my old boat. I can't find a HIN number. It's a Cadillac 13.5 foot aluminum row bow with a 48" wide by 15-16" transom. It's a three seater and is 54" wide at the widest part of the hull. I'm looking to buy a 9.9 HP Merc. Is that to big? Too small? and what should the length of the shaft be? I appreciate your time and input.
Wow! What a cool boat, Start! That's a new one to us. Measure from the top center of the transom to the lowest point on the transom, and then get the shortest shaft length that matches or exceeds that measurement. You have to be exact -- you mention it's "15" or 16" and if it's 15" a 15" shaft motor will be fine, but if it's 16" you'll need a 20" shaft. As for horsepower, without knowing the manufacturer's specifications it's a guessing game, and we can't make any guarantees. That said, a 9.9 might be a bit much. An average modern 12' Jon boat is rated to 6 hp. That doesn't mean your boat can't handle more, but that's a judgment we can't make from afar. If you haven't done so already, check out the website www.wagemakerwolverineboats.com/cadillac_aluminum_boats. There's a plethora of info there on the history. You might try reaching out to Brian for more info. And the reason you can't find a HIN is because you boat predates them. They weren't required until Nov. 1, 1972. Hope this helps and have fun with it!
Hi there. I have a 4.3 tinny and want to use it in the bay. What size motor do you recommend for that? I have a motor which has an extra long shaft. My boat transom is 20 inches. And that motor is 24 inches and that is 40hp. Thanks
Thanks for the question, syednaqvi1804. Unfortunately that's a hard question to answer without seeing your boat in person and getting more info. Generally, a boat with a 20" transom would take a long shaft (20") motor. As far as recommended hp -- it really depends on manufacturer recommendations and how much weight you're trying to push around. Doing some research, it seems that folks with your type/size of boat went with 30 or 40. Some folks found that the 30 was enough. Others felt they needed the 40. Bottom line: You want enough power without being overpowered, which is dangerous. If you can, I'd consult your boat manufacturer or talk to the company making the motor you're considering.
You say you should measure your transom to know what shaft length you need, but what is the formula to determine shaft length after you have transom depth?? Or is there a table to determine that?
Thanks for the question, Uvickerns. Outboards are commonly available in three shaft lengths: 15, 20 and 25 inches, with 20 inches being the standard and the most common size. As a general rule, the cavitation plate (the flat plate that forms part of the outboard leg directly above the propeller) should be level with the bottom of the transom. For larger, heavier engines that are rigged by a dealer, they will be very familiar with which size engine to use, and you should be guided by them. But of course, there are exceptions to every rule, and a long shaft could be used on a boat that requires a standard shaft but the boat will be slower by a knot or two due to the increased drag. Also, there is that much more potential for the prop to hit a submerged object as it hangs lower. My best advice would be to seek the advice of a local dealer who will have extensive knowledge and can ensure that you are using the correct shaft length.
Can you give us more information, sasha? From a very quick search, the 6h5 is a tilt/trim motor and the 6f5 is a starter motor, but without more information, we cannot give you an accurate answer.
I currently have a 25hp on a 14’x5’ with a 20” transom boat, the motor has electric start and trim, but I think it might be too heavy(180lbs plus or minus). Do you recommend a 20hp with same futures at about 124 lbs or 30hp at 131 lbs manual. The boat is rated at 920 lbs total and rated at 25. Any advice?
Thanks for the question, Yoisdel. If the boat is rated for 25, we wouldn't suggest putting a 30-hp motor on it, period. And note that 20 horses is usually plenty for a 14-footer. Also, remember that, depending on the brand, a 25 could be the same weight as that 20 you're considering. A Yamaha F20 and F25, for example, have the same powerhead and are both 126 pounds. In any case, it's wise to consider the difference between weight and power between the 20 and 25 since a 50-pound jump (which is about what you'll see with most other manufacturers) will shrink the performance difference. Either way, it's best to remove the 30-hp engine from the conversation. Hope this is helpful!
Hi Eddie. It really comes down to the weight of the boat and maximum recommended HP by the manufacturer. Without more information, it's hard to say for sure. If possible, double check manufacturer specs. It could be dangerous if it's overpowered.
Excellent information, I measure the transom is 23” need long or xtra long shaft ? Is an old bass boat Monark Macfast 5. I would to know what do you suggest for hp? Thanks so much
Thanks for the question, Jairo. I reached out to Lenny who had the same issue with one of his boats. Occasionally when dealing with some very old boats you'll encounter transoms such as this, which weren't built to today's more universal standards. Putting a 20" shaft motor won't work without modification; as soon as the boat begins to plane, the prop will be starved for water. You can cut the transom down in some cases, but you have to make sure there's room for turning the motor without any of the rigging hanging up or hitting the edges. You could also try a jackplate, but the results can't be predicted ahead of time - it might work, it might not. And to get the motor at the right height, you may be unable to tilt it or align the steering and/or rigging in such a way that it doesn't have issues rubbing against the transom. You may also find that the motor is too low to the water. The safest bet is to go with the longer shaft. Regarding the horsepower question, we're not very familiar with these boats as it looks like the model was only manufactured about two years, but from what we've seen online, the max recommended is 85 hp. Others that have this model seem to be running a 70 hp. That said, because overpowering can be extremely dangerous, we strongly recommend consulting someone who might be able to confirm this info. Or do some online searches to see what others are running. Might help answer your question on the shaft length, too.
i have a 14 ft v hull with a 20 hp mercury 20" shaft. My transom is 15 inches, however the previous owner installed a mounting plate that raises the motor another 4-5 inches. is the long shaft okay?
Thanks for the Q, Hunter. Chances are yes, however, once you modify a boat's transom and raise up or cut down the motor's mounting position from what the manufacturer designed and built, all bets are off. It's a good possibility the previous owner did this to accommodate a specific outboard but we have no way of knowing if it worked or not, and how well. The only way you can be sure of the outcome is to put the motor on, give it a shot, and see how it runs.
Thanks for the question, ASMR. Unfortunately we're not in a position to give you a specific answer to your question due to not knowing what kind of boat, where you boat, etc. For a boat that size, though, you might consider one of the many electric options now available. Lenny was a hold-out on electric for a long time, finally took the plunge, and now is a huge proponent of them. (He's got an article about this in an upcoming issue of BoatUS Magazine.) When I asked about range issues, he said he hasn't had any. The one thing we can tell you is not to exceed the maximum size motor recommended by the boat manufacturer. It could be dangerous.
Thanks for the question, Sam. 10 hp sounds about right, but you should always check the manufacturer's specs and Max power rating to be sure you don't overpower a boat when putting on a new outboard. Hope this helps!
Absolutely, WestCoast. Doing so will likely require re-rigging, but if your current outboard is outdated, you've probably got outdated steering and throttle-control systems, too, so they'd need to be changed out anyway. Hope this helps, and thanks for watching!
Thanks for the question, Behrang. You should always follow the recommendations as contained in your owner’s manual for your particular motor as recommendations vary. Also, it will make a difference if your motor is a four or two stroke. Often, two-stoke motors may not need as high an octane rating as a four stroke.
Thanks for the question, Gener. The critical dimension for shaft length is transom height. Measuring from the top of the transom to the hull bottom at the center of the transom, match the height of the transom to the published shaft length for the outboard (IE if it's 15 inches, a 15-inch shaft length is appropriate). Most outboards are available in 15, 20, 25, or 30 inch shaft lengths, and most boats are built to ideally match one of these lengths. As far as choosing horsepower goes, it's a matter of personal preference up to the maximum horsepower rating established by the manufacturer. Weight is a critical factor, as some boats of the size you mention, such as a light aluminum jon boat, can plane out and run just fine with as little as 20 horsepower. But a heavier fiberglass center-console of this size will more likely need 40 or 50 horsepower to produce satisfactory performance. Hope this helps, and thanks for watching!
Thanks for the question, James. For a boat that small, you don't need more than a couple horsepower. In fact, you might want to consider one of the new electric outboard options to avoid the gas issue altogether. 1- to 3-hp models from the lines of ePropulsion, Torqeedo, and others have self-contained, rechargeable batteries with significant range. Before you commit to one, check the capacity plate on your dinghy, which lists the max hp (and max weight capacity). It will be located on or near the transom.
Hey Michael. The answer to that question is debatable. However, 5-horse outboards are much simpler than larger motors and most are very reliable. The one other thing we'd note is that electric outboards are a new option in this size range which are well worth considering. Though they're more expensive and range takes a hit, the new crop of electrics are a pleasure to run with zero noise, exhaust, or vibrations, starting issues, etc. Thanks for watching and for your question!
My Macgregor 26D has a 20" transom measurement and the old outboard was a long shaft 20". Guys online are saying get the extra-long shaft; some say for rough seas. What is the downside in performance for a longer shaft than measured as needed?
Thanks for the question, Martin. Having a longer shaft increases drag, which reduces speed and efficiency. Since the MacGregor 26 is a planing boat the difference could be significant and generally speaking the best move is to stick with the manufacturer's recommendation, so if the old one worked fine, we'd say it's probably best to stick with the 20" shaft. If you noticed the prop gulping air in rough seas, however, a longer shaft would likely resolve that issue. Thanks for watching!
Thanks for the question, Ryan. Are you sure you have a 17" transom? The online specs say it's 19", but perhaps older models had different transom heights? We always recommend going with the manufacturer recommendations, which should be fairly easy to get with a quick call or email to Tracker. In case it is truly 17": Occasionally when dealing with some very old boats you'll encounter odd transom heights that weren't built to today's more universal standards. Using a 15" shaft motor won't work without modification. As soon as the boat begins to plane, the prop will be starved for water. You can cut the transom down in some cases, but you have to make sure there's room for turning the motor without any of the rigging hanging up or hitting the edges. You could also try a jackplate, but the results can't be predicted ahead of time - it might work, it might not. And to get the motor at the right height, you may be unable to tilt it or align the steering and/or rigging in such a way that it doesn't have issues rubbing against the transom. You may also find that the motor is too low to the water. Without further input, the safest bet is probably to go with the 20" shaft. Hope Tracker's customer service folks can give you a more definite answer though.
@@boatus yes, it's 16 3/4 inches.... If you count the drain tube sticking down its 17 1/4. I have a long shaft mercury 20hp on the way. I'm planning on getting the on the fly jackplate to go along with it. Thank you
@@catfishandwhitetails Fingers crossed that it works out for you. Those odd transom heights can really be tough. Here's hoping for no issues and many years of problem-free boating!
Hoping you might know. I am looking to buy a 15hp Honda outboard for my brother as a surprise. I know he has a 13 foot Valco aluminum boat and figure a 15" shaft is the right fit. Like I said this is a surprise so I don't want to call him for measurements. Any suggestions? Appreciate any help.
What an awesome gift, replus! Unfortunately we would be doing you a disservice by trying to guess this without being there in person. Because you aren't able to get the measurement directly, I'd try to find the specs online, though it looks like this may be an older boat so that may be difficult. Also, you would be assuming the transom is original and hasn't been modified. (I'm seeing some ads that mention the transom has been built up.) You might want to look for a Valco group on Facebook or look online for an active forum with Valco owners and ask for advice there. I wish we could be more helpful, but we certainly don't want to steer you wrong. Hope your brother loves the outboard, and here's to having fun on the water!
Hey, JRF. We're not 100% sure what you're asking here. Could you clarify? It's hard (if not impossible) to diagnose issues remotely. You might want to consider consulting with a local dealer or other professional to advise you.
Gotcha! That's helpful. There are a number of fishing boats out there with 20" transom rises to match your engine. That said, without knowing where you are located, where you are fishing, and what kind of fishing you plan to do, it's hard to narrow down the options, especially when it comes to hull shape -- deep V, semi-V, flat, multihull. You're probably going to need to stay in the 12-14 foot range for that size outboard though: jon boats, skiffs, pontoons. Take a look at Lund. It offers a variety of boat types, and the new ones are sold without engines. Several models have a 20" transom height. But there are other brands out there. Try searching "20" transom height fishing boat" in a search engine. You might turn up some other options. Hope this helps.
Thanks, it was very helpful. I know that it's not common to talk to a specific brand type in the youtube for you guys but is possible to talk about that and say which brand is better in terms of quality and performance. Actually, I have stocked between Honda, Yamaha, and Suzuki but some people believe that mercury is better in terms of maintenance cost. Or if it's possible tell us some hints about choosing better brands.
Thanks for watching, Yasser. I wish it were that simple. Unfortunately there are too many variables to talk specific brands. Some folks have very specific preferences for whatever reason (like trucks or cameras). Some stick with a brand they've always used. Some go by price, features, or performance. It really comes down to your individual needs. If you narrow down your options, you can do research on any issues, find customer feedback, talk to a dealer/mechanic, or join a Facebook group or board to get feedback from others with experience. The best thing you can do is research, research, research and make the best decision for you based on the info you have available. Good luck!
Bought a 16ft wide bottom Jon Boat. Has an 25yr old 6hp Johnson. The motor doesnt run from sitting too long. Should I rebuild Johnson motor or buy a newer 10hp motor? The boat will be used on small river with little current.
Thanks for the question, VA-115. It’s hard to give specific advice without seeing the motor in person. There could be lots of reasons that the present motor does not run. These could include stuck rings, stuck valves, gummed up carb, poor high-tension lead and so on. What I can tell you that it can most likely be rebuilt fairly easily as this is such a small motor. It would be a shame to discard the engine if the repair is likely to be something minor. Why not have a go at working on the engine yourself? I am sure that you can find a workshop manual online, parts should still be available and even if you are unable to get the engine running you will have lost very little but you will have learned something about the interior workings of a small outboard. I personally was faced with a similar situation after a small engine that I owned was dropped into the sea. I was able to fish it out again and after a few hours work and some spares was able to get the engine up and running and I still use it to this day.
@@boatus thank ypu greatly for the reply. I am mechanically inclinded and will give a go at the 1982 Johnson 6hp motor. Thanks for giving me a direction to go. Was so undecided.
A 16’ jon on a river I wouldn’t go less than 20hp. Especially if you’re going to have a few people and gear in the boat. But then again I’m used to the Missouri River where we ran a evinrude 48spl on a 17’ semi- V jon and it did great in the current with 4 people and fishing gear, cooler, etc. lot of friends are running 25- 40hp surface drives now as we duck hunt with the boats as well.
Thanks for the question, Bastian. Unfortunately we can't give you a yes/no on that as we're not in the business of testing engines. It sounds as if you're already doing your homework, which is what we always recommend. I don't think this is the first model year for that outboard, so you may be able to research common problems online. In general though, a lot of people I've talked to have said great things about Suzuki outboards. But like anything (Ford vs Chevy trucks, Nikon vs Canon cameras, etc.), people are going to have strong opinions about brands. Don't get too caught up in that--do your own research and determine whether it's right FOR YOU. Good luck!
Im planning a plywood flat bottom (a jon boat build) 48 Inches wide with the sides at a 22 degree offset. The intended transom depth is 24 inches. overall length of 14ft. Im hoping to build it with 1/4 inch Plywood And sheath with fiberglass ... My question is how would i determine the horse power needs For such a boat
Thanks for the question, georgia. You do not say whether you are making a boat to your own design or if you are following a professionally designed plan. If the latter then the maximum designed power should be marked on the plan, and you should adhere to this. If this is to your own design then the answer is much harder. The required power depends on so many factors: the weight of the boat, how many crew you intend to take out, the width of the transom, how strongly the boat is built, and so forth. I suspect that this is boat to your own design, as you say that you will be building this with quarter inch plywood, which may well prove too light and not strong enough for the sides of the boat let alone the bottom, even if sheathed in fiberglass. Unless you know exactly what you are doing, I would get a naval architect to look over your plans and give you some guidance and recommendations with regard to material thickness, (often called scantlings in design parlance), and the maximum horsepower.
@@boatus Thank you so much for taking time to answer. Yes the boat is going to be my own design. it isnt going to be any different from a factory jon/john Boat. Aside from the fact that the transom depth will 24 inches And all plywood. During the time ive been playing With this idea in my head the strength of 1/4 in plywood comes to mind for me as well. Id only thought of 1/4 inch plywood For weight saving reasons. I havent put pin to paper yet So nothing is set it in stone. Im hoping to get the graph paper Out this evening and draw out my plans ... Hope that yall check out my videos. There project videos. unfortunately My skills at tinkering are better than my video making skills Also i have a top secret project coming soon. its related to fishing and boating.
Thanks for the question, Luis. The answer is debatable. Factors including boat weight and hull type, expected performance, and expected uses all come into play. Then there are variables like cost, local availability, local service options, and brand loyalty to consider. Sorry but there's no "one size fits all" answer to this one!
@@DecarbPeter Would love an update. I am so sick of stinking, explosive fuels, leaking oil, clogged water cooling systems. funky carbs, etc.! Let's go electric!
@@thomaswentworth9380 I have already had and used three different Torqeedo models, most recently a Cruise 2.0. The Cruise system is designed to be installed and left in place, not as a portable which is what I need now. Recently ordered an ePropulsion Spirit One+ which appears to me to be the most advanced (longest range and quietist) 3-4hp equivalent out there, and way less expensive than the similar Torqeedo 1103. The Torqeedo's generally worked well except for the foldable first 1 1/2hp one which Torqeedo finally replaced for almost free after having to replace six failed batteries 7 or 8years ago.
@@DecarbPeter Wow! Thanks for the quick replies. I am going to testi a Torqeedo 3 hp myself soon, so I'll let you know what I learn. I am so curious about those ePropulsion motors, too. They are a lot cheaper than Torqeedo, but I am wondering if you get what you pay for? Thanks!!!
Thanks for the comment, Thomas. While electric outboard tech is certainly advancing rapidly, battery weight, range, and expense as compared to gasoline outboards all remain significant barriers to their widespread use and the vast majority of the portable outboards in the marketplace today remain gasoline-powered. That said, we're certainly excited to see the evolution of electrics and will continue reporting on them as developments warrant. We will, however, put this on our list of possible video topics for future consideration.
Thanks for watching, Dan. Yes, the questions about what size/length motor to buy seem to be the most common we're getting. Like everything else, though, everyone has a different opinion. We prefer to stick with manufacturer recommendations.
Very well done short video right to the point very nice
Thanks so much for watching, Paul! And if you're a BoatUS Member, you may be interested in an upcoming article in the June/July 2021 issue on the latest technology in small outboards.
Thank you for information and advice, on smaller outbords, regards Rodney Dockrill from Cairns QLD Australia
You're welcome, Rodney! Thanks for watching
Hope all is well And thank for the tips ! Keep it up !
You're so kind, Dal. We're all doing well though still stuck at home. Hope you are well, too! As always, thanks for watching and commenting. You always make our day!
Speed is a big component!!!
Thanks for watching, Darren! You're correct--though horsepower needs to be matched to the individual boat. It's dangerous to get a motor that exceeds weight or power recommendations from the manufacturer.
Thanks for the info. I have a 4 meters aluminium fishing boat. I don't want to go the open ocean. Just rivers and lakes and if I go in the open ocean not really far. I want to know how big motor I should buy? Is 40HP should be enough? Thanks
Hi Syed and thanks for your question. If possible, you want to check with the boat manufacturer to find out what the largest outboard is that's recommended. You don't want to exceed that, or it can be dangerous. With the info you gave, however, 40 hp might be a bit too much for this boat, especially if it's lighter weight. But it's hard to give you an exact answer without being there in person and having more info. You might also want to read some of the other questions and answers here as others have asked similar questions. It may help you narrow down what you need.
Thanks for replying. I will check that.
Tohatsu 9.8hp four stroke is the best motor I have ever owned, got it 2018 and it is virtually in constant use in salt water. just cant fault it.
That's awesome, David. Glad you've have good luck with it. If you're a BoatUS Member, you might be interested in a story we have in the upcoming issue of BoatUS Magazine on the latest technologies in small outboards. We talk a little about the Tohatsu propane outboard in it. The technological advances in smaller motors are mind-boggling!
Great video! I'm having trouble finding information about my old boat. I can't find a HIN number. It's a Cadillac 13.5 foot aluminum row bow with a 48" wide by 15-16" transom. It's a three seater and is 54" wide at the widest part of the hull. I'm looking to buy a 9.9 HP Merc. Is that to big? Too small? and what should the length of the shaft be? I appreciate your time and input.
Wow! What a cool boat, Start! That's a new one to us. Measure from the top center of the transom to the lowest point on the transom, and then get the shortest shaft length that matches or exceeds that measurement. You have to be exact -- you mention it's "15" or 16" and if it's 15" a 15" shaft motor will be fine, but if it's 16" you'll need a 20" shaft. As for horsepower, without knowing the manufacturer's specifications it's a guessing game, and we can't make any guarantees. That said, a 9.9 might be a bit much. An average modern 12' Jon boat is rated to 6 hp. That doesn't mean your boat can't handle more, but that's a judgment we can't make from afar. If you haven't done so already, check out the website www.wagemakerwolverineboats.com/cadillac_aluminum_boats. There's a plethora of info there on the history. You might try reaching out to Brian for more info. And the reason you can't find a HIN is because you boat predates them. They weren't required until Nov. 1, 1972. Hope this helps and have fun with it!
Hi there. I have a 4.3 tinny and want to use it in the bay. What size motor do you recommend for that? I have a motor which has an extra long shaft. My boat transom is 20 inches. And that motor is 24 inches and that is 40hp. Thanks
Thanks for the question, syednaqvi1804. Unfortunately that's a hard question to answer without seeing your boat in person and getting more info. Generally, a boat with a 20" transom would take a long shaft (20") motor. As far as recommended hp -- it really depends on manufacturer recommendations and how much weight you're trying to push around. Doing some research, it seems that folks with your type/size of boat went with 30 or 40. Some folks found that the 30 was enough. Others felt they needed the 40. Bottom line: You want enough power without being overpowered, which is dangerous. If you can, I'd consult your boat manufacturer or talk to the company making the motor you're considering.
Thank you so much. Syed
Enjoyed the video. Thanks. Port Royal, Jamaica 1990?
Thanks for watching, Robin. Not sure what you're referring to by "Port Royal, Jamaica"
2@@boatus
You say you should measure your transom to know what shaft length you need, but what is the formula to determine shaft length after you have transom depth?? Or is there a table to determine that?
Thanks for the question, Uvickerns. Outboards are commonly available in three shaft lengths: 15, 20 and 25 inches, with 20 inches being the standard and the most common size. As a general rule, the cavitation plate (the flat plate that forms part of the outboard leg directly above the propeller) should be level with the bottom of the transom. For larger, heavier engines that are rigged by a dealer, they will be very familiar with which size engine to use, and you should be guided by them. But of course, there are exceptions to every rule, and a long shaft could be used on a boat that requires a standard shaft but the boat will be slower by a knot or two due to the increased drag. Also, there is that much more potential for the prop to hit a submerged object as it hangs lower.
My best advice would be to seek the advice of a local dealer who will have extensive knowledge and can ensure that you are using the correct shaft length.
What's the difference between 6h5 and 6f5 starter?
Can you give us more information, sasha? From a very quick search, the 6h5 is a tilt/trim motor and the 6f5 is a starter motor, but without more information, we cannot give you an accurate answer.
I currently have a 25hp on a 14’x5’ with a 20” transom boat, the motor has electric start and trim, but I think it might be too heavy(180lbs plus or minus). Do you recommend a 20hp with same futures at about 124 lbs or 30hp at 131 lbs manual. The boat is rated at 920 lbs total and rated at 25. Any advice?
Thanks for the question, Yoisdel. If the boat is rated for 25, we wouldn't suggest putting a 30-hp motor on it, period. And note that 20 horses is usually plenty for a 14-footer. Also, remember that, depending on the brand, a 25 could be the same weight as that 20 you're considering. A Yamaha F20 and F25, for example, have the same powerhead and are both 126 pounds. In any case, it's wise to consider the difference between weight and power between the 20 and 25 since a 50-pound jump (which is about what you'll see with most other manufacturers) will shrink the performance difference. Either way, it's best to remove the 30-hp engine from the conversation. Hope this is helpful!
I have 14 ft v hull fiberglass And I paired with mercury 20 hp 4 stroke you think I overpowered it ?
Hi Eddie. It really comes down to the weight of the boat and maximum recommended HP by the manufacturer. Without more information, it's hard to say for sure. If possible, double check manufacturer specs. It could be dangerous if it's overpowered.
Excellent information, I measure the transom is 23” need long or xtra long shaft ? Is an old bass boat Monark Macfast 5. I would to know what do you suggest for hp? Thanks so much
Thanks for the question, Jairo. I reached out to Lenny who had the same issue with one of his boats. Occasionally when dealing with some very old boats you'll encounter transoms such as this, which weren't built to today's more universal standards. Putting a 20" shaft motor won't work without modification; as soon as the boat begins to plane, the prop will be starved for water. You can cut the transom down in some cases, but you have to make sure there's room for turning the motor without any of the rigging hanging up or hitting the edges. You could also try a jackplate, but the results can't be predicted ahead of time - it might work, it might not. And to get the motor at the right height, you may be unable to tilt it or align the steering and/or rigging in such a way that it doesn't have issues rubbing against the transom. You may also find that the motor is too low to the water. The safest bet is to go with the longer shaft.
Regarding the horsepower question, we're not very familiar with these boats as it looks like the model was only manufactured about two years, but from what we've seen online, the max recommended is 85 hp. Others that have this model seem to be running a 70 hp. That said, because overpowering can be extremely dangerous, we strongly recommend consulting someone who might be able to confirm this info. Or do some online searches to see what others are running. Might help answer your question on the shaft length, too.
i have a 14 ft v hull with a 20 hp mercury 20" shaft. My transom is 15 inches, however the previous owner installed a mounting plate that raises the motor another 4-5 inches. is the long shaft okay?
Thanks for the Q, Hunter. Chances are yes, however, once you modify a boat's transom and raise up or cut down the motor's mounting position from what the manufacturer designed and built, all bets are off. It's a good possibility the previous owner did this to accommodate a specific outboard but we have no way of knowing if it worked or not, and how well. The only way you can be sure of the outcome is to put the motor on, give it a shot, and see how it runs.
What type of motor should I get for my 12 foot boat
Thanks for the question, ASMR. Unfortunately we're not in a position to give you a specific answer to your question due to not knowing what kind of boat, where you boat, etc. For a boat that size, though, you might consider one of the many electric options now available. Lenny was a hold-out on electric for a long time, finally took the plunge, and now is a huge proponent of them. (He's got an article about this in an upcoming issue of BoatUS Magazine.) When I asked about range issues, he said he hasn't had any. The one thing we can tell you is not to exceed the maximum size motor recommended by the boat manufacturer. It could be dangerous.
I have a 12 foot aluminum v haul. What size motor do I need? Is 10hp to big? I just need it for fishing lakes
Thanks for the question, Sam. 10 hp sounds about right, but you should always check the manufacturer's specs and Max power rating to be sure you don't overpower a boat when putting on a new outboard. Hope this helps!
is it possible to replace a different brand like Yamaha or Suzuki for 15' Boston Whaler Mercury outboard?
Absolutely, WestCoast. Doing so will likely require re-rigging, but if your current outboard is outdated, you've probably got outdated steering and throttle-control systems, too, so they'd need to be changed out anyway. Hope this helps, and thanks for watching!
thanks
Thanks for your time, what's the best petrol for outboard motor??! 98%???
Thanks for the question, Behrang. You should always follow the recommendations as contained in your owner’s manual for your particular motor as recommendations vary. Also, it will make a difference if your motor is a four or two stroke. Often, two-stoke motors may not need as high an octane rating as a four stroke.
Sir my boat height is 1meter, 5meters lenght and 1.5 meter. What should be the right length of shaft and horse power should i buy for my boat?
Thanks for the question, Gener. The critical dimension for shaft length is transom height. Measuring from the top of the transom to the hull bottom at the center of the transom, match the height of the transom to the published shaft length for the outboard (IE if it's 15 inches, a 15-inch shaft length is appropriate). Most outboards are available in 15, 20, 25, or 30 inch shaft lengths, and most boats are built to ideally match one of these lengths. As far as choosing horsepower goes, it's a matter of personal preference up to the maximum horsepower rating established by the manufacturer. Weight is a critical factor, as some boats of the size you mention, such as a light aluminum jon boat, can plane out and run just fine with as little as 20 horsepower. But a heavier fiberglass center-console of this size will more likely need 40 or 50 horsepower to produce satisfactory performance. Hope this helps, and thanks for watching!
What size motor and brand would you recomened for a 4'x8' dingy, i would like to have a reverse and be able to hook up an extra gas tank if needed.
Thanks for the question, James. For a boat that small, you don't need more than a couple horsepower. In fact, you might want to consider one of the new electric outboard options to avoid the gas issue altogether. 1- to 3-hp models from the lines of ePropulsion, Torqeedo, and others have self-contained, rechargeable batteries with significant range. Before you commit to one, check the capacity plate on your dinghy, which lists the max hp (and max weight capacity). It will be located on or near the transom.
Whats the best 5 hr power on the .arket
Hey Michael. The answer to that question is debatable. However, 5-horse outboards are much simpler than larger motors and most are very reliable. The one other thing we'd note is that electric outboards are a new option in this size range which are well worth considering. Though they're more expensive and range takes a hit, the new crop of electrics are a pleasure to run with zero noise, exhaust, or vibrations, starting issues, etc. Thanks for watching and for your question!
My Macgregor 26D has a 20" transom measurement and the old outboard was a long shaft 20". Guys online are saying get the extra-long shaft; some say for rough seas. What is the downside in performance for a longer shaft than measured as needed?
Thanks for the question, Martin. Having a longer shaft increases drag, which reduces speed and efficiency. Since the MacGregor 26 is a planing boat the difference could be significant and generally speaking the best move is to stick with the manufacturer's recommendation, so if the old one worked fine, we'd say it's probably best to stick with the 20" shaft. If you noticed the prop gulping air in rough seas, however, a longer shaft would likely resolve that issue. Thanks for watching!
Hello sir what's the best for Jonny bass boat 100 a 15" or 20" thank you
Thanks for the question, Monssif! On a very small boat like this, the 15" shaft will be your best choice for sure.
@@boatus thank you
What size shaft for 17 inch transom? Thank you!
It's a tracker 1648
Thanks for the question, Ryan. Are you sure you have a 17" transom? The online specs say it's 19", but perhaps older models had different transom heights? We always recommend going with the manufacturer recommendations, which should be fairly easy to get with a quick call or email to Tracker. In case it is truly 17": Occasionally when dealing with some very old boats you'll encounter odd transom heights that weren't built to today's more universal standards. Using a 15" shaft motor won't work without modification. As soon as the boat begins to plane, the prop will be starved for water. You can cut the transom down in some cases, but you have to make sure there's room for turning the motor without any of the rigging hanging up or hitting the edges. You could also try a jackplate, but the results can't be predicted ahead of time - it might work, it might not. And to get the motor at the right height, you may be unable to tilt it or align the steering and/or rigging in such a way that it doesn't have issues rubbing against the transom. You may also find that the motor is too low to the water. Without further input, the safest bet is probably to go with the 20" shaft. Hope Tracker's customer service folks can give you a more definite answer though.
@@boatus yes, it's 16 3/4 inches.... If you count the drain tube sticking down its 17 1/4. I have a long shaft mercury 20hp on the way. I'm planning on getting the on the fly jackplate to go along with it. Thank you
@@catfishandwhitetails Fingers crossed that it works out for you. Those odd transom heights can really be tough. Here's hoping for no issues and many years of problem-free boating!
Hoping you might know. I am looking to buy a 15hp Honda outboard for my brother as a surprise. I know he has a 13 foot Valco aluminum boat and figure a 15" shaft is the right fit. Like I said this is a surprise so I don't want to call him for measurements. Any suggestions? Appreciate any help.
What an awesome gift, replus! Unfortunately we would be doing you a disservice by trying to guess this without being there in person. Because you aren't able to get the measurement directly, I'd try to find the specs online, though it looks like this may be an older boat so that may be difficult. Also, you would be assuming the transom is original and hasn't been modified. (I'm seeing some ads that mention the transom has been built up.) You might want to look for a Valco group on Facebook or look online for an active forum with Valco owners and ask for advice there. I wish we could be more helpful, but we certainly don't want to steer you wrong. Hope your brother loves the outboard, and here's to having fun on the water!
so i done goofed buying the right shaft length, but what can i do to buy a boat with the right height bc im un sure and need some assistance
Hey, JRF. We're not 100% sure what you're asking here. Could you clarify? It's hard (if not impossible) to diagnose issues remotely. You might want to consider consulting with a local dealer or other professional to advise you.
@@boatus I have the 20" shaft 9.9 Yamaha 4stroke. I am having trouble finding a fishing boat to fit that size. Looking for a 12-16 ft boat
Gotcha! That's helpful. There are a number of fishing boats out there with 20" transom rises to match your engine. That said, without knowing where you are located, where you are fishing, and what kind of fishing you plan to do, it's hard to narrow down the options, especially when it comes to hull shape -- deep V, semi-V, flat, multihull. You're probably going to need to stay in the 12-14 foot range for that size outboard though: jon boats, skiffs, pontoons. Take a look at Lund. It offers a variety of boat types, and the new ones are sold without engines. Several models have a 20" transom height. But there are other brands out there. Try searching "20" transom height fishing boat" in a search engine. You might turn up some other options. Hope this helps.
Thanks, it was very helpful. I know that it's not common to talk to a specific brand type in the youtube for you guys but is possible to talk about that and say which brand is better in terms of quality and performance. Actually, I have stocked between Honda, Yamaha, and Suzuki but some people believe that mercury is better in terms of maintenance cost. Or if it's possible tell us some hints about choosing better brands.
Thanks for watching, Yasser. I wish it were that simple. Unfortunately there are too many variables to talk specific brands. Some folks have very specific preferences for whatever reason (like trucks or cameras). Some stick with a brand they've always used. Some go by price, features, or performance. It really comes down to your individual needs. If you narrow down your options, you can do research on any issues, find customer feedback, talk to a dealer/mechanic, or join a Facebook group or board to get feedback from others with experience. The best thing you can do is research, research, research and make the best decision for you based on the info you have available. Good luck!
Bought a 16ft wide bottom Jon Boat. Has an 25yr old 6hp Johnson. The motor doesnt run from sitting too long. Should I rebuild Johnson motor or buy a newer 10hp motor? The boat will be used on small river with little current.
Thanks for the question, VA-115. It’s hard to give specific advice without seeing the motor in person. There could be lots of reasons that the present motor does not run. These could include stuck rings, stuck valves, gummed up carb, poor high-tension lead and so on. What I can tell you that it can most likely be rebuilt fairly easily as this is such a small motor. It would be a shame to discard the engine if the repair is likely to be something minor. Why not have a go at working on the engine yourself? I am sure that you can find a workshop manual online, parts should still be available and even if you are unable to get the engine running you will have lost very little but you will have learned something about the interior workings of a small outboard. I personally was faced with a similar situation after a small engine that I owned was dropped into the sea. I was able to fish it out again and after a few hours work and some spares was able to get the engine up and running and I still use it to this day.
@@boatus thank ypu greatly for the reply. I am mechanically inclinded and will give a go at the 1982 Johnson 6hp motor. Thanks for giving me a direction to go. Was so undecided.
@@va-115airframer7 You're quite welcome! Good luck with the project and let us know how it goes.
@@boatus will do. Thanks again.
A 16’ jon on a river I wouldn’t go less than 20hp. Especially if you’re going to have a few people and gear in the boat.
But then again I’m used to the Missouri River where we ran a evinrude 48spl on a 17’ semi- V jon and it did great in the current with 4 people and fishing gear, cooler, etc. lot of friends are running 25- 40hp surface drives now as we duck hunt with the boats as well.
Can u do the drag net pull by 10HP motor with 5 metres. Small boat or do you need higher HP
Hi Henry. Thanks for the question. Can you give us a little more info? We're not exactly sure what you're asking.
Is a suzuki 2020 df5a a good outboard
Thanks for the question, Bastian. Unfortunately we can't give you a yes/no on that as we're not in the business of testing engines. It sounds as if you're already doing your homework, which is what we always recommend. I don't think this is the first model year for that outboard, so you may be able to research common problems online. In general though, a lot of people I've talked to have said great things about Suzuki outboards. But like anything (Ford vs Chevy trucks, Nikon vs Canon cameras, etc.), people are going to have strong opinions about brands. Don't get too caught up in that--do your own research and determine whether it's right FOR YOU. Good luck!
Im planning a plywood flat bottom (a jon boat build)
48 Inches wide with the sides at a 22 degree offset. The intended transom depth is 24 inches.
overall length of 14ft.
Im hoping to build it with 1/4 inch
Plywood And sheath with fiberglass ...
My question is how would i determine the horse power needs
For such a boat
Thanks for the question, georgia. You do not say whether you are making a boat to your own design or if you are following a professionally designed plan. If the latter then the maximum designed power should be marked on the plan, and you should adhere to this. If this is to your own design then the answer is much harder. The required power depends on so many factors: the weight of the boat, how many crew you intend to take out, the width of the transom, how strongly the boat is built, and so forth.
I suspect that this is boat to your own design, as you say that you will be building this with quarter inch plywood, which may well prove too light and not strong enough for the sides of the boat let alone the bottom, even if sheathed in fiberglass. Unless you know exactly what you are doing, I would get a naval architect to look over your plans and give you some guidance and recommendations with regard to material thickness, (often called scantlings in design parlance), and the maximum horsepower.
@@boatus Thank you so much for taking time to answer.
Yes the boat is going to be my own design. it isnt going to be any different from a factory jon/john
Boat. Aside from the fact that the transom depth will 24 inches
And all plywood.
During the time ive been playing
With this idea in my head the strength of 1/4 in plywood comes to mind for me as well.
Id only thought of 1/4 inch plywood
For weight saving reasons.
I havent put pin to paper yet
So nothing is set it in stone.
Im hoping to get the graph paper
Out this evening and draw out my plans ...
Hope that yall check out my videos.
There project videos. unfortunately
My skills at tinkering are better than my video making skills
Also i have a top secret project coming soon. its related to fishing and boating.
Whats the best outboard for a 14 footer?
Thanks for the question, Luis. The answer is debatable. Factors including boat weight and hull type, expected performance, and expected uses all come into play. Then there are variables like cost, local availability, local service options, and brand loyalty to consider. Sorry but there's no "one size fits all" answer to this one!
I noticed the focus was on gas-powered engines. How about Li-ion powered electrics, like Torqeedo? Thanks!
And ePropullsion, Elco, EP Carry electrics as well! This video is so far out of date it is not funny.
@@DecarbPeter Would love an update. I am so sick of stinking, explosive fuels, leaking oil, clogged water cooling systems. funky carbs, etc.! Let's go electric!
@@thomaswentworth9380 I have already had and used three different Torqeedo models, most recently a Cruise 2.0. The Cruise system is designed to be installed and left in place, not as a portable which is what I need now. Recently ordered an ePropulsion Spirit One+ which appears to me to be the most advanced (longest range and quietist) 3-4hp equivalent out there, and way less expensive than the similar Torqeedo 1103. The Torqeedo's generally worked well except for the foldable first 1 1/2hp one which Torqeedo finally replaced for almost free after having to replace six failed batteries 7 or 8years ago.
@@DecarbPeter Wow! Thanks for the quick replies. I am going to testi a Torqeedo 3 hp myself soon, so I'll let you know what I learn. I am so curious about those ePropulsion motors, too. They are a lot cheaper than Torqeedo, but I am wondering if you get what you pay for? Thanks!!!
Thanks for the comment, Thomas. While electric outboard tech is certainly advancing rapidly, battery weight, range, and expense as compared to gasoline outboards all remain significant barriers to their widespread use and the vast majority of the portable outboards in the marketplace today remain gasoline-powered. That said, we're certainly excited to see the evolution of electrics and will continue reporting on them as developments warrant. We will, however, put this on our list of possible video topics for future consideration.
Last comment...Is one of the biggest downfalls of used boat motor buyers...Know your Transom measurement and get proper length motor...
Thanks for watching, Dan. Yes, the questions about what size/length motor to buy seem to be the most common we're getting. Like everything else, though, everyone has a different opinion. We prefer to stick with manufacturer recommendations.