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Chad Wassink
เข้าร่วมเมื่อ 5 พ.ค. 2012
Onager Catapult Trials
These are the fourth field trials of our powerful one-third scale catapult. We are throwing a 6 ounce billiard ball.
มุมมอง: 255
วีดีโอ
Powerful Mini-Catapult Field Trials
มุมมอง 197ปีที่แล้ว
This is a 1/3 scale model of a larger catapult we are building. We are trying to perfect the design before we start building the larger one. We've been cutting and squaring beams for the larger one, but have not detailed the final design yet. That one will be optimized for shooting 10 pound projectiles, so that is why we are shooting 6 ounce projectiles here. Tripling the length also means trip...
Chainsaw Milling a Large Beam From a Log
มุมมอง 234ปีที่แล้ว
Today we make a 9.5" x 10.5" x 9' long beam from a Scotch (Scots) Pine tree. There are other videos out there of similar methods, but I attached a level to my bar to assist in keeping my cuts on-plane. I did get the idea from another creator who attached the level to his housing, but I tried to improve on the idea by attaching directly to the bar, with a machined piece of aluminum.
Simple DC motor kit
มุมมอง 1.1K11 ปีที่แล้ว
This is a demonstration of a small yet powerful DC electric motor my daughter and I built from a DIY kit. It uses an electromagnet made from a cut-off nail and two AA batteries. A fabricated reed switch takes the place of the commutator. The rotor has two powerful Neodymium magnets. We put an output pulley on it since it has some decent torque. I just need to figure out what to power with it. I...
1970 Rupp Roadster
มุมมอง 5K12 ปีที่แล้ว
A project bike that my son and I fixed up. I bought it as a rolling frame 2 years ago, and didn't worry too much about making it original. We spent a couple of months on it, then he hit a tree after about 10 minutes on his first ride. We put some more time into fixing it again and had some fun with it. Now he's outgrown it, so I'll probably get rid of it. I have a soft spot for Rupp's. My dad h...
Speed Test - Johnson 9.9 to 15 hp Conversion
มุมมอง 285K12 ปีที่แล้ว
The motor now has a 15 hp carburetor. This video documents the difference it makes to a Johnson 9.9 motor. It is a pretty easy modification, if you can find a carburetor. For the original motor's results, see my previous video. Both tests are using my 12' jon boat. The main benefit of the 15 hp modification was seen when the boat was fully loaded. I have also put a tuned exhaust on since this v...
Speed Test Johnson 9.9
มุมมอง 180K12 ปีที่แล้ว
This video shows the speeds attainable with a 1976 Johnson 9.9 hp motor on my 12' jonboat. The actual net hp for this motor is about 8.3. I hope to later modify this motor with a 15 hp carburetor and a "tuned" 15 hp exhaust to increase the horsepower and then retest. The results of the carb change only are listed at the end of the video.
1953 Firestone Outboard Motor - 3.6 hp
มุมมอง 3.4K12 ปีที่แล้ว
Test run of my 1953 Firestone outboard motor (made by Scott-Atwater).
You should have had one of those kids 🧒 drive, that would be less weight..................Use your head mate. 😭😳😘😒😩
Yeah, that would have helped.
Thats what get with non 83 johnson 9.9 no conversion on a v hull 12 footer
540lbs why far tooo much weight????
That is the boats rated maximum capacity.
All I could think of is the cottagers looking out going who in hell is that nut lol
What size prop and pitch!
What size boat
25 that's pretty fast
Where can I find a 15hp carburetor for my 9.9 Johnson 1976? It’s impossible
Im looking myself lol
Scour ebay for months at a time
Thank you for this video. Helps me.
Theres no way with a 15hp anythonh
Anything
Can anyone tell me how to change my 9.9 to a 15 ho please
Google "Leeroys Ramblings 9.9"; this is an excellent resource for anyone looking to do this. In short, you need to find a Johnson 15 hp carburetor (for this series) with a 7/8" throat diameter and change it out.
Chad Wassink. Thank you
You need a 15hp prop too or you will over rev.
@@brianchisnell1548 What is the stock size/pitch for the 15hp Prop?
Man i havr that same boat but a 14 ft & same motor
Did you ever modify it, update? Thinking of doing this with mine
I love these motors
Loaded at max weight of 540 pounds? so you, 2 teen girls and a dog weigh in at 540 pounds? Im confused... did you fill a live well too or something?
From what I recall, the gas tank was full, so that is 38, I weighed about 210, the dog was 70, the motor is 67. That leaves 155 pounds for the two girls. The tag max weight includes the motor.
Hi jus got lowes jon with a 6hp was the trick to get on plane or nose down mine jus rides a wheelie n get no speed no power trim n set on lowest setting down
How big of a motor can you put on that boat and what size is the boat
its a 1236 rated for 15hp (I have the same boat)
If you don’t have a boat license and are using that conversion that is 15 hp and the most you can have without a boat license is 9.9 hp. Your technically not allowed to use it without a boat license. please prove me wrong. I want to make mine like that.
"technically" ... you would have to put the engine on a dyno to prove it wasn't a 9.9 unless you go blabbing on to the Parks and Wildlife guy about your modifications. This is not a visible modification unless your eyes are so good you can "see" 1/4" difference in the carb venturis on a boat on the water and even then "It was that way when I bought it" is a viable response and it's a lot more legitimate than just putting a 9.9 cowl sticker on a 15. Most Rangers aren't going to look up your Ebay history when giving you a sobriety test. Behave responsibly, and you probably won't get harassed in the first place. If you're that worried about it, don't do it.
I'm not sure what you are referring to. The boat is registered in the state of Michigan. The boat tag on the transom says the max horsepower allowed for this boat is 15 hp. I'm not aware of any other restrictions for the waters I am on.
Reed spacers and tuned pipe
did he bend the forks when he hit a tree?
Plenty quick enough
how did you mod the exhaust?
I found a "tuned" exhaust from a newer early 1980's Johnson 15 hp motor on Ebay. I forget which year they changed to the better exhaust but I think it was the last few years they made this motor. I don't think it did much at all.
@@chadwassink7846 and it is alot of work to change out that exhaust tube too. lol
@@rrrttt1112 Yes, it is a fair amount of work, for no gain that I can see. It can probably be done in a couple of hours, but I don't think it's worth it.
Dont need much more than that, my friend!
What size and pitch prop did you change to?
Thanks very much for these important information after and before tuning. I buyed a 9.9 Johnson for my 3. 20m inflatable boot and after this video i think it's enough
Glad it helped.
why not just buy a 15hp?
The 9.9's seem to be more common. It is simply what I found for sale locally that was in my price range. I did not know anything about the 15 hp conversion when I bought it. I only found that out later, so I kept watching ebay until I found a 15 hp carburetor. To your point, I agree that just buying a 15 hp motor (if you can find one) is much easier.
good answer.
There are also lakes that only allow a 10hp maximum so it’s cool with the mod you can keep food speed fully loaded.
Which prop did you end up putting on?
Good video. Check out my brand new 2017 15hp Suzuki on my channel. I just reviewed it. It's fuel injected.
jou wil go faster with a difrent piched prop
Hauls ass
The narrow jon boat (36) slow down more with added weight. The wider jon boats (48) are less affected by added weight.
The carburetor is the only thing that made a significant improvement for me. Seems to account for 99% of the improvement, but I would have to start back at the original setup to really know for sure. The exhaust makes it louder, but adds nothing to the top end. There was no top end difference with the shims either. Perhaps acceleration may have changed with either modification, but I was not testing for that so I don't know. I changed the prop and got the top speed to 26.9 mph (light load) now, but acceleration is a little slower.
Acceleration may be a bit slower b/c you've sacrificed some low/midrange TORQUE with the bigger carb. IOW, it's the same thing that happens when you put heads with larger intake valves on a 4-stroke motor. You increase max hp potential but you lose air velocity at the lower end. As for top end speed gain it may seem modest but you're up against the law of diminishing returns - drag increases faster than speed. The real difference may be apparent with the boat heavily loaded; it won't LOSE as much speed with three people aboard as it did with the 9.9 carb.
When I mentioned that the acceleration was slower, I meant because of the higher pitch prop. I don't think i lost anything due to the shims and exhaust mods, but I can't tell that I've gained either. This video mainly showed the increase from just a simple carb swap, and the significant advantage was when under load.
What size prop did u go up to
What's the prop diameter and pitch
Did you ever do the tuner swap?
I live in Tampa and back when I had my boat which was a 1959 DuraCraft the jet skiers clock me at 33 knots with my dog that weighs 65 pounds inside but I also had a concrete block in the front a standard 8 inch by 12 inch
great job doing testing,i have the same boat with a Yamaha 2.5 hp 4-stroke. top speed is 6 mph. the boat will not plane.
Hi ...you do not need a carb, all you need is a main jet and reed valve spacers........only on some models....Note depends on year, a lot more mods may be required....nice job
I think the venturi size is different too.
The throat size of the 15 hp carb is 7/8", for the 9.9 it is 5/8". You can see the difference looking down the carb. The 9.9 motor is basically a detuned 15 hp, primarily by using the different carb body. The extra mod's were used on later years of the 15 hp to try to match the performance of Japanese 15 hp motors (from what I have heard), but I did not see any improvement at all after I added these.
Jetting it richer with the same small venturi will just make it bog out! You need a carb with a bigger 'throat' for less restrictive breathing.
Those minor mods MAY show up on a dyno but maybe not on your boat where they may only mean a fraction of a mph increase.
Is your reverse broken? heading into that dock fairly quickly, reverse would help you there.
You ever consider a jack plate
I put a jack plate on a 12 vhull with a 9.9 Nissan;20.8 mph with me and dog.Helped a lot with spray back into transom.worth doing andeasy to do.
Can you do an up river boat test?
I have a 76 evinrude that I went thru and it starts 1 st pull 90% of the time. I would love to have a 15hp carb but have NO idea where to find one, please help. Thanks Glen
Keep your eyes peeled on ebay
Ebay
Great Video- thank for doing it!
That bad boy is running strong. Great post.
Thanks for the very informative video, I want one.
You're awesome! Thank you for posting this, think you answered the "million dollar question," for many 9.9hp outboard owners!
Depending on the year of that engine, you need to add reed valve spacers for it to gain a full 15 hp at the prop. exhaust tune pipe and carb is not enough.....Depending on the year, some 9.9 already had these spacers, and some years don't......It's important to have them if this one has none !!!
dog was bit sad you forgot to take him/her 2nd time lol
Appears convincing enough when comparing the 9.9 carb video to the 15 carb video, but I would also like to see the 9.9 carb perform with just you, the motor, gas can, and oars, as is shown in this video... (and not shown in your 9.9 carb video). A positive result would probably have me looking at putting a 9.9 carb on my 1986 6hp Mercury.
The test you describe is shown in the previous video (except for the oars), starting at 1:53. The result was 22.5 mph for minimal load. The gas tank shown on shore in that video is an extra I used for weight in the fully loaded test. The real gain from the 15 hp was with a fully loaded boat, which was only 13.4 mph with the 9.9. So from the 15 hp conversion I got a 60% increase when fully loaded, and an 11% increase when minimally loaded.
Chad Wassink Cool! Thanks!
Except a 9.8 merc is a different motor than a 6. At one time an OMC 40/50 and 60 horse were the same motors, carbs and exhaust tuners were the only difference.
Won't work. The OMC 9.9/15 powerhead is 13 cubic inches, enough to crank out 15 ponies. It's restricted by a small carb and a less efficient exhaust downtube on a 9.9. Removing these restrictions gets you the full power potential. The Merc 6 probably lacks the displacement to get you 10 HP.
Thanks for posting, very informative.
9.5 diameter, 10 pitch
Hey what size carb would be best for a 2007 mercury 2.5 hp??? I wanna go faster...lol
So buy a bigger motor😂 you not going to get any kind of speed out a 2.5hp🤣