Im 12 years old and have a Yamaha 5 hp 2-stroke 2007 and a 4 hp 2-stroke Yamaha 1990 and a mariner 2 hp 2 stroke these yamaha motors are the best because of the weight and the power you get out of it i love them and great video by the way 🎉
estimado consulta : cambié el engranaje que da presión de agua a mi motor pero no logró que el chorro de agua de descarga sea continuo. el motor anda hasta que calienta y se para . me podrás ayudar?
It could be a few things. You could either have the impeller in the wrong direction, a missing woodruff key, or perhaps the water tube isn’t fully hooked up to the top of the water pump housing. Another thing is that the water jackets could be clogged with salt,debris etc. If they engine isn’t pumping water consistently and shutting off that means it could be overheating. If the side of the motor on the water jackets are not cold then the engine is not being cooled properly. Let me know if this helps.
I just bought a 2007 5hp two days ago. Runs good but has a rough idle and had been running on 50:1 not 100:1. I have also noted the 2 way fuel switch for the internal tank has been bypassed to only run external fuel with no fuel filter. A full service like this one should fix any issues. Looks like the design hasn't changed a great deal from 1990 to 2007.
To my knowledge I don’t think there is a flush port on these. However you could probably make one by splicing into the water line and doing some type of quick connect.
Hello! Does the 4hp 2stroke have posibility to add an external fuel tank alimentation line? I saw that they don't have that conection. Is any posibility to add it?
On this outboard in particular I did not see an external tank hook up. I’m sure there are probably ways to run it but they don’t come with one built in. I think starting at 6hp+ is when they have it built in.
I've got the same motor...it takes FOREVER to get it started! I've cleaned the carb but any other ideas to maybe get it to start on that first pull every time? On the water I look like a madman trying to get it to start!
I know the feeling! I would say if it’s taking a while to start but is eventually starting, it could be weak spark - Bad magnetos at the flywheel / fouled spark plug. If not that then possibly a fuel issue, I’d check the vent on the gas tank, and the fuel lines running to the carb for leaks.
I think I got those spark plug pullers from Walmart honestly. Not the best ones, but they work, they have a 3 pack which will have one of the correct sizes for this plug.
@@kCI251 Normally what I do is put the water pump housing over the impeller, and spin the driveshaft clockwise until the impeller is inside the housing. Adding a little bit of soapy water/lubricant can help.
Thanks man. Can I ask you what fuel/oil ratio you use? Ive heard the correct mixure is 1/100 which seems very thin to me. Just curious because yours runs like a top.
Thanks for you time on this video. I've heard that one can change horse power simple by switching carburetor from a 4hp to 5 or 6hp any thoughts? Dose the propeller also need to be changed?
I wouldn’t say change horsepower necessarily, but by switching to a bigger mm carburetor it could potentially increase your horsepower, only slightly though. When it comes to propellers they don’t affect horsepower. You can certainly buy a higher or smaller pitch propeller depending on the needs of your boat. A smaller pitch prop will usually give you a better hole shot but slower top speed, higher pitch prop will give you slower acceleration but better top speed.
Do you fully close the choke fully or half way open when it is running? If I close the choke full, my 4 Hp Yamaha stops. Is this way that it should be? Thanks
I would have the choke on half when running and it would run good. The choke should only be fully closed when first starting it after a while. I would run it fully open or half open when running it from what I remember.
I'm about to change the head gasket and thermostat on my 1988 mariner 4hp 2 strike 6e0 01. I believe I just need a head gasket and a inner and outer exhaust cover gasket. Does this sound right?
@@Hullsandwheels thanks. I thought the exhaust cover gaskets was the cover for the thermostat. Is their another cover under the exhaust cover? I couldn't find a gasket specifically for the thermostat in parts diagram
@@thestraitgateway Oh okay yes there is definitely a gasket for the exhaust cover. Depending on where the thermostat is there may not be a gasket for it. If you can’t find the part and there happens to be one you can possibly make one with gasket-maker.
Great video mate. I wanted to ask what separates the 4 stroke Yamaha 5hp and 6hp? I want the 6 but 5 is legal limit in Australia without a license. Both same weight but obviously something is different in the 6hp making it faster. Thanks
I would say that considering both the 5 and 6 horsepowers are 1 cylinder engines, the only difference is the carburetor being a little bit bigger, allowing it to have more fuel/air in the engine. You can probably get a bigger size carb for a 5hp, and just tune it right for that engine. Hope this helps.
Hey! Great video. Just bought my Yamaha 4AC, barely used by the former owner and in great condition. Yay! I’m having a problem though. When going from idle up to 10-20% speed the engine dies. Though, when going from idle up to +60% it works fine. Do you know what could be the problem? All best from Sweden
Without seeing it it’s hard to pinpoint exactly what the issue is. It’s possible it’s not getting enough fuel, I would check the lines and the jets in the carburetor. Or, it could be something as simple the choke not being set right. This has happened to me before with other low hp outboards. Hope this helps and best of luck. Thanks for watching!
@@Hullsandwheels Thanks for the quick reply! The choke is set to 0. I only had to use the choke on my former Mariner 5hp for getting the engine started, then quickly turned it off. Will experiment with it later tonight, thanks!
On most outboards you want a consistent stream. On these apparently it’s normal for them to sort of trickle water instead of shoot it out. As long as it’s consistently pumping water should be good.
The impeller I took out was in very good shape and could have pumped water efficiently. I bought the outboard from someone who didn’t use it in years so I just went ahead and serviced everything so it would be ready to sell again. Thank you.
What were you using to clean. Thanks for great thorough video. Don’t know year of mine yet. Headed over to pull to see if it’s interested in turning over. My 1st outboard engine. Excited to learn from great peeps like you
To clean the outboard in the beginning I was using Purple Power. It’s a very good degreaser. For the carburetor I was using carb/choke cleaner. Good luck with your outboard! Thanks for watching:)
@@Hullsandwheels it seems like the only 2 stroke engines left are found in power equipment like generator and chainsaws, even the 2 stroke oils have become a rarity nowadays
@@danteerskine7678 Yes the 2 strokes are becoming a rarity. 4 strokes are more common nowadays with the better fuel efficiency, reduced emissions, etc. Still see a good amount of 2 stroke outboards though. Reliable motors. Especially Yamaha,Mercury,Mariner,Suzuki. I have a 04 Mercury 125 2 stroke and it has been turn key every time with no issues.
great, but 90% of that maintenance wasnt needed.. like compression tests.. replacing bottom oil... impeller.. spark plug.. motor prob just runs the same after it did before.. that old impeller couldve lasted another 2-3 seasons..
I bought this motor as a project with no service history, and it was sitting for years. So therefore, a full service was necessary in my eyes. Maintenance and preventative maintenance goes a long way when it comes to outboards. Lower unit fluid is an every season replacement, and the motor did not run at all until I clean the carb, adjusted the float etc. Yes, the impeller was fine but I had already ordered it because I didn’t know the current impeller’s condition. The motor went from not running/barely starting, to first pull start every time. Thanks.
No. It’s normal for these motors to trickle water like that, and have what looks to be a weaker stream, even though it’s not. Water jackets were cool to the touch. Cooling was sufficient.
Im 12 years old and have a Yamaha 5 hp 2-stroke 2007 and a 4 hp 2-stroke Yamaha 1990 and a mariner 2 hp 2 stroke these yamaha motors are the best because of the weight and the power you get out of it i love them and great video by the way 🎉
They are definitely great motors! That’s a great collection, Yamaha/mariner will never leave you stranded!
Great video. I have a 1997 4hp 2 stroke. Has inbuilt tank and external hookup
Thank you! They are definitely great motors, very reliable.
I use an identical engine,wat s the fuel mixture,11 ml of oil for each liter of gasoline?
Tanks
@@sergiumanuelgemanaru351 50:1 I believe
estimado consulta : cambié el engranaje que da presión de agua a mi motor pero no logró que el chorro de agua de descarga sea continuo. el motor anda hasta que calienta y se para . me podrás ayudar?
It could be a few things. You could either have the impeller in the wrong direction, a missing woodruff key, or perhaps the water tube isn’t fully hooked up to the top of the water pump housing. Another thing is that the water jackets could be clogged with salt,debris etc. If they engine isn’t pumping water consistently and shutting off that means it could be overheating. If the side of the motor on the water jackets are not cold then the engine is not being cooled properly. Let me know if this helps.
Wow you made it look so easy
Thank you!
I just bought a 2007 5hp two days ago. Runs good but has a rough idle and had been running on 50:1 not 100:1. I have also noted the 2 way fuel switch for the internal tank has been bypassed to only run external fuel with no fuel filter. A full service like this one should fix any issues. Looks like the design hasn't changed a great deal from 1990 to 2007.
Hmm. I know this one runs on 100:1. Yeah it may just need a carb clean/adjustment.
Great video! Can you help me with the carburetor settings? Thanks!
Thank you! What do you need help with?
Any ideas please where the flush port is on this engine?
To my knowledge I don’t think there is a flush port on these. However you could probably make one by splicing into the water line and doing some type of quick connect.
I couldn't see a fuel filter. Wondering if you modified your fuel line.
I don’t believe it came with a fuel filter. Although now that you mention it I’m not sure. I did not modify the fuel line at all.
How can I get the coil outside the flywheel or the magneto on the lift? Mine has damaged completely and need a spare?
From my experience, remove the flywheel cover and it should just be 2 bolts holding the coil in place, with a wire attached.
Hello! Does the 4hp 2stroke have posibility to add an external fuel tank alimentation line? I saw that they don't have that conection. Is any posibility to add it?
On this outboard in particular I did not see an external tank hook up. I’m sure there are probably ways to run it but they don’t come with one built in. I think starting at 6hp+ is when they have it built in.
I've got the same motor...it takes FOREVER to get it started!
I've cleaned the carb but any other ideas to maybe get it to start on that first pull every time? On the water I look like a madman trying to get it to start!
I know the feeling! I would say if it’s taking a while to start but is eventually starting, it could be weak spark - Bad magnetos at the flywheel / fouled spark plug. If not that then possibly a fuel issue, I’d check the vent on the gas tank, and the fuel lines running to the carb for leaks.
Just saw your reply, lol. Thanks! I'll go through all that
Where did you get that socket set? Can’t find anything that will take the spark plug off
I think I got those spark plug pullers from Walmart honestly. Not the best ones, but they work, they have a 3 pack which will have one of the correct sizes for this plug.
Thank you bro! 🙏🏽 nice nice video, keep doing it, You good!
Thank you!!!
It looks brand new! I'll be doing the same thing on mine this weekend.
Thank you! Good luck, they are great motors
How’d it go? Just picked up the same engine. All seems ok but may do a general service like this. Any tips?
@@alanwilliams7695 Just follow the video. I bought parts at Crowley Marine website.
@@Hullsandwheels How do know which way to put the impeller so that it rotates the correct way?
@@kCI251 Normally what I do is put the water pump housing over the impeller, and spin the driveshaft clockwise until the impeller is inside the housing. Adding a little bit of soapy water/lubricant can help.
Great video man. Its a good instructional for me to survice mine.
Thanks
Thank you. Good luck!
Thanks man. Can I ask you what fuel/oil ratio you use? Ive heard the correct mixure is 1/100 which seems very thin to me. Just curious because yours runs like a top.
@@Dynamatt172 I wanna say it was 50:1 mixture. I think that’s pretty standard across the majority of the Yamaha 2 stoke engines!
Thanks for you time on this video. I've heard that one can change horse power simple by switching carburetor from a 4hp to 5 or 6hp any thoughts? Dose the propeller also need to be changed?
I wouldn’t say change horsepower necessarily, but by switching to a bigger mm carburetor it could potentially increase your horsepower, only slightly though. When it comes to propellers they don’t affect horsepower. You can certainly buy a higher or smaller pitch propeller depending on the needs of your boat. A smaller pitch prop will usually give you a better hole shot but slower top speed, higher pitch prop will give you slower acceleration but better top speed.
Do you fully close the choke fully or half way open when it is running? If I close the choke full, my 4 Hp Yamaha stops. Is this way that it should be? Thanks
I would have the choke on half when running and it would run good. The choke should only be fully closed when first starting it after a while. I would run it fully open or half open when running it from what I remember.
Tengo un 5 yamaha 2 tiempos y bota mucha gasolina por la bomba y al darle fuerza se apaga que puedo hacer para arreglar ese problema por favor
How many bars of compression must it have?
Depends on the motor. The cylinders should all be within 10% of each other.
Como puedo arreglar el problema que tiene mi motor fuera de borda yamaha número 5
I'm about to change the head gasket and thermostat on my 1988 mariner 4hp 2 strike 6e0 01. I believe I just need a head gasket and a inner and outer exhaust cover gasket. Does this sound right?
This sounds right yes. Also I believe there is a gasket on the cover plate for the thermostat as well. Good luck!
@@Hullsandwheels thanks. I thought the exhaust cover gaskets was the cover for the thermostat. Is their another cover under the exhaust cover? I couldn't find a gasket specifically for the thermostat in parts diagram
@@thestraitgateway Oh okay yes there is definitely a gasket for the exhaust cover. Depending on where the thermostat is there may not be a gasket for it. If you can’t find the part and there happens to be one you can possibly make one with gasket-maker.
@@Hullsandwheels I thank you for your responses. If I'm not mistaken the thermostat is under the exhaust cover
@@thestraitgateway No problem! Good luck and thanks for watching.
Great video mate.
I wanted to ask what separates the 4 stroke Yamaha 5hp and 6hp? I want the 6 but 5 is legal limit in Australia without a license.
Both same weight but obviously something is different in the 6hp making it faster. Thanks
I would say that considering both the 5 and 6 horsepowers are 1 cylinder engines, the only difference is the carburetor being a little bit bigger, allowing it to have more fuel/air in the engine. You can probably get a bigger size carb for a 5hp, and just tune it right for that engine. Hope this helps.
@@Hullsandwheels thank you I appreciate the reply. Keep the good content coming ✌🏽
@@tdr5944 Thank you! Will do.
Where did you get the prop from??
The prop was on it when I got it. I just sanded and painted it. Got a new cotter pin as well.
@@Hullsandwheels do you know where I can find one ?? I have been looking for a go minute for one and I can't find one
@@wesleykeefer5989 Maybe wholesale marine. That’s where I got the impeller for that motor.
Do you know the dimensions on the prop???
@@wesleykeefer5989 Unfortunately I do not. I sold the motor a while ago so I can’t measure either.
This video is sick
Thank you
Hey! Great video. Just bought my Yamaha 4AC, barely used by the former owner and in great condition. Yay! I’m having a problem though. When going from idle up to 10-20% speed the engine dies. Though, when going from idle up to +60% it works fine. Do you know what could be the problem? All best from Sweden
Without seeing it it’s hard to pinpoint exactly what the issue is. It’s possible it’s not getting enough fuel, I would check the lines and the jets in the carburetor. Or, it could be something as simple the choke not being set right. This has happened to me before with other low hp outboards. Hope this helps and best of luck. Thanks for watching!
@@Hullsandwheels Thanks for the quick reply! The choke is set to 0. I only had to use the choke on my former Mariner 5hp for getting the engine started, then quickly turned it off. Will experiment with it later tonight, thanks!
@@murkiburki No problem at all, best of luck!
How much water should be coming from the tell tail???
On most outboards you want a consistent stream. On these apparently it’s normal for them to sort of trickle water instead of shoot it out. As long as it’s consistently pumping water should be good.
Was that impeller bad, though?
The impeller I took out was in very good shape and could have pumped water efficiently. I bought the outboard from someone who didn’t use it in years so I just went ahead and serviced everything so it would be ready to sell again. Thank you.
What were you using to clean. Thanks for great thorough video. Don’t know year of mine yet. Headed over to pull to see if it’s interested in turning over. My 1st outboard engine. Excited to learn from great peeps like you
To clean the outboard in the beginning I was using Purple Power. It’s a very good degreaser. For the carburetor I was using carb/choke cleaner. Good luck with your outboard! Thanks for watching:)
@@Hullsandwheels it seems like the only 2 stroke engines left are found in power equipment like generator and chainsaws, even the 2 stroke oils have become a rarity nowadays
@@danteerskine7678 Yes the 2 strokes are becoming a rarity. 4 strokes are more common nowadays with the better fuel efficiency, reduced emissions, etc. Still see a good amount of 2 stroke outboards though. Reliable motors. Especially Yamaha,Mercury,Mariner,Suzuki. I have a 04 Mercury 125 2 stroke and it has been turn key every time with no issues.
👍👍
I want buy fearle used engines
great, but 90% of that maintenance wasnt needed.. like compression tests.. replacing bottom oil... impeller.. spark plug.. motor prob just runs the same after it did before.. that old impeller couldve lasted another 2-3 seasons..
I bought this motor as a project with no service history, and it was sitting for years. So therefore, a full service was necessary in my eyes. Maintenance and preventative maintenance goes a long way when it comes to outboards. Lower unit fluid is an every season replacement, and the motor did not run at all until I clean the carb, adjusted the float etc. Yes, the impeller was fine but I had already ordered it because I didn’t know the current impeller’s condition. The motor went from not running/barely starting, to first pull start every time. Thanks.
You should buy a bigger bucket!
Ha! Yes, definitely.
insufficient cooling circulation.
No. It’s normal for these motors to trickle water like that, and have what looks to be a weaker stream, even though it’s not. Water jackets were cool to the touch. Cooling was sufficient.