Very well done with good information, you put many marine mechanics to shame. Have a 70 HP Yamaha with the same vintage as above and I have learned LOTS.......THANKYOU keep up the good work
Yamaha HPDI has a small electric oil pump for the VST, but is has an oil pump like yours as well, where it sends oil to the intake manifold. I primed each line to the intake manually.
Been following this series. I have a 2006 1720 with an Etec 90. Every 2 or 3 trips I top off the fuel. It’s only a 30 ish gallon tank, but every other trip or so I add some 2 stroke oil to the raw gas. I have never had a fouling issue and it doesn’t smoke at all. Probably about an ounce or less. I have been doing that since 2017 and it runs like a top. Plenty of wide open throttle runs.
One thing to check when an outboard has been sitting for a long time is the one way valve on each line after the pump. They like to clog, make sure they are letting oil through, I highly suggest to change them. Ask me how I know 😂
I recently rebuilt my 1989 90hp and my oiling system is giving less oil than before (like 75:1). I adjusted the linkage arm to specs and nothing is changing. Should I just take it off?
Very well done with good information, you put many marine mechanics to shame. Have a 70 HP Yamaha with the same vintage as above and I have learned LOTS.......THANKYOU keep up the good work
I’m just getting a 1996 Yamaha 90 hp 2 stroke rebuilt, its by far my favourite motor that Yamaha has made
I’m really liking the frequency of uploads sir, you videos definitely have helped me troubleshoot my boat
Glad you like them!
Yamaha HPDI has a small electric oil pump for the VST, but is has an oil pump like yours as well, where it sends oil to the intake manifold. I primed each line to the intake manually.
If you can get a piece of tubing to fit onto the bleeder in a vertical position, you can watch the air bubbles in the tubing.
Been following this series. I have a 2006 1720 with an Etec 90. Every 2 or 3 trips I top off the fuel. It’s only a 30 ish gallon tank, but every other trip or so I add some 2 stroke oil to the raw gas. I have never had a fouling issue and it doesn’t smoke at all. Probably about an ounce or less. I have been doing that since 2017 and it runs like a top. Plenty of wide open throttle runs.
Thank you, my brother, for this distinguished work. Thank you very much and more than that ❤❤❤❤
You are very welcome
Can you please do a video on zerk fittings? I own a 2005 90 TLRD and having some issues with the steering tube zerk fitting.
Good suggestion.
that design looks a lot like my Suzuki DT140... Great tip! Thanks for sharing!
One thing to check when an outboard has been sitting for a long time is the one way valve on each line after the pump. They like to clog, make sure they are letting oil through, I highly suggest to change them. Ask me how I know 😂
Great point!
Gotta love a Yammy two stroke.....back when things were half way simple.
I recently rebuilt my 1989 90hp and my oiling system is giving less oil than before (like 75:1). I adjusted the linkage arm to specs and nothing is changing. Should I just take it off?
2003 250 HPDI is it possible and do you recommend eliminating oil system and run premix to eliminate that point of failure on an old engine ?
Have a 06 90 I just bought.
It has the oiling system deleted unfortunately.
I’d like to have it reinstalled I hate premixing.
I have a love hate relationship with my 85, but yeah they're nice engines
That engine doesn’t sound healthy it may be fuel or air but sound weak. I have had many 90 2 strokes
I never trust any 2stroke oil system, best just to pre mix it