Anyone running classic (old) two cycle outboards?

[SonofaBoomer]

Just acquired a '93 Johnson J15. Starts first pull and has about 115 psi on both cylinders after a few.pulls. Drained the tank and I am adding a quicksilver fuel filter before the fuel pump. I probably will use the pennzoil semi synthetic tcw3 at a 50:1 mix and switch to NGK plugs. Looking forward to getting on the water.

 

[Bwalker]

Yamalube has a lot of moly which is a high pressure lube that doesn’t burn easily and will cause carbon buildup. If you do what Yamaha suggest and use Yamaha Ring free in every tank of fuel you will not have a problem. That stuff is some of the best that I have ever used to clean carbon out of a motor, and have had nothing but good out Yamalube and ring free. On a HPDI no matter what oil you use, you had better use ring free or a decarbing agent or the carbon would jack the rings out and catch on a port, and rip the ring lands off of a piston, and then you had a pile of scrap metal. I don’t remember which cylinder that it would normally happen to, but there is one that normally it happened to. I personally never was a fan of the HPDI’s because of that.

I owned and operated a Canadian fishing lodge with a fleet of Yamaha two cycle outboards. We always used Yamalube and never had any issues of any sort. Never used decarbing agents. We would run the sparkplugs for one season snd then change. Not because they were fouled, but because the ground strap was eroded from use. They always looked good.
These motors had more hours put on them in a season the most guys put on one in a lifetime.

 

[robbobster]

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[SonofaBoomer]

I owned and operated a Canadian fishing lodge with a fleet of Yamaha two cycle outboards. We always used Yamalube and never had any issues of any sort. Never used decarbing agents. We would run the sparkplugs for one season snd then change. Not because they were fouled, but because the ground strap was eroded from use. They always looked good.
These motors had more hours put on them in a season the most guys put on one in a lifetime.

Nice! Just curious, what year and models were the outboards? What ratio did you run them at?

 

[dja4260]

My father gave me this 14'ft 1951 aluminum boat along with a 1972 Evinrude 25hp 2 stroke. The motor is clean and runs great! It's a sweet little ride.

 

[Bwalker]

Nice! Just curious, what year and models were the outboards? What ratio did you run them at?

Various years from 2003-2008. 90hp 70hp 30hp 3 cyl, 25hp, 15, 9.9, 8, 6 off tge top of my head. The largest number being 25hp models.
We ran one a bulk tank with 50:1 mix. The injected models got 50:1 and oil injection.
We ran all tge camps for cycle stuff on the same mixed fuel too.

 

[SonofaBoomer]

My father gave me this 14'ft 1951 aluminum boat along with a 1972 Evinrude 25hp 2 stroke. The motor is clean and runs great! It's a sweet little ride.

View attachment 339948

View attachment 339949

Awesome!

Various years from 2003-2008. 90hp 70hp 30hp 3 cyl, 25hp, 15, 9.9, 8, 6 off tge top of my head. The largest number being 25hp models.
We ran one a bulk tank with 50:1 mix. The injected models got 50:1 and oil injection.
We ran all tge camps for cycle stuff on the same mixed fuel too.

Very nice, I just got a 2 stroke '94 15 HP Johnson. I drained the tank, put fresh rec90 with 50:1 pennzoil. Cleaned the carb, new NGK plugs and put a new fuel filter. Runs great WOT, medium, and medium low speeds but has trouble idling under load. I've got it running good in a test tank but whenever I get on the water it stalls at low speed/idle. Real irritating especially when trying to launch or tie up.