Yamaha Model 2SH, 2 hp, gas oil mix ??

[curious-jarhead]

Model 2SH, perhaps 1987 model. Info is scarce and I’m trying to find out what the gas to oil ratio should be for it. Thanks!

[retiredoz]

My (aftermarket) says 100:1, but with the suggestion to use Yamalube 100:1 oil. If that’s not available, I’d run 50:1

[curious-jarhead]

Thanks!

[larkbill]

The dealer will tell you never to run anything but Yamalube at 100/1 or your engine will explode. But then turn around and tell you to run it at 25/1 during break-in. I have run my 2001 5 hp on regular TC-W3 at 50/1 forever. I use it as a kicker and want it ‘s tank to serve as reserve fuel for my ’66 Merc 20 hp. main engine. I wouldn’t be afraid to run any TC-W3 at 50/1.

[amuller]

I would run it at 50:1 This is pretty much the industry standard for pre-mix 2-strokes and has been for quite a while. At 100:1 you are on the edge….

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