smoking

[yomonk1]

I've got an 85 Yammie 115hp (115ETLK) thst runs very very nicely so far. My only issue is that it smokes quite a bit. I'm using Mercury 2cycle oil at 50:1 and can't really think of any other issues. Any ideas?

[gamblerOH]

IF you are premixing it will smoke. An engine only requires 50:1 at full throttle. At idle an oil injected engine is getting more like 100:1 and it goes up as the rpms go up. More rpms more oil. Too bad theres no other way to adjust your oil but 50:1 is the only safe way to premix. If it is still smoking at full throttle then I would guess you may have more serious problems, but lets hope not!!

[yomonk1]

So there's really no way around it at idle? Does one oil smoke less than another?

[gamblerOH]

I'm not sure about one oil smoking less than the other but I really wouldnt worry about it just make sure you are using good marine grade oil.

[Rattlinrogue]

I run a Yamaha too.While breaking it in ,I was told to go 50:1 and it smoked like a tar keel.After the break in period ,I'm now going with 100:1 ,and the smoking has all but disappeared.