Yamaluble 2W vs 2M

[jake1967]

I didn't pay close enough attention yesterday and purchased Yamalube 2W instead of 2M. I know the difference between the two... I added approximately 8-10 ozs max to my reservoir on my 2002 90HP 2 stroke. Will this hurt my engine? I really didn't notice until I looked at the jug after I returned from a day on the water.
Should I drain the reservoir and do any thing else?
Thanks in advance, Jake

[dorf]

For what it is worth...a long time ago I did the same thing on a 2 stroke motorcycle(used auto oil by mistake)...it ran fine until the deposits in the oil shorted out the spark plugs and thus shut down the engine.

Your situation ..is sort of a crap shoot

I'd drain and refill.