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WallyGator12000

'96 mercury 9.9 4 stroke- lots of smoke after switch to amsoil?

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Hey guys,

Just changed the oil on my 1996 mercury 9.9 four stroke I bought a few weeks ago. The oil was quite dirty. I bought Amsoil AFF 0W-40, specifically for four stroke engines. Now I am getting a lot of smoke, before I changed the oil I wasn't getting much at all. The old oil was four stroke, but petroleum. The motor is running nice, and I have checked the dip stick and my oil level seems fine (can be tough to read with how clear amsoil seems). But I put 1 quart in, which is about how much came out.

I am hoping it is just the old oil burning off, but want some opinions, any thoughts? Did I do something wrong?

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Amsoil makes a 4 stroke 10w-40 Marine oil. Maybe the 0w-40 is too thin?

Did you lay it down at all by any chance?

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Never laid it down or tilted the motor while changing the oil, it stayed on the transom like always. I may try to switch to the 10W-40, do you guys think I should do that right away, or should I try running the motor for a trip or two and seeing how it performs or if the smoke clears up?

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