1990 Stingray 4.3 mercrusier

[Plainolelow]

Hey guys.

My buddy is doing all the maintanence to his boat.

Can someone tell me what would be the best oil and how much for this motor?

Also is the Seloc Online manual a good thing or is there something better?
Thanks

 

[Don S]

Re: 1990 Stingray 4.3 mercrusier

If you want good accurate information, need a Mercruiser manual, not some aftermarket thing. For you engine, you would need manual #7

Here is a copy of the Mercruiser service bulletin on oil recommendations.