Mercruiser 3.0 riser and manifold inspection - need replacement?

[jeffsu350]

I just purchased a 93 bayliner with a Mercruiser 3.0 I/O. I removed the riser to inspect for corrosion. I am unsure if this is a normal amount of corrosion and I should just put a new gasket on and move on or if I should replace the manifold and riser.

Thanks for your input!

 

[alldodge]

Howdy, looks like this should be in the Mercruiser section

Your camera is a bit out of focus being its so close, but from what I can see, might just take a flat file to the surfaces, then install a new carbon gasket

 

[jeffsu350]

I do see that I posted this. Mods please move if you can.

Thanks for the response. I had trouble getting good in focus pictures.

I don't want to neglect an issue and have a bigger problem but I also don't want to replace good parts.

Thanks again!