How do my risers and manifolds look?

My port engine was overheating slightly, figured it was time to replace the manifolds and risers as I haven't done it in the 2 years I've owned it, and previous owner (3 years) hadn't done them.

Once I cleaned out the gunk, this is what they look like:

Seems like there isn't any significant corrosion, I was able to push compressed air through em and all the ports, and look like the original shape of the ports is still pretty good. Good enough for another year?


  • manifolds.jpg
    658 KB · Views: 5
  • risers.jpg
    668 KB · Views: 5
I'll be cleaning up the mating surfaces and repainting the outsides before reinstalling, that was just a quick cleanup of the insides.


Well-known member
Gold Site Supporter
Good question Phillbo.
I'm Great Lakes,1900 + hrs., mine have never been cleaned.
And by the way, they look great.