Reply To: 67 33HP Evinrude running very hot

[Don]

OK, well being hot under the flywheel probably doesn’t mean much, there is no water cooling that area anyway.  So, from what you have said, it doesn’t really seem like the engine/block is overheating.  How far apart did you take that powerhead down to??  Sure hope you didn’t split the crankcase halves or anything like that.  I am assuming that the two powerheads look identical underneath, and that that little bleed hole in the back is present on both powerheads.  Is the powerhead currently off the exhaust housing?  If so, we need to look closer at that cavity where the powerhead sprays water into.  Perhaps manually fill that cavity with water to see where it is directed to/comes out.  Seems like it should have some weep hole(s) directing the water back into the upper portion of the exhaust housing to help cool that area.  I wish I had a similar exhaust hsg around but do not, sorry.  I am asssssuming that you have probed that bleed hole on the new powerhead and it is clear up into the cylinder water jacket.

I will PM Frank, his input would be helpful here.   D