1955 5.5 Evinrude

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Posted by Larry ( on July 27, 2005 at 18:10:37:

I have a clean 5.5 Johnson CD-12 outboard. It is running hot I think. I check it at 225 degrees at medium speed in a barrel on the exhaust housing. The head is about 125. The paint is discolored on the exhaust housing. That is why I checked the temp. Removed the head, exhaust housing, power head, and lower unit. impeller looks fine. Clean block blew air thou all. Cylinders had a little surface rust from sitting. I polished it with a buffing wheel charged with polishing compound. When it is at an idle it runs about 145 degrees.
Any Help on this? Thank you in advance Larry

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