90 hp evinrude repair

[lakebound88]

Well, I took on a job for a family friend. Complained of boat overheating last year, but had a good pee stream from tell tale while running. First, remove lower unit and found a good impeller.

Which is surprising for a motor that sat for 8 years, indoors though, oil was brand new looking. Motor ran good he said, after a brief diagnosis I removed the t-stat unit to find the stats corroded and stuck shut, at idle the bypass allowed enough water flow but under load the stats never opened resulting in high temps. The motor was never hurt and is all set. I got the parts online fairly cheap. OEM as well.

The passage was also plugged from the head to the T stat housing. Flushed motor out and ran without stats installed. clean flow.

Assembled with new parts and ran. Nice and cool now.

This task is definitely a somewhat easy task. For a do it yourselfer.

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[lrg355]

I had a 115 Johnson (93) that appeared to stop pumping.  I pulled the pump and found it to be good.  It turned out to be the fitting thru the case at the "pee hole" was plugged.  It is smaller than the tube to it.  A lot of work for nothing.  After that , always poked a wire into it when it stopped.  All Johnny-Rude owners should be aware of this , especially running in weedy areas.

[lakebound88]

When we had our kicker motor. I always kept a piece of weed eater string to poke in the pee hole. Broke that wasp nest up every time

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