Thread subject: Whaler Central - Boston Whaler Boat Information and Photos :: Help! Can't find my thermostat - Yamaha 90

Posted by dmrose on 07/24/09 - 3:19 PM
#1
1985 Yamaha 90hp

I'm attempting to replace the thermostat in my motor and have consulted Clymers and Seloc manuals but can't find the references match up to what I am seeing on my motor. Any ideas, thanks!

D
Edited by Phil T on 07/24/09 - 3:40 PM

Posted by RevengeFamily on 07/24/09 - 7:07 PM
#2
At the top of your cylinder head is a small cover, that's the thermastat housing. I believe there should be 4 bolts holding the cover on.

Good luck,

Norm

Posted by joninnj on 07/24/09 - 9:53 PM
#3
Norm is right it on the very top of the cylinder head. It may be triangular shaped though, cant what remember mine looks like. But they are basically the same year after year. Very easy to replace if the bolts are not frozen. attached is a link to the Yamaha forum (free, you will need sign up if you want to post) and a link to the parts diagram.

http://www.yamahaoutboardparts.com/fo...om/forum2/

http://www.boats.net/parts/search/Yam...parts.html