470 Overheat

[dan4836]

Found my problem! After replacing just about everything, I found my thermostat is incorrect.

I researched this for weeks and found the thermostat my engine calls for matches to a Mercruiser part number that is incorrect. I put the thermostat for the newer, aluminum type manifold in my older cast iron type (first generation 470) and it worked perfect. 170 degrees at 4000 RPMs for ten minutes.

I wonder how many other people are using the incorrect thermostat in their 470 based on Mercruiser's numbers.

Now I can post about other restoration projects and maybe show some fish pictures this year!

[aussie]

Glad you found the problem will have to make sure I use the correct one Hey spares no input from you on this one

[smokeonthewater]

Spare has family things to deal with right now

[aussie]

Originally Posted by smokeonthewater

Spare has family things to deal with right now

Hope things are OK with him

[Destroyer]

Originally Posted by aussie

Hope things are OK with him

Aussie, I know you can only read and post from your phone right now, so you probably can't get to look in the "Off Topic" section. His mom died yesterday, so he will not be available for a while.

[aussie]

Man I'm sorry to hear of his loss thanks for informing me

[smokeonthewater]

I'm sorry, I didn't realize you couldn't find the thread.... It's in the last few posts of this one.

http://www.wellcraftv20.com/communit...375#post208375

[cfelton]

Glad you figured out what your problem was. My 170 heats up alittle when I run it really hard, makes me wonder if I might have a similar problem. If you can take some pictures of the thermostat you removed and the part numbers for both thermostats.