Do i need a thermostat?

luv2fishN.M.

Seaman Apprentice
Joined
Mar 9, 2009
Messages
48
I have a 4.3 mercruiser. just replaced the fresh water impeller. was over heating at an idle. Not doing it any more. the problem is when i am at WOT. the temp gauge goes back and forth between 3/4 and 1/2. is this normal for these motors? i was thinking i would just remove the thermostat and see what happens? might just take a lil longer to warm up? any suggestions? thanks.
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: Do i need a thermostat?

Yes, you need a thermstat. Replace it.
 

luv2fishN.M.

Seaman Apprentice
Joined
Mar 9, 2009
Messages
48
Re: is there a certain one?

Re: is there a certain one?

is there a certain thermostat i should get? like what temp? summer? winter? 1988 4.3 mercruiser alpha one. thanks
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: is there a certain one?

Re: is there a certain one?

Merc PN 807252T1, it's a 143?.
 
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