Thermostat? Mercruiser 470

manderson1

Cadet
Joined
May 31, 2009
Messages
6
Hello all:
I am new to iboats...hope to get some help. I was given a boat from my wife's sister and as you well know nothing is free. It has a mercruiser 470...I did the basic maintenance and got the engine to run, but now the engine overheats. I know very little about boats so this is certainly a learning experience. I have replaced the impeller, housing, etc. I have pulled off the heat exchanger and there does not appear to be any flow restriction within this unit. I have a hunch it may be the thermostat, but for the life of me I can't locate it. Can someone help with this hopefully simple issue? Or where a diagram of it's location can be attained?
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: Thermostat? Mercruiser 470

What's the SN of your engine, at least a year if you don't have a SN. It could be 1 of 2 different manuals. Look up in the Adults Only sticky at the top of the forum. It will be either manual 3 or 8
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: Thermostat? Mercruiser 470

You have an 1982 470. You really need manual #3 for complete info, but it's 1.3 GB in size, manual #8 which is much smaller will also show you where the thermostat is.
 
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