1974 Johnson 85hp thermostat

[guest]

Where is the thermostat on my 1974 85hp Johnson and how difficult is it to replace?

 

[Vic.S]

Re: 1974 Johnson 85hp thermostat

Answering because nobody else has.

Find your engine in the BRP parts catalog at "http://epc.brp.com/default.aspx?brands=ej&lang=e" Look at the diagram for the exhaust housing. Near the top left hand corner you'll see #51 the thermostat housing.

But there are no parts called "themostat" but #48 and #53 are called Vernatherm and Vernatherm valve Must be what it has as a thermostat.

Dont know how easy or difficult it is to get at or what these bits are exactly.

Perhaps someone else will help now.

 

[F_R]

Re: 1974 Johnson 85hp thermostat

To expand on what was just said, look for a thick hose coming off the bottom of each cylinder head. Those hoses go to a squarish box--the thermostat housing. Remove the hoses, take out the two screws and remove the thermostat housing. The brass thing you will find inside is the vernatherm -- fancy name for thermostat. There is also a plastic valve in there. And there is a pin in the small end of the vernatherm -- don't lose it.

I'm not sure, but you might have to remove the lower cowling cover to get at the two housing screws. You'll know when you look at it.