No Thermostat ?? Is it possible ??

[JohnnyS]

87' 150 BlackMax<br />Been having occassional alarm go off. So I started doing some investigation. I bought this boat used, and it runs fine usually except for the alarm kicking in sporadically.<br /><br />The impeller kit was replaced this spring, and I'm getting a solid stream of water from the pee hole.<br /><br />I pulled the cover plate for the starboard side thermostat - and no thermostat only a rubber gasket in need of replacing. So I figured its only supposed to have one thermostat and opened the port side. Again no thermostat (yes another gasket looks shot).<br /><br />Does that make sense? Should there be any thermostats on this motor? <br /><br />Thanks <br />John

 

[JohnnyS]

Re: No Thermostat ?? Is it possible ??

 

[Valv]

Re: No Thermostat ?? Is it possible ??

I am no technician, but looking and parts diagram for your motor and there is 1 thermostat on each head, part # 75692

 

[profish]

Re: No Thermostat ?? Is it possible ??

The previous owner probably took them out they are 5 bucks a piece. You need to put them back in because the variation in temperature in the heads will warp them and that’s a bad thing.

 

[JohnnyS]

Re: No Thermostat ?? Is it possible ??

Thanks.<br /><br />I just picked 2 up t-stats. While there, the guy at the parts store asked me if I checked the poppet valve. Since I didn't know what one was up to that point, I said no. Since this is an 87' and everything on is orig , I figure it needs checking/replacing . <br /><br />Book shows 2 styles one with 2 bolts, another with 4. Since I was not sure I did not buy the poppet yet.