Re: 40hp merc outboard have thermostat
Tex,<br /><br />Had this problem with my Mariner and got awsome help on this board. Turned out that I had trash in the pee hole right at the outlet. Try cleaning that first with a straightened paper clip or a pipe cleaner and see if that don't fix it.<br /><br />When did you last change the pump impeller?<br /><br />Case