Overheating at trolling speed

the_dude

Seaman
Joined
Apr 13, 2014
Messages
51
Mercury 150 2011 2 stroke

Engine overheats at trolling speed, when I get her up on plane she drops down to 107 quickly and has no issues. I put a new lower on it 3 seasons ago. I have not done an impeller since. Should I replace the impeller? Or maybe there's gunk somewhere blocking the intake?
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
49,822
always start with a new impeller.
 
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