150 Johnson won't rev past 2500 rpm

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 150 Johnson won't rev past 2500 rpm

You could have a tan wire grounding out or a bad temp switch putting it in slow.
 

Paul 598

Cadet
Joined
Aug 29, 2013
Messages
17
Re: 150 Johnson won't rev past 2500 rpm

Looks like I might have a bad temp sensor.. Unplugged it and it rev'd up.. Plugged it in and it stop at 2500 rpm..
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 150 Johnson won't rev past 2500 rpm

That's probably why the wires going to the horn were cut.
 

Paul 598

Cadet
Joined
Aug 29, 2013
Messages
17
Re: 150 Johnson won't rev past 2500 rpm

Yup boobie.. But the question is why did it just now start running bad???
 
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