1994 johnson fast strike 150 HP

Eric Johnson

Cadet
Joined
Apr 29, 2013
Messages
6
Engine bogs down/ shuts down on plane. When at idle runs fine. Felt the primer bulb while running did not feel much gas going thru the bulb, Bulb is not hard or soft when ruuning, somewhere in the middle. how firm should the bulb be when running? Have NGK plugs in it right now will change to champions next. Where is the fuel seperator located? will try that also, along with spraying the carbs. What should I use? I have Sea foam in gas now, not sure if it went thru motor as of yet though. In other words Help!!!!!!!!
 

Bosunsmate

Admiral
Joined
Apr 7, 2012
Messages
6,129
Re: 1994 johnson fast strike 150 HP

Somewhere in between is normal on mine.
try pumping it on the plane to see if that helps, could be fuel pump failing
turn motor off and pump bulb check it stays firm for a few minutes
 

Eric Johnson

Cadet
Joined
Apr 29, 2013
Messages
6
Re: 1994 johnson fast strike 150 HP

Took the boat out yesterday, same problems as before, Sprayed sea foam in carbs for the first time in 10 years of owning the boat, did not smoke that much after application. After start up runs fine 1/4 throttel ok after that KAPUT. I have to wait awhile to re start. TOP 5 THINGS I SHOULD CHECK NEXT AND IN ORDER OF IMPORTANCE. spark plugs are next to change.
 
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