Peephole stream stops after running full throttle?

step2jimi

Cadet
Joined
Mar 6, 2012
Messages
10
I have a 92 60hp Johnson that runs fine but all of a sudden after running full throttle for a while the pre stream stops. If I pull of the throttle it will come back. Any ideas?
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
39,717
Have you installed a new impeller ?-------------Do you know how old your impeller is ?-------------Has the tell tale hose been moved from side of the block to the top as per a service bulletin in 1994 ?-----What type of boat is the motor on ?
 

step2jimi

Cadet
Joined
Mar 6, 2012
Messages
10
Impeller done two years ago. I'll check the house placenent. Bass tracker pro team 175
 

step2jimi

Cadet
Joined
Mar 6, 2012
Messages
10
The stream is strong when the boat starts and strong for a minute or two at full throttle then just stops. As soon as i slow down it starts again.
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
39,717
What is the height of the transom ?----Does it change the same if motor is trimmed down a bit ?------Sounds to me that it could be sucking air into the water intake.------Bad / expensive things can happen.-------Have you tested the overheat horn ??
 

step2jimi

Cadet
Joined
Mar 6, 2012
Messages
10
Overheat horn works, that's what told me this was happening. It's all of a sudden. Run the boat every weekend for 3 years and this started last weekend out of nowere. Did run the big motor through some milfoil is it possible I clogged the intake?
 

Crosbyman

Admiral
Joined
Nov 5, 2006
Messages
6,181
sounds also like intermittent blockage...time to recheck the impeller for any broken flaps or missing parts

​it was good when new .....but it ain't new no more.
 
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