1999 Johnson 8hp runs 10 min & dies

zippy2

Recruit
Joined
Aug 14, 2005
Messages
2
My 1999 Johnson 8hp starts fine, runs for 10 min at full throttle then dies. It will not restart for about 10 min. It has done this 4 times. The last time it began to die, I started pumping the gas line bulb. It still died but it wound down about 5 second longer before it completely died. I replaced the plugs and changed the gear oil after the first incident. I was thinking electrical problem until this bulb pumping seemed to have some limited effect. Thanks for any ideas on my problem.
 

almost retired again

Chief Petty Officer
Joined
Feb 9, 2002
Messages
438
Re: 1999 Johnson 8hp runs 10 min & dies

Hello Ztppy;<br />It sounds like the engine is overheating, check to see if it's getting hot.
 

zippy2

Recruit
Joined
Aug 14, 2005
Messages
2
Re: 1999 Johnson 8hp runs 10 min & dies

The cooling water return is flowing, so I assume that it is not overheating.
 

Vic.S

Rear Admiral
Joined
May 4, 2004
Messages
4,719
Re: 1999 Johnson 8hp runs 10 min & dies

Fuel tank vent blocked. Take the cap off and see if it runs.
 
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