1990 Johnson Engine 60 HP Hesitates/Sputters

[mylangrace]

1990 Johnson Engine 60 HP Hesitates/Sputters<br /><br />When we run our engine full throttle it runs okay for afew minutes but then begins to hesitate/sputter. If we lower the speed and just troll, it stops. If we turn the engine off for a few minutes, and then start it back up, it will be okay for a while then start to sputter.<br /><br />The water pump, coil pack, spark plugs and gas has been changed. The mechanic says the carberautor (sp?) has is okay.<br /><br />Any suggestions will be appreciated!!!!!!

 

[JB]

Re: 1990 Johnson Engine 60 HP Hesitates/Sputters

What happens if you squeeze the primer bulb while it is misbehaving? Sounds to me like fuel starvation that may be related to tank ventilation or air leaking in a hose somewhere.<br /><br />Another possibility is temperature related, try a test run with the Tstat out.<br /><br />Good luck.<br />JB

 

[mylangrace]

Re: 1990 Johnson Engine 60 HP Hesitates/Sputters

J.B.<br /><br />We tried priming bubble, it was really hard but it didn't make any difference.<br /><br />What do you mean when you say leave Tstat out?<br /><br />Thanks.