15 hp jonhson idle problem

[allison]

I have an 1993 15 hp johnson. It starts and runs great at all speeds except idle. It kills when idling and then I have to choke it to get it going again even after it's warm. What could it be??

 

[tashasdaddy]

Re: 15 hp jonhson idle problem

either not firing on one plug. or a dirty carb, low speed jet clogged. http://forums.iboats.com/showthread.php?t=244013

 

[allison]

Re: 15 hp jonhson idle problem

Would it still run as good as it does (full and slower speeds) if it were running on one plug?

 

[CATransplant]

Re: 15 hp jonhson idle problem

Does it die only when in gear in the water, or anytime you go to idle speed?

It may be nothing more than an idle speed adjustment, really. Lots of folks expect their engines to idle too slowly, or set the idle speed in neutral. For best results, you have to set the idle speed with the engine in water and in Forward.

However, since you say you have to choke it to restart it, I suspect a dirty low speed jet.