93 johnson 15 hp , wont idle

[gunfire]

motor runs great 40 or 50 min. then wont idle and will only run at 50% or higher throttle, been to a couple shops and no luck,

 

[nwcove]

Re: 93 johnson 15 hp , wont idle

did the shops do any work? what do the plugs look like after a run a wot? ( dry and greyish, or wet and black?)

 

[gunfire]

Re: 93 johnson 15 hp , wont idle

did the shops do any work? what do the plugs look like after a run a wot? ( dry and greyish, or wet and black?)

the first shop rebult the carb. new plugs , still doing it , the se**** tryed to figure out that it could be in the electrics couldn't find the problem, after the motor sits over nite the moter will start right up run for 40 or 50 min. then start doing it again.

 

[gunfire]

Re: 93 johnson 15 hp , wont idle

something new to add, after running it till it started messing up again, ran about an 1/2 hr back to dock and pulled the 2 plugs and top plug is gray and dry, the bottem is gray and wet, the next day started up just fine ran 40 min. and started dieing again.