2000 150hp john carb model

[p.longbehn]

i HAVE A 2000 150HP JOHNSON CARBORATED MODEL. I SEEM TO BE HAVEING TROUBLE<br />WITH IT AFTER IT IS STARTED AND I TRY TO GET INTO THE THRODDLE. I NEED TO<br />CHOKE IT TO GET IT TO GET GOING BUT AFTER I HEAR IT CATCH I DON'T NEED TO<br />CHOKE IT AND IT RUNS FINE. I ALSO NEED TO BUMP THE CHOKE WHEN IDLING THROUGH<br />A NO WAKE ZONE OR IT WILL KILL. IT STARTS GOOD RUNS VERY GOOD AT ALL OTHER<br />RANGES. I THEN NEED TO USE THE CHOKE TO LOAD IT ON THE TRAILER WHEN DONE, I<br />NEED TO HOLD THE CHOKE TO START IT ONTO THE TRAILER BUT THEN CATCHES AND IS<br />FINE. I HAVE DONE A COMPLETE TUNE UP AND OLD PLUGS APPEARED TO HAVE BEEN<br />RUNNING QUITE WELL.

 

[DJ]

Re: 2000 150hp john carb model

Bubba,<br /><br />My guess is that you have a fuel problem..<br /><br />If the engine seems to perform OK off of idle, I would say that you have carburetor idle circuit issues.

 

[jim dozier]

Re: 2000 150hp john carb model

Choking it to cold start is not unusual but any need to choke it after it has warmed up is an indication that the engine is running lean at least on the idle circuit. I agree with djohns. The most likely culprit is just gummy deposits in the idle jets and a THOROUGH carb rebuild/cleaning (removal, disassembly, cleaning, rebuild kit) is probably in order.