My old 96 Sportsman 500 has developed a problem and I’m at a loss as to what’s wrong. Have tried 3 different carbs and the problem persist.

It is hard to start but will with the choke on. If you turn the choke off or try to throttle up it dies. I can make it idle faster by turning the idle screw up but if the throttle is opened or the choke opened it dies. It has a consistent spark but is more yellow then blue.

So it’s getting plenty gas and has a spark but won’t run off idle and dies quite a bit when just idling with the choke on. I’m leaning toward it being an electrical problem and would appreciate some suggestions from you fellas in the know. Thanks in advance to those who respond.

 

Have you checked the boot from the carb to the engine for cracks? Possibly try a different plug in the engine. Just an idea.