Polaris slx1050 1999 , back fireing !!! - PWC Forum: The best hang-out for Personal WaterCraft enthusiasts

badboy115 · 01-15-2012, 10:57 AM

hi folks can anybody help me , I have a 1999 Polaris slx 1050 , I went to start it today and it was hard to start, checked plugs and was sparking away so i put them back in , when it did start it was back firing ?? , i stopped and started it a few times and it continued to back fire and would not pick up revs .........anybody got any ideas ???

Ernest T · 01-15-2012, 01:57 PM

Backfiring is usually a timing problem or carb/reed problem. I'd check the carbs/reeds first. I'm not familiar with the carb on a Polaris, but on other skis a broken reed, or malfunctioning check valve are frequent causes for the ski to backfire.

badboy115 · 01-15-2012, 02:24 PM

thanks for that will check it tomorrow

badboy115 · 01-16-2012, 02:26 PM

well i checked my reeds / carbs tonight and all seems in good order , where do i go from here ????........help

98yota · 01-17-2012, 10:12 PM

Check your battery voltage with a voltmeter, low voltage causing problems with Polaris' is really common. Check all connections for corrosion.

badboy115 · 01-18-2012, 04:06 AM

I have replaced the battery last week and spark plugs , i have also been told it could be down my stator ???

Ernest T · 01-18-2012, 02:55 PM

Sorry, I don't know enough about Polaris skis, but on other skis you can shear the flywheel key and throw off the timing, which will cause the backfire or not start at all. Or it could be a problem with the voltage output from the stator. If that is the problem, you will have to pull the engine to check it. This problem is more rare than a problem with the carb(s), but very possible. If you have a service manual for your ski, it probably shows how to check the output voltage from the stator. That would tell you if that is the problem or not.

If its been a while since the carbs. were cleaned or rebuilt, I'd do that as a frist step. Backfiring can occur from both lean and too rich settings, and carb related problems causing changes in fuel flow are probably the biggest cause.