I have a 2011 Polaris 550 that is backfiring but will not start. Looking for suggestions on what I need to troubleshoot. Already put in a new plug. Anyone know how do you check the timing and what valve adjustment should be?
Same with my 2010 550 XP. Dealer said Bad Gas. Put a bottle of HEAT (red) in tank. Mine will start by feathering the throttle. After warm-up it runs and restarts fine. Will add SeaFoam to next tank.
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