Have a 2012 XUV 550, 150 hours as of now. Took it to the dealer when it was still under warranty as it was backfiring and not running right, they put in new plugs. Since early 2013 I have put two more sets of plugs in it then took it back to the dealer last week, got it back today and they had put another set in it. I asked why it was going through plugs and he said he had no idea. They checked the spark output and it was fine. He had absolutely no idea and neither do I nor a couple other small engine people I know who looked at it. Anyone else out there have a clue? Thanks.:D I should add that I only use premium fuel with no ethanol and put seafoam in along with a shot of two cycle oil once in a while. It runs great for a bit after the new pugs then starts all over again. Run the crap out of it too and that seems to clean it up after a bit.
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