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Mag side fouling plugs

Discussion in 'Rush/Switchback' started by Brian Yenser, Feb 21, 2021.

  1. Brian Yenser

    Brian Yenser New Member

    Messages:
    2
    Location:
    Pa
    Country:
    USA
    Years Snowmobiling:
    15
    Snowmobile:
    17 polaris sb pro-s 600
    I have a 17 sb pro s 600 3200 miles runs great but been fouling mag side plugs. Will go 200 miles strong all day turn next morning foul a plug warming up. Comp is 115 both cly. I’m lost in what it could be like I said it runs hard and strong. Injector? Seal? Coil? Maybe just some sea foam ?
     
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  3. Rbell14

    Rbell14 Member

    Messages:
    96
    Location:
    Plymouth, Mi
    Country:
    USA
    Years Snowmobiling:
    10
    Snowmobile:
    2021 Indy VR1 850
    2016 Rush Pro S 600
    I'm experiencing some issues on a similar sled, just curious once the plug is fouled I assume it's obvious with one cylinder firing. Mine seems to idle and run good but seems like it's missing some top end power. Don't think it's a plug, suspect my exhaust valves need to be cleaned.

    Your plug only foul out while warming up?
     
  4. Brian Yenser

    Brian Yenser New Member

    Messages:
    2
    Location:
    Pa
    Country:
    USA
    Years Snowmobiling:
    15
    Snowmobile:
    17 polaris sb pro-s 600
    Mostly on warm up when I go to pull out of camp it could mag side I replace plugs runs good all day then when cold again it does it again. Idk. It had fouled in middle of a ride already also but only once.
     
  5. 850Switchback

    850Switchback Member

    Messages:
    49
    Location:
    CT
    Country:
    USA
    Years Snowmobiling:
    30
    Snowmobile:
    2020 Switchback XCR
    I would start by running some sea foam or K100 through it, could just be a crappy spray from that injector not atomizing the fuel.
     

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