Author Topic: Plug Fouling  (Read 335 times)

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mswyka

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Plug Fouling
« on: March 27, 2018, 11:31:08 AM »
This past Saturday we ran with another pair of Ski-Doo sleds a 500 and a 370 - both fan cooled.  The 500 fouled the PTO side plug twice during the day.  We have not had much problem with fouling plugs on our sleds so I was hoping for some insight for why that might have been a recurring issue on that sled.  Plug was NGK BR9 EYA, temps in the mid 30s, non-ethanol fuel.  Sled has single 36 or 38 mm Mikuni carb non-powerjet.
Intruders:  1978, 1979, 1980, 1981 Custom
Invaders:  1979 340, 1980 440, 1980 440 TOC Custom
Projects:  1979 Invader 340, 1980 Invader 340, 1979 Intruder 440, 1982 Intruder 440, 1980 Drifter 340 F/C, 1972 Panther 303 ...

gixxer6

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Re: Plug Fouling
« Reply #1 on: March 27, 2018, 02:09:21 PM »
Low compression on the PTO side?