Only two plugs keep fouling? Why only two?

[samm835]

I am looking into buying a used Force motor, the motor has 140 compression across the board...but after a short while the top two plugs will foul. Can someone give me a little insight on why it would keep fouling the same two plugs? Thanks

 

[foodfisher]

Re: Only two plugs keep fouling? Why only two?

If it's a 4 cylinder, two are fed by one carb. It may be set a little rich. Force have a tendancy to foul plugs normally. The other carb may be set too lean.

 

[moparman]

Re: Only two plugs keep fouling? Why only two?

how does your spark look? You might have a problem with one of the boxes that control your ignition, or as foodfisher said you might have carb problems. My 1988 125 1254x8c started loosing a box and if I remember correctly it allowed the bottom two cylinders to foul real easy.Just a thought that you might check out[the spark] moparman