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 Topic: Tech-TipsThe new items published under this topic are as follows.
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Over the years I’ve heard of several ways to deal with fouled spark plugs. The most sure-fire way to eliminate the problem is to buy a four-stroke. However, for many that’s not an option. So with that in mind here’s a couple of other tips:
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Carburetor fuel circuits and functions:
1) Pilot jet/slow jet - Affects mixture from idle to 1/3 throttle opening. The pilot jet meters fuel to the "bottom end circuits"
2) Air screw - Meters air to pilot jet. It is usually located near the back or air box side of the carb. Turning in clockwise, will richen the pilot mixture. Turning out, counter clockwise, will lean out the pilot mixture. Average setting for most 2 strokes is 1 to 2 1/2 turns out. Refer to owner's manual.
Note: If the adjustment screw is in the front of the carb, it is a fuel screw and not an air screw; it is adjusted the opposite of the air screw. Most 4-strokes are this way.
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