It is a 1995 250 cc Quad Runner LT-4WD. Next to it I have a 1992 280 cc King Quad LT-4WDX. The two machines are nearly identical. The machine I having the trouble with is the 1992 LT-4WD. Only difference between the two fuel systems is the 1995 has a vacuum-fuel shut- off in the gas-tank fuel-valve. The 1992 does not. Both use the same - what Suzuki calls -a "vacuum" fuel pump. I still do not know how it is supposed to work. Steady vacuum doesn't make it work. If it takes a crankcase pulse - I have no idea how it gets that from a tap near the intake manifold on the carb.
I am tempted to make a crankcase tap somewhere for a pulse-line. But these things worked once. I'd like to know how. No description of it in the Suzuki manual.
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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