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1993 polaris trailboss no power, runs rough, and smokes


bigbulldog43

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What color is the smoke? What does it smell like? What does the spark plug look like. You could be leaking oil into the crankcase because of an improperly installed crank seal, or a leak between the case halves. Or you could be leaking water into the cylinder through the head gasket or cylinder base gasket. Make sure all your bolts and nuts are properly torqued. You could just be getting too much oil from the oil injection. Also, check your timing and flywheel key. Also, I'm not exactly sure what the compression should be, but 110 seems a little low for a fresh piston and bore, but it still shouldn't run poorly. Did you do the compression test when the motor was warm or cold?

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Black smoke usually means you are running way too rich, the fact that you say it dies when you choke it, supports that idea. You may be jetted way too rich, or you may have a clogged air cleaner. Also, I am pretty sure that machine has an oil injection system for the 2-stroke mix. Unless that system has been properly bypassed, you should not be running a pre-mix, just add oil to the oil tank and gas to the gas tank.

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