Run away Polaris 250

Jim Olsen

New Member
Jun 5, 2016
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I am quite experienced with these machines. Owned 7 rebuilt 9 Raced them an a Magnum 425.
Here's the problem. Rebuilt a motor in a machine I've never heard run. Starts with the pull starter but doesn't want to settle down to an idle. I've been thru the carb replaced the throttle cable checked everything I can think of. It starts and keeps racing like a runaway diesel Key will not kill it engine stop will not kill it. Will only shut down if you choke it to death. I eliminated the oil feed and premix the gas. Before you ask yes I did block off the oil injection on the cylinder. I do this with all my Polaris two strokes because the oil pump is prone to failure.

Any Ideas ?