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byoung36

Help with 518 H Not Runnig

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byoung36

I purchased a 518H yesterday an I am having trouble getting it runnig. I have check the compression I have 120 on the front cylinder an about 118 on the rear cylinder. I have cleaned the carb so I have good fuel flow. I have put in new plugs and am getting good fire. When I try to start it it will hit every now an then an back fire. I thing it could be something to do with the timing but I never messed with an onan much and don't know where to start looking or how to check. I would appreciate any help at all. Thanks Brian

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Jim_M

Make sure the flywheel key isn't sheared.

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byoung36

Thanks Jim I pulled the flywheel tonight an the key is in good shape. I believe that there is a crank sensor on this engine. how do I check to make sure that it is good or bad. Thanks Brian

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byoung36

I finally got the 518 running. The ignition rotor was not lined up with the key on the crank shaft.

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