2 Cycle Engine Problem

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  #1  
Old 10-02-02, 10:16 AM
xiii13
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Lawn-Boy 4.5 hp 2 stroke

I've got a lawn boy lawnmower 4.5 hp 2 stroke that runs like its at idle even though it is set at full throttle. It runs fine (no missing), starts right up, but I can't get the rpm's up to where they are supposed to be. Throttle & choke work fine, brand new spark plug, seems to be getting plenty of fuel, good spark. Any clues on where to start looking?
 
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  #2  
Old 10-02-02, 09:04 PM
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Hello xiii13!

Check the governor vane at the top of the carb, under the gas tank. I bet it is stuck or hung. Otherwise, it could be running too rich, or the exhaust is restricted.
 
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Old 10-03-02, 06:16 AM
xiii13
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Thanks cheese for your quick response. I had the whole thing apart last night and found the problem. The idle mixture screw had some how loosened and was almost completely out. I guess it could of been from vibrations. Runs fine now. Will have to keep an eye out on the screw to see if it stays were its supposed to.
 
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Old 10-04-02, 12:19 AM
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Glad you got it going! I guess it WAS running too rich then, lol!
 
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