tecumseh carb

fordguy2001

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hi i just replaced the carb on my mower. when i start mowing it sputters. so i took off the little black cap that covers the fuel jet and turned the screw just alittle and it ran alot better. but then the screw unscrewed its self from the vibration how do you keep this screw from unscrewing its self? tecumseh engine model # is ovrm120 and the new carb # 640338
 
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Rivets

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Please post the model and spec numbers for your engine so we have a better idea of what you are dealing with.
 

upupandaway

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fordguy2001

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StarTech

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That is not an adjustable part. it is a fixed idle jet screw. If unscrewing it a little resolves the problem then the jet need slightly enlarging but yu must be very careful as to not over size it.
 
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