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Clean carburetor; drop jet needle clip down; clean air filter. Incorrect oil type; warped plates; weak springs.
Before diving into the service manual, let’s decode the engine code. The "152FMH" designation is standard across Chinese-made engines: 152fmh engine service manual
Drain the engine oil and remove the exhaust pipe and carburetor. Clean carburetor; drop jet needle clip down; clean
If your engine is beyond simple service, you can find a complete replacement 152FMH on sites like Motor-X or Motor-X (oil-free) . These sets often include the carburetor and necessary gaskets to get you back on the road or trail quickly. drop jet needle clip down
Remove the timing chain tensioner sealing bolt from the bottom of the engine to relieve chain tension.