By following this manual and keeping up with fluid changes and valve adjustments, your 152FMH engine will deliver years of dependable operation. Always use high-quality replacement gaskets and verify electrical connections if encountering unexpected starting issues.
Set the engine to TDC (align "T" mark on flywheel). Ensure the circle mark on the cam sprocket points directly forward, aligning with the notch on the cylinder head housing.
Wet, multi-plate (Available in manual or automatic centrifugal variants)
Gently tap the cylinder head with a rubber mallet to break the gasket seal and slide it off the cylinder studs. 152fmh engine service manual
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Complete Service and Maintenance Guide for the 152FMH Engine By following this manual and keeping up with
Place a drain pan under the engine. Look for the 17mm bolt located squarely on the bottom of the engine case. Warning: Do not accidentally remove the angled 14mm bolt, which houses the timing chain tensioner spring.
Slide the cylinder block off the piston. Immediately stuff a clean rag into the crankcase opening around the connecting rod to prevent parts from falling inside.
Rotate the flywheel counter-clockwise using a socket on the crankshaft nut. Align the "T" mark on the flywheel with the index notch on the crankcase. Ensure the circle mark on the cam sprocket
Re-check the clearance after tightening to ensure the pin did not rotate. Repeat for both intake (top) and exhaust (bottom) valves. 4. Fuel System & Carburetor Tuning
Base setting is 1.5 to 2 full turns out from lightly seated. Cleaning and Tuning Steps