152fmh Engine Service Manual _hot_ Access

Remove the four M8 copper and steel nuts from the front cylinder head face. Remove the single M6 side retention bolt holding the cylinder head to the cylinder block.

However, all is not lost. The 152FMH's fundamental design is a near-perfect copy of the Honda CG125. For nearly all maintenance and repair procedures, and serves as the definitive guide. The only meaningful differences between the engine families are cosmetic, such as the orientation of the cylinder (horizontal vs. vertical) and the details of the external wiring harness.

NGK C7HSA or Tor扩 A7TC (Gap: 0.6mm – 0.7mm / 0.024" – 0.028") 152fmh engine service manual

Remove the float bowl screws from the bottom of the carburetor. Pull out the float pin, float, and needle valve.

With the engine warm, adjust the idle screw so it runs smoothly without dying, and adjust the air/fuel mixture screw (usually 1.5 to 2.5 turns out from lightly seated). 4. 152FMH Troubleshooting Guide Remove the four M8 copper and steel nuts

Loose valves cause excessive noise and power loss, while tight valves can burn out and cause compression loss. Always adjust valves when the engine is completely cold.

Rotate the flywheel counterclockwise using a T-handle or socket until the aligns with the index notch on the case. The 152FMH's fundamental design is a near-perfect copy

Regular maintenance is critical for these engines, as they often rely on simple rather than replaceable paper ones.

Check the level; do not screw the dipstick in when checking. Valve Clearance Adjustment

Ensure the fuel valve is open. Loosen the drain screw at the bottom of the carburetor bowl to verify fuel is entering the chamber. If dry, check for a blocked fuel filter or stuck float needle.

Horizontal, Single-Cylinder, 4-Stroke, Air-Cooled Displacement: 107cc (commonly referred to as 110cc) Bore x Stroke: 52.4 mm x 49.5 mm Compression Ratio: 9.1:1 Cooling System: Natural Air Cooling Ignition Type: CDI (Capacitor Discharge Ignition)