1, Pre-adjustment : NOTE : The engine must be hot. Any adjust- made with the engine cold may be when the engine is hot. Run the engine at idling speed. Put the starting handle extension into position. Unscrew the adjusting screw (1) of the clutch fork by fractions of a turn, until the starting handle extension just begins to turn but may be stopped by hand. 1408 2. Adjustment : Tighten the screw (1) by two turns.