Resetting the Timing

The timing must be reset if the crankshaft and/or cam gear has been
disassembled. To reset the timing, rotate the crankshaft until the piston is
at top-dead center. (Verify this by looking through the glow plug hole.)
With the piston at top-dead center, install the cam gear with the small
punch mark facing toward you and pointing straight down toward the bottom
of the crankcase. Reinstall the cam gear cover and tighten the screws.