The following steps are critical for proper timing of APU. Repeat steps as required
until proper timing is achieved or damage to equipment may result.
With decompression valve (15) held open, turn manual handcrank (16) so that F1 mark is just below timing mark
on flywheel housing (19).
With decompression valve (15) held open, slowly turn manual handcrank (16) and stop when fuel level rises at tip
of tube. Timing mark and F1 mark should now be in alinement.
If timing is incorrect, adjust with shims (12). (Refer to installation procedure above.)
Shims are available in 0.1 mm, 0.15 mm, and 0.5 mm thickness. Adding or
removing one 0.15 mm shim varies the crank angle by approximately 1 degree. To
advance timing, add shim(s). To retard timing, remove shim(s).
Install and reconnect all parts removed during adjustment procedure. (Refer to installation procedure in this
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