To reemphasize you must go past TDC to release the impulse coupler, this should happen at TDC, where you will see the TDC mark on the back side of the gear support line up with the case parting line. You will also note the crankshaft turns very easy back and forth 2~3 degrees at this position. Thats close enough for our purpose. Then rotate the prop BACKWARDS to about 40~50 degrees BTDC, then rotate in normal direction of rotation and come up slowly on your timing marks, 20 or 25 as required, indexed at the small hole in the starter as you monitor your buzz box. If you need to adjust, repeat the procedure before checking it again.
You don't need any wooden sticks, piston stops or index wheels to do this unless you feel the need to verify the factory timing marks.
Tim Andres
|