Quote:
Originally Posted by Y-Blockhead
There are two different "sets" of timing marks used on Y-Blocks.
One has the pointer with the scale on it like yours with only one mark on the damper. This is the early style.
The other has a single pointer and graduated marks on the damper like yours. This is the later style.
Appears to me you have a combo of each "set".
I would use the "0" on the damper as your TDC and time to 10° BTDC on the tab. Make sure that the "0" is a true TDC. Sometimes the damper spins in the pulley, throwing off the mark.
Hope that helps...  |
I recently worked on a '54 Mercury 256 Y Block, and it had a pointer mounted to the engine, and the TDC with notches up to 10 degrees was on the damper ring. Maybe they were all over the place.