>
Al
>
Let
me offer this idea. If you know where the tip seals are, then you
can
derive TDC. Level the base of the engine, and the tip seals should
line
up verically. Pull the trailing plug, rotate the shaft until the
tip
seal shows up in the first chamber, then make a mark on the starter
ring
gear. Rotate the engine until the next seal shows up, and make
another
mark. Count teeth to get the center one, or make the two marked
teeth
line up vertically. This would eliminate the importance of the
spark
plug hole location.
I'm not sure I
understand this; but it suggests the assumption that the
TDC position is at the
trailing plug hole. - which I don't think is correct.
Al