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Old 02-21-2020, 07:46 PM
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ndutton ndutton is offline
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Quote:
Originally Posted by Jazzydaze View Post
So the valve in #4 that's visible through the spark plug hole. Is it true that when it begins to lift #1 is tdc?
No.

No valves are open at TDC and no valves are open during the half turn of the crankshaft leading up to TDC. If you're watching valves through the spark plug hole as you turn the crankshaft (counter clockwise facing the flywheel) you must determine which valve you're watching, intake or exhaust. After the intake valve closes, the next time the piston reaches the top of the cylinder is TDC for that cylinder.

There's a much easier way though:
http://www.moyermarineforum.com/foru...06&postcount=1
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Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others

Last edited by ndutton; 02-21-2020 at 07:59 PM.
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