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    1973 Merc 650 Belt Timing

    I am attempting to do a complete tuneup on my 73 Merc 650 (ser #3664924 with thunderbolt ignition) and I am unclear on how to align the timing belt. I know that the flywheel needs to be at TDC and then I remove the timing belt pulley and belt and then align the cast tab on the pulley with a...
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    Timing Tab on 1973 Merc 650

    I'm trying to set the timing on my 1973 Merc 650 and there is supposed to be a plastic tab that comes up from the top of the cylinder head that provides a reference so that I can do the timing. I don't have one and I can't find it in the parts list that I have. Does anyone know what this part...
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