2B7410 is a pipe plug in the pony top manifold used for checking the timing mark on the mag drive gear. No maintenance required.
Thanks OM-that's a handy thing to know. I did not use it when I timed the replacement MAG I installed a few months ago. Just the mark on the MAG itslef and also flywheel. I must have gotten lucky.
Do any of the manuals or books describe that view port? I have gone through all of them pretty thouroughly and do not recall seening it.
Thanks again-you are a big help.
bernie
Check the Service Manual for the 4-1/4 x 4 cylinder engine.
Instructions on alignment of timing marks for the starting engine.
On my repro copy it is page 101.
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