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Lister D top dead centre marks

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Lister D top dead centre marks

Post by The Newby on Tue Jan 26 2016, 15:02

Hi all, its me again. I have had the magneto on my engine checked by an engineer and its giving a good spark. My problem now is that I need to find out exactly where top dead centre is, and where the firing point is, as these have been obliterated due to it having stood out in the weather for some time before I got it.
Give me a clue please.

The Newby
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Re: Lister D top dead centre marks

Post by ray fisher on Tue Jan 26 2016, 16:50

When the piston is at the top of its stroke Very Happy
The easy way to tell is when the flywheel keyway is at the bottom
The firing position is best at about 12degree before this position so if you set your crankshaft with the keyway at the bottom and then mark the top of the flywheel you will have a TDC mark.
Now rotate the flywheel ( in the direction its meant to go until the TDC mark is ABOUT 12deg before the top position. Now you set the mag so the points are just opening and lock up the bottom sprocket on its shaft.
Hope this helps.

ray fisher
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