Specifications for a Mac 130 can be found here:
Chain Saw Collectors Corner
http://www.acresinternet.com/cscc.nsf/ed1d619968136da688256af40002b8f7/c1f32b7598cccadd88256c2f0019c792?OpenDocument
Ignition coil gap:
An index or business card is a good gap tool. Remove the plug, rotate until magnetic attraction pulls coil and card tight to flywheel, tighten the coil screws. Rotate flywheel until magnetic attraction eases, remove card, rotate a couple of revolutions and ensure nothing drags or contacts flywheel. HTH
Lou
The above info is totally wrong as I have found out to my cost, will have to strip my chainsaw down again. The lamination gap should be .008 to .012" or .203 to .304 mm.
Warren
The basic weight of 25.5 x 30.5" index paper ranges from 90 to 140 pounds.
The average reported thickness in inches http://www.casepaper.com/calc_chart_cali... ranges from 0.007" through 0.011". All of these are within or very close to your own reported tolerance in inches.
It is non-magnetic which in this case is very important, almost everyone has a piece at their finger tips, and the gap is not critical provided it does not contact the fly wheel.
Sorry if I cause you any angst.
Lou
I agree that the actual gap isn't critical and .011" paper is fine. However every Mac saw I've worked on has several thousandths play in the main bearings and if you set the gap too tight the magnets could actually cause the flywheel to make contact with the ignition. I set the gap to the non magnetic area of the flywheel and then check it at the magnets. It usually ends up a few thousandths tighter at the magnets.
Anybody else have this issue with the crankshaft/flywheel play?
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