New wires don't cost much, replace them with new copper core wires just to be sure it's getting to the plugs with all the strength possible. Only the better parts stores will have the copper core spark plug wires in my experience. Bring your old wires so they can cut the new to the exact length needed. As stated earlier you may not have 'enough' spark getting to the plugs to do the job. Does the impulse sound nice and strong when it trips? What model of mag?
Pull starting wouldn't have effected the timing. It sure sounds like a lack of enough spark from a tired old mag to me so far. Old wires will steal the snap away even when the plug fires just laying on top of the block. No good/bad test for them either is worth doing or believing.
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Today's Featured Article - Restoration Story: 1964 JD 2010 Dsl - Part 2 - by Jim Nielsen. Despite having to disassemble the majority of my John Deere 2010's diesel engine, I was still hopeful I could leave the engine-complete with crankshaft and camshaft-in the tractor. This would make the whole engine rebuild job much easier-and much less expensive! I soon found however, that the #4 conrod bearing had disintegrated, taking with it chunks of the crankshaft journal. As a resul
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