As long as the rotor is tight enough to be generally pointed towards the electrode for the proper cylinder, looseness will have absolutely no effect on timing. The timing is determined by rotation of the cam, which is not driven by the rotor. The absolute rotation position of the cam will be affected slightly by wear in the valve train and gear reduction of the battery ignition unit. However, any change due to wear of those parts is compensated for each time the timing is set.
By the way, the spring built into the center contact of the rotor keeps it in place as long as the cap is on. The only time a loose rotor can hop off is when the cap is removed.
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Today's Featured Article - Women and Tractors - Tractor Engine Repair - by Teri Burkholder. One of the great things about working on a tractor engine with your other half is that you know what he is thinking of at all times and can anticipate his every move and his next thought of what he will do. With Ben, anyway, I can tell! He'll be busy working and I’m handing him tools and he says, "give me that..." and I’ve already got it in his hand or "hand me that....."and I’ve got the portable light right where he needed it placed to see. "Run in the house and get me a...."as I open th
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