The thing is that all the fire crater pistons were supposed to be timed to 22 degrees btdc but the magneto has a set 35 degree advance ( spark lag). There was a special impulse coupler made for magnetos when used with fire crater pistons on the M. If you are satisfied with the way it runs ok, but if you intend to pull it heavy I am sure you will have detonation with a std magneto. Not good. I am sure you would have a smoother better running M with a 22 degree, properly tuned, battery ignition distributor on it.
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Today's Featured Article - Tractor Traction - by Chris Pratt. Our first bout with traction problems came when cultivatin with our Massey-Harris Pony. Up till then, this tractor had been running a corn grinder and pulling a trailer. It had new unfilled rear tires and no wheel weights. The garden was already sprouting when we hooked up the mid-mount shovel cultivators to the Pony. The seed bed was soft enough that the rear end would spin and slowly work its way to the downhill side of the gardens slight incline. From this, we learned our lesson sinc
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