Hopefully, you installed non-resistor spark plugs and copper core plug wires, but I really don't think that is the problem here. What I think might be happening is that since the engine has been setting for so long, there is now some rust in those cylinders, and of course there is always a carbon build-up. I think little specks of the rust and carbon are breaking loose and then lodging temporarily in the gap of your spark plugs. With the actual compression as high as it is, those specks are eventually blown out, and then all is well again for at least awhile. The solution might be to get the engine good and warm, and then make it work hard for 30 minutes or so.
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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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