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If you ever decide to do a half-scale of the long neck 2 horsepower, you'd have a 2 x 3 bore and stroke and 12" flywheels. That would make a very nice running engine. I thought that I mentioned earlier that I have some blueprints. About 20 years ago I had the opportunity to photograph many of...

The Monitor used a buzz coil and a 1/2npt spark plug. Some of the later pump jack engines and the HJ horizontals could be ordered with a magneto. As far as compression ratio goes 3.5 or 4 to 1 is good, anything higher and they hit too hard. You don’t want the engine to jump every time it fires...

I’ve collected Monitor engines for 35 years or so. I have some info in pdf form that I can email you if you like. Contact me via pm or find the Monitor engines group on Facebook. I’ve uploaded a few things there. First off, all vertical engines, 1-1/4 to 7 horsepower, are model VJ. That stands...