Those Field Marshalls are brutes to start with a handle! They are 25hp, single-cylinder and take a lot of strength to turn over. You have to get the piston into a specific position, then engage a decompressor mechanism onto a scroll cut into the edge of the flywheel and WIND! As the flywheel turns, and the driver runs out of steam, the decompressor runs off the edge of the flywheel, and gives full compression. With an almighty last effort, you get the engine over top dead centre and it fires. You drink a cup of tea to get your strength back, then go to work.The exhaust note is amazing, with a fairly low number of revolutions and no silencer, but an expansion chamber instead.At the end of the day, your head is echoing to the noise! Wonderful! Phil
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Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
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