Re: Pony motor

Posted by Bob on September 20, 2006 at 21:10:18 from (69.178.229.154):

In Reply to: Pony motor posted by LCinIN on September 20, 2006 at 21:01:55:

The "pony motor" is a 2 or 4 cylinder (depending upon tractor model) little gasoline engine mounted in place of an electric starter on the big diesel engine.

You first started the little gas engine with an electric starter (a recoil starter was also available on the "R"'s), then pulled a lever to engage the starter drive on the "pony" engine with the diesel's flywheel ring gear, and the little gas engine cranked the big diesel like an electric starter cranks your car.

For extreme cold weather, you could release the diesel's compression (and leave it's throttle in the "shutdown" position), and allow the "pony" to crank the big diesel for a while to limber it up a bit, for better starting, while the pony's coolant circulated through the big engine, warming it up, and the big diesel's intake was heated by the pony's exhaust by means of a heat exchanger.

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