F-12

S.Gross(in pa) · Dec 4, 2008

is there any way of telling if the engine was gas or dual fuel by looking at the serial number

Athol Carr · Dec 4, 2008

No. The only way is to look at the manifold, dual fuel or gasoline (most were probably dual fuel), or the fuel lines.
The dual fuel manifold had the exhaust pipe going up from the centre of the manifold top and there was a driver controlled valve to adjust temperature, the lever being on the outside of the manifold. On the gasoline tractors the exhaust went up from ahead of the centre of the manifold and there was a small temperture adjusting lever at the rear face of the centre of the manifold, similar to the manifolds for the letter series tractors with dual fule manifolds.
The dual fuel angines had a gasoline tank in the rear of the main fuel tank and a small header unit set in the hood just ahead of the tank. The fuel from the pump went to this small header chamber, some to the carburettor and the rest back to the fuel line to the pump. The gasoline engines just had the single tank, the fuel from the pump went to a T junction at the front of the tank just below the hood, some to the carburettor and the rest back to the tank.

Andy Motteberg · Dec 4, 2008

Most likely dual fuel since so many of them were. All fuel models had a small starting tank inside the large fuel tank with another filler neck on the tank. They also had a fuel line vent mounted in the hood. Kerosene tractors also have a different manifold with a heat control rod going up to the dash.

J.O. · Dec 5, 2008

I've been doing alot of research on the F-12 recently, as I just purchased a 1936 model. According to my research they were produced as gas tractors, with kerosene (distallate) being an "add-on kit">

F-12

S.Gross(in pa)

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Athol Carr

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Andy Motteberg

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J.O.

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