8717 was built in Jan. 1940. Probably the original low compression head with 3/8 threads in head for a manifold attachment. Good chance it was a non gas manifold originally. Head was cast close to tractor build time. If 4-15-O is the date code on block that makes it cast in 4-15-1945. Hard to tell a O from Q on them. If a Q 1947. If the engine came from another M it will have a serial number stamped in the block just above the right side cover on a raised flat area near front and in a area below the first spark plug. First three letters of a prefix before the number would be FBK. If the block was purchased as a replacement it may not have a serial number. Should have a 4 number block casting number on block above oil filter in raised numbers. Will have a two letter suffix. if no serial number the cast number and suffix letters may narrow the ID down.
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Today's Featured Article - Storing Your Tractor - by Staff. If your tractor is going to be stored for any length of time, a few precautionary measures are helpful in preserving various parts, also in avoiding future difficulty. Store tractor under cover. If impossible to place tractor under cover, be sure to cover air stack and exhaust pipe. Drain radiator and engine block. To avoid gum content collections, drain both fuel tanks and carburetor. Leave radiator and fuel caps slightly loose to protect gaskets. Block tractor up to remove weight from tires and to keep tires from contact with moist floor.
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