Is there any relationship between the engine in the 8N tractor and the engine in the Model A ford cars or trucks? I was just curious since they are all Fords.

Jeff

The 9N L-Head is probably a better engine and as Gaspump stated, not a lot of similarities. The early V8 came after the Model A and the 9N engine was based on the 85 hp Mercury V8 cut in half. If you are thinking of swapping out 9N parts with Model A parts, forget it, it ain't gonna work. Parts are unique to a vehicle based on the prefix code. "9N' signifies the 9N tractor or thereafter. Look through parts manuals and you will see a lot of parts with "01A" or "59C" or B-xxxx, or several other part markings. These mean they are used on other vehicles as well. 01A is a good example. the zero designates first year used, in this case 1940. You see a lot of fasteners and hardware common to all passenger cars, trucks, and tractors. Other than that, you won't get say a 9N10000-B generator to swap out with a Model A one.

Tim Daley(MI)

The Mercury V8 was 95 hp You have just posted BS.

That story about being 1/2 of a Mercury V8 is just that, a big story. It seems to have originated with the people that pump out those MBI books about Ford Tractors. There are very few items on a Ford Tractor N engine that interchange with the Merc V8 other than nuts, bolts and some common fasteners that were common to FMC inventory of the day. The design is of a similar overall concept but that is it.

They are both 4 cycle, 4 cylinder, water cooled and that is about where it ends.