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Hi, all. I have a 1947 Ford Marmon Herrington that I've had for a bit and am starting to restore. Not sure which way to go with it. It has a flathead that's froze so I'll have to get a new motor anyway. Could go with a new rebuilt flathead or get a diesel, not sure. Probably put a deck on it, but other than that keep it pretty stock. The metal is absolutely rust free, floors, cab corners, fenders, everything. The colours are pretty crap but I'm not doing anything with the body, worst case I'll take it to almost bare metal and clear coat. I could use any help or advice anyone out there has to give.
Welcome, fine looking M-H. Choice of engine is a personal matter, but a rebuilt flat motor would get it back into service without having to create mounts and other drivetrain mods.
Do you know the truck's history? Reason I ask, drive trains for the Snogo blower equipped trucks were different than traditional trucks due to the under drive gearing needed for their specific duties. The guy to get in contact with is Chuck Mantiglia of Chuck's Trucks. He's the M-H expert. Stu
I recommend keeping a flathead in it. If you ever need to sell the truck the value will be hurt by an odd motor. Big trucks don't bring a lot of money, modifications typically only lower the value.
Hi all. Could use a tip here. I picked up a running 8ba for my Marmon but its missing a few doodads. Like generator, coil, carb. The chap I bought it from said it ran fine except it had low oil pressure. Any tips? It's a Canadian motor which means Merc. Does that suggest 255? Any help here would be appreciated.
Hi all. Could use a tip here. I picked up a running 8ba for my Marmon but its missing a few doodads. Like generator, coil, carb. The chap I bought it from said it ran fine except it had low oil pressure. Any tips? It's a Canadian motor which means Merc. Does that suggest 255? Any help here would be appreciated.
Rick
I'm no expert but I know I bought a Canadian block with Canadian EAB heads engine that didn't have the 4" crank and I don't know if it ever had one. It had been apart since it was .040 over so you never know if an engine has a 4" crank until you pull a head. As far as low oil pressure goes my '39 p/u with an 8ba had only about 30 lbs of pressure at best and only 7lbs at hot idle and I drove it for months until I replaced it with a completely rebuilt one. So you may be able to run the engine as is depending on what the PO meant by low oil pressure. JMO
In the USA the only Mercurys were passenger cars. Technically those never came with an 8BA, they were 8CM, 1CM, or EAM. However, Canada did their own thing. In order to have a full line of cars and trucks to sell, a Mercury in Canada could be a re-badged Ford, or it could be a Mercury as USA knew it. Therefore the engines from a Mercury in Canada can be either the Ford 239 or the Mercury 255 motor. As mentioned above, measuring is the only way to be sure.
Low oil pressure is meaningless without actually knowing what the psi is at idle. Flatheads are notorious for having low oil pressure to begin with. Add wear to the cam bearings and they just get lower. It typically doesn't kill the engine, just a sign of a worn motor.
Post pictures of the engine and we can tell you if it is from a truck or not. Depending on what oil pan, intake, and water pumps it has you may need to swap those items or look for specific carburetor options.
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