41 mercury engine question
- Thread starter fortyfords
- Start date
petehoovie
Well-known member
Kube
Super Moderator
Still eagerly waiting to see the documentation from your fifty plus years of research.
Kube
Super Moderator
You are correct in that green was used through 1942. Not the green on the repainted engine your photo depicts but green nonetheless
The blocks with the flat milled intake manifold surface add 99 stamped on top is a 39/40 Mercury engine. The 41 Merc engine had the pencil shelve above the timing cover and raised deck intake manifold surface. 41 Merc engines were still painted green not blue until 42. This has been verified by checking out several 41 Merc with 30k miles or less untouched cars. 41 Merc left hand exhaust manifold is 1941 Mercury only. 3 3/16" bore with round center water port.
The blocks with the flat milled intake manifold surface add 99 stamped on top is a 39/40 Mercury engine. The 41 Merc engine had the pencil shelve above the timing cover and raised deck intake manifold surface. 41 Merc engines were still painted green not blue until 42. This has been verified by checking out several 41 Merc with 30k miles or less untouched cars. 41 Merc left hand exhaust manifold is 1941 Mercury only. 3 3/16" bore with round center water port.
rotorwrench
Well-known member
Ford Motor Co was changing things in 1941 to conserve materials for the Lend Lease war effort. The powers that be could see the writing on the wall so that was why the 1941 engine had changes like the loss of the bulges on the pan rails for the sand clean out ports and the reduced casting material on the intake deck. The thickness of the cylinder walls for the 95 HP engines was also reduced. These changes affected parts of the 221 engines as well. The 60-HP was on the way out of production. Ford tried the little 9N 4-cylinder tractor engine in the commercial pickups but it didn't go over well. The G series 6-cylinder came on line in 41 and was used extensively during the war for the 1 1/2-ton trucks. V8 production was limited to the different Universal Carrier subtypes. They used both the 221 and the 239 engines. The 239 was used in quite a few trucks from it's inception and some through the war years.
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The V8 Times is not correct. 81T heads were used on 39 and early 40 Mercurys them they whiched to 81A heads through 41 Mercurys. I verified that by original notice letters from Ford and by checking several all original 41 Mercurys (early and late) with less than 30K miles on them. They are also painted green.
If you give me you email I will email some of what I have. Feb-26-41 High compression cylinder heads installed. Service Letter 148 "On future 95 H.P. engines through production, passenger car motors, as well as commercial, 3/4 and one-ton engines, will have 81A-6049-A and 81A-6050-A cylinder heads, while 95 H.P. truck will use 81T-6049 and 81T-6050 cylinder heads."