There is some fog around this model. Some sources say it was introduced to the military in approximately June of 1943. Carter service Bulletins don't show it until August of 1948. This could indicate it was a transition carburetor from the MB/GPW to the M38, as the M38 appeared in 1949. But, it could have been available to military motor pools in limited areas of operation as early as 1943. The last patent number of 12, all boxed in, is 2252958. It has the yellow/gold phosphate finish most commonly seen nowadays and sometimes poorly rendered. Like the 539S, it has no "Circled-C" logo on the air horn. But the Choke bracket assembly has a "Circled-C R" stamped on it. There is a marking under the bump on the bowl side of "O-614". The Bowl Cover has a marking of "146-94". The flange marking is one letter and one figure, e.g. L 8, while the flange stamp is "407". The marking on the lever assembly is a "Circled-C", a "Circled-R" and "Patent 2179380". The lever has three arms.
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Last Edit: May 12, 2016 14:52:20 GMT -5 by Scoutpilot
Old fashioned service never goes out of style.
oilleaker1: 7, yep 07* debating even doing anything today. Coffee and heaters are on.
Dec 6, 2021 5:43:18 GMT -5
Lee: 23* and a hurricane wind 🥶 the Monday blues
Dec 6, 2021 6:23:00 GMT -5
grumpy: 10* and dark here. 🥶 Coffee sounds great 👍 thanks
Dec 6, 2021 7:26:28 GMT -5
muley: darker 'n 2 foot up a stovepipe. i'll have a cup.
Dec 6, 2021 7:37:31 GMT -5
64cj5: To Rapid to see the specialist today, a sign of the age.
Dec 6, 2021 9:02:18 GMT -5
m38mike: Started at 13* but almost up to 40*. Lite breezes make it chilly outside. Think I'll work in the shop. Need a cup to go with.........
Dec 6, 2021 14:06:14 GMT -5
Scoutpilot: Another day in the history book...
Dec 6, 2021 18:57:48 GMT -5