Topic: 1941 Mercury KB-1A carb choke? – Page 2 – Antique Outboard Motor Club,Inc

This topic has 28 replies, 6 voices, and was last updated 2 years, 11 months ago by fifty20ne.

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February 4, 2023 at 9:50 pm #272352
Buccaneer
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Louis, what did the choke assembly 23224A2 look like?

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February 4, 2023 at 11:28 pm #272355
dave-bernard
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if I rember it was a spring-loaded disc that you pushed with the choke button.
February 5, 2023 at 3:24 am #272356
fifty20ne
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Imho the power head

is not from a 1941

Mercury KB-3

it May have been

Replaced with a

1940 Sea King or 1941

Sea King power head

and popet valve

style carb! The 1941

Mercury was a deluxe

model that did not use

a popet valve style

carb. The popet style

carb would not work

or fit under the lower

carb cover.
- This reply was modified 2 years, 11 months ago by fifty20ne.
February 5, 2023 at 10:01 am #272366
Buccaneer
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fifty20ne wrote:

Imho the power head

is not from a 1941

Mercury KB-3

it May have been

Replaced with a

1940 Sea King or 1941

Sea King power head

and popet valve

style carb! The 1941

Mercury was a deluxe

model that did not use

a popet valve style

carb. The popet style

carb would not work

or fit under the lower

carb cover.
- This reply was modified 2 years, 11 months ago by fifty20ne.
You could very well be correct about my poppet valve carbed powerhead
being a cousin to a Mercury, but the only reason I question this,
is the Tillotson Carb data, showing the KB3 had the AJ carbs,
but not until 1946.

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February 5, 2023 at 11:08 pm #272399
green-thumbs
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The basic powerhead for 1941 Kiekhaefer singles was the same whichever brand or mode it was incorporated. The difference is in the decals, cowl, carburetor or poppet valve , spark plug cover, rope plate or rewind starter.

How you choose to complete your KB-3 is your choice, If it please s you as is, so be it. KB-3 should be part of every PreWar Mercury collection as it is a Top of the Line Mercury.with all of the trimmings.

Louis
February 6, 2023 at 5:18 am #272402
billw
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Regarding the method of fastening the flywheel and rope plate, I was doing something totally unrelated yesterday and happened to notice the parted-out carcass of a KB1A, with the flywheel and rope plate still there. The acorn nut was loose, so I took off the rope plate and found that the flywheel was attached securely with a thin nut. My guess is that this was probably the correct way to do it.

Long live American manufacturing!
February 6, 2023 at 11:26 am #272408
green-thumbs
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My reprint of owner’s manual for 1941 Merdury KB-1A shows only ACON nut, The jam nut is NOT shown or listed, Probably a later field fix by clever native craftsmen, One caution, the manual had to be prepared before production began. It is possible that jam nut is as it left factory. A survey of known original motors might or might not resolve issue as production and field fixes might not apply to all motors.

For lack of data on observed original examples, I would go with the manual and say NOPE

Louis
February 6, 2023 at 1:41 pm #272410
fifty20ne
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Bills picture for a post war single I believe to be correct. Remember parts get swapped around on 80 year old motors.

Im going to post Mercury manual for Mercury KB1-A Comet and some pictures from my 1941 KB1-A with steel tank.
February 6, 2023 at 1:45 pm #272415
fifty20ne
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February 6, 2023 at 1:48 pm #272420
fifty20ne
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