Topic: 1941 Mercury KB-1A carb choke? – 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 2, 2023 at 1:11 pm #272229
Buccaneer
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This AJ Tillotson carb on this subject motor
had no “choke” plate.
Is it suppose to have a plate with the strange spring
(that takes me a few tries to get it in stalled correct)
like the some Mercurys?

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February 3, 2023 at 10:12 pm #272286
green-thumbs
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KB=1A Owners Manual shows carburetor and cam. No break down of parts. New Parts List has all parts named and numbered, but would take some time and patience to sort out. There is no indication of any movable choke device on the AJ 3A out.
- This reply was modified 2 years, 11 months ago by green-thumbs.
February 3, 2023 at 11:08 pm #272293
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Strange, if there’s no provision for choking it, but I suppose if necessary
one can come up with some way! Thanks.

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February 4, 2023 at 5:43 am #272297
dave-bernard
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just tap on the float rod o choke. dumps fuel in the throat.
February 4, 2023 at 9:11 am #272304
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dave-bernard wrote:

just tap on the float rod o choke. dumps fuel in the throat.

That usually works, unless the motor has a cowl on the front.
Not sure this little “Plain Jane” Merc ever did though.

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February 4, 2023 at 12:51 pm #272318
green-thumbs
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No rewind Now Cowl. KB-1 and KB-1A.

I would appreciate a photo of KB-3 set up.

Louis
February 4, 2023 at 3:02 pm #272329
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Louis, the KB-3 has the poppet valve carb with a “tickler” to lift the
poppet off the seat to prime.

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February 4, 2023 at 4:04 pm #272338
fifty20ne
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Per Spec Sheet KB-3 has Tillotson Auto style carb.
- This reply was modified 2 years, 11 months ago by fifty20ne.
- This reply was modified 2 years, 11 months ago by fifty20ne.
- This reply was modified 2 years, 11 months ago by fifty20ne.
February 4, 2023 at 4:59 pm #272343
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Interesting that my KB-3 was built after Thuerwatcher’s, and I have
a poppet valve carb. Things that make you go “hmmmmmmm”?

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February 4, 2023 at 5:36 pm #272345
green-thumbs
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New Parts List reveals a few items of interest Tillotson AJ 10A is used on KB-3, KD-3 -1 and KD-3-2 each of which have Cowl, Carburetor 1399-538 SO same carb, same cowl AND same choke assembly 23224A2 This means the relatively uncommon KB-3 shares cowl, carb and choke with more common KD-3 singles. Missing choke assembly solved.

Louis

If the New Parts List is to be believed (sometimes The List need a little cross checking) KD-3 carburetor and choke assembly are the same. A side by side comparison with one or more known original KB-3 would move me from 99% to 99,00% sure. Best proof is always several known originals and sometimes even they will vary because Kiekhaefer was not always able to build as they intended.
- This reply was modified 2 years, 11 months ago by green-thumbs.
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