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St lawrance carburator

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kmino
New member
Username: kmino

Post Number: 1
Registered: 07-2023
Posted on Monday, July 31, 2023 - 06:23 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hello everyone. I just picked up my first St Lawrance 3-4 hp single cylinder marine motor. It�s missing the carb. From what I have read there are different NPT thread size for carb to manifold. Did they all use the same schebler D carb? Picture
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chris_spring
Senior Member
Username: chris_spring

Post Number: 268
Registered: 02-2019
Posted on Monday, July 31, 2023 - 07:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

My 3 hp circa 1925 has a Schebler Model D. Standard pipe thread between the carb and the crankcase.

Cheers!
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miro
Senior Member
Username: miro

Post Number: 1238
Registered: 11-2001


Posted on Friday, August 04, 2023 - 08:56 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I think the head on your engine is on backwards.
The priming cup should be at the front, 180 degrees from where it is now.

It matters how the head is put on - there are water passages that make the difference
miro
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chris_spring
Senior Member
Username: chris_spring

Post Number: 269
Registered: 02-2019
Posted on Saturday, August 05, 2023 - 09:15 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Good catch Miro.

Cheers!
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bruce_g
Advanced Member
Username: bruce_g

Post Number: 38
Registered: 12-2009
Posted on Monday, September 18, 2023 - 12:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Most St. L engines have a 1 inch intake thread.
Does your Atlantic engine have igniter or spark plug. Bruce

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