Topic: 1959 Elgin 12 hp (West Bend) carb issue – Page 2

This topic has 23 replies, 6 voices, and was last updated 2 years, 2 months ago by Buccaneer.

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September 9, 2023 at 9:26 am #280372
Buccaneer
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Tubs wrote:

Heavy float maybe?
Tubs.

Lightweight brass float, with no gas inside.
I need another cup of coffee to face the day,
then I’m going to fire up the Elgin and see
what happens after the lap job on the needle
and seat.

Prepare to be boarded!
September 9, 2023 at 11:17 am #280373
Buccaneer
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Well, my valve and seat lapping was a dismal failure,
if that’s even the problem, but if not, I lack understanding
how gas comes out the carb vent when the needle and seat
always pass the “invert and blow” test when I have the
carb apart.

When I started it up today, gas was immediately streaming
out the vent atop the carb, peeing about six inches.
When I unplugged the tank hose to run it out of gas,
and when on it’s final “cough” before stopping, the
carb shot gas out the vent three feet.
Something is “Abby Normal” for sure.
I’m not messing around with it anymore until my carb kit
comes with the new needle and seat.
I may take the fuel pump apart to inspect, but it seems to
be working okay. Not sure if there’s parts available, but
I guess it’s time to start looking.
Signed, “Baffled”.

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September 9, 2023 at 12:10 pm #280374
Tom
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I think the fuel pump is OK. When you pull the fuel supply, it keeps pumping air. That last spurt out the carb is a blast of air blowing out the last of the fuel in the carb bowl.

Perhaps look for interference between the float and gasket. Also, be sure the float pin is NOT nylon.

Good luck, those motors are usually pretty nice to run.

Tom
September 9, 2023 at 12:41 pm #280377
John Gragg
Participant
US Member
Are you using the same gas tank for both the barrel test and the lake test?

Been 50 years since I’ve seen a quick connect for outboards so remind me please? A pipe for fuel and a pipe for vent, correct? I will look it up also.

How about a tiny hole in the fuel pump diaphragm? Just enough to pass air bubbles into the bowl with the fuel delivery? That would account for running good, needle and seat okay, fuel oozing and streaming out the vent after shut off, right? No?

Can’t wait to see the cure…

John Gragg
RIverside, CA

Just starting in the hobby, please be patient.

48 Sea King 5hp GG9014A. Sold
49 Sea King 5hp GG9014A
48 Johnson TD20. Sold
49 Johnson TD20. Sold
54 Johnson QD15. Sold
55 Johnson CD12. Sold
57 Johnson RJE-19M
57 Johnson RDE-19
September 9, 2023 at 3:03 pm #280381
Buccaneer
Participant
US Member
Tom wrote:

I think the fuel pump is OK. When you pull the fuel supply, it keeps pumping air. That last spurt out the carb is a blast of air blowing out the last of the fuel in the carb bowl.

Perhaps look for interference between the float and gasket. Also, be sure the float pin is NOT nylon.

Good luck, those motors are usually pretty nice to run.

Tom

Tom, Unless the manufacture doesn’t recommend removed the tank
hose while the motor is running, I’m thinking gas blowing out of the
carb vent three feet would be a bad thing, especially when the hood
is on.
The carb body gasket interference is a good idea to check out,
but I did do the “invert and blow” test when the carb was all together,
and it seemed okay. New gasket coming with the kit.
Thanks for the suggestion.

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September 9, 2023 at 3:06 pm #280382
Buccaneer
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John, yes, I’m using just one gas tank, and it’s a single line
tank that has a vented cap.
Double line, pressurized thanks fell out of favor by 1960 ish.

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September 9, 2023 at 3:30 pm #280387
John Gragg
Participant
US Member
Yep, just looked it up to figure out what I was remembering.

Ok, back to the sidelines to watch the show. Good luck.

John Gragg
RIverside, CA

Just starting in the hobby, please be patient.

48 Sea King 5hp GG9014A. Sold
49 Sea King 5hp GG9014A
48 Johnson TD20. Sold
49 Johnson TD20. Sold
54 Johnson QD15. Sold
55 Johnson CD12. Sold
57 Johnson RJE-19M
57 Johnson RDE-19
September 9, 2023 at 3:38 pm #280392
jeff-register
Participant
US Member
I have heard of using not valve grinding compound but valve finishing compound. It is a finer grit is all. I agree with Tubs the last valve ( needle & seat) is faulty. or a sinkiing float. Is the float cork or copper? Try letting it sit with a counter weight to hold it submerged over night & see if it takes on gas. I had a carb problem with my 350 V-8 4 bbl carb with spewing from the vent with a brand new Holley made for a small block. My electric fuel pump had too much pressure & blew the needle out of the seat cock-eyed & poured gas out of the vent too. installed a pressure regulator with a return liine to solve. I think the guys have it right!!
September 9, 2023 at 4:06 pm #280397
Tubs
Participant
This is – “The stuff that drives you crazy”.
Anxiously waiting to learn the cause.
Quite the mystery.
Tubs

A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.
September 9, 2023 at 5:50 pm #280398
Buccaneer
Participant
US Member
Carb kit should be here in two to four days. If they don’t fix
it, I’m going to have to take some “smart pills”.

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