Topic: ’54 Fleetwin – wont run on low speed – Page 2

This topic has 44 replies, 15 voices, and was last updated 3 years, 10 months ago by labrador-guy.

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June 15, 2020 at 8:33 am #205768
fleetwin
Participant
US Member - 2 Years
I am asssssuming that you removed that aluminum welch plug to expose that low speed mixing cavity….Needless to say, the engine is never going to idle without that installed, you will need a new one…
You have the lead shot, but did not show us where the empty hole is. Please post a picture, some of these holes are “vents” and are should not be plugged….
And yes, just because the engine seems to run on both cylinders at higher speeds does not mean it can’t drop a cylinder at lower speeds….I am assuming you have had the mag plate apart and inspected/replaced the coils, points etc…
June 15, 2020 at 9:55 am #205777
burnt-clutch
Participant
I’m aware of the welch plug and I took it out for the sake of the picture. I’ll go ahead and order a replacement lead shot and install it since the diagram picture calls for it. I also remember sweeping up a odd looking B.B. a few weeks after I took the carb apart. Is the shot supposed to be tapped into the biggest hole in that cavity, or is it supposed to be free to roll around as motor moves?
-Karl
June 15, 2020 at 10:48 am #205782
Steve D
Participant
Karl, Nothing gets tapped into any of those holes in the cavity. You just clean that area up and cap it with the expansion plug/welch plug #72, whatever you want to call it. You say the diagram picture calls for it but you may be interpreting it wrong if you’re thinking that #73 goes in there. As others have said, show us a picture first of where you think the lead shot should be, because that cavity isn’t it.
June 15, 2020 at 10:53 am #205785
fleetwin
Participant
US Member - 2 Years
Steve is right, I fear there is some confusion here….
The lead shot does not go inside the mixing pocket. Post some more pictures of the top of the carb so we can show you were the lead shot belongs, and if in fact it is actually missing…
June 15, 2020 at 11:46 am #205793
burnt-clutch
Participant
Ok, I’ll look at the carb tonight and verify what you are asking. I’ll also check for spark after dark. Are there any good aftermarket plug testers out there to buy?
-Karl
June 15, 2020 at 12:30 pm #205797
wedgie
Participant
Something like this. Good idea to check for spark leakage in the dark. I’ve found if the plug boots are dry rotted they will leak the spark to ground .you can also just grab the boots while running to find leakage too LOL 🙂

https://www.amazon.ca/OEMTOOLS-25227-Inline-Ignition-Tester/dp/B004FEJFTO
June 15, 2020 at 4:03 pm #205805
burnt-clutch
Participant
I was going through my phone and found another picture that I took. So I take it the lead shot goes where the arrow is pointing?
-Karl
June 15, 2020 at 5:38 pm #205811
fleetwin
Participant
US Member - 2 Years
Yes, that is where the lead shot is found…But, there appears to be some sort of decent plug in there already….I would leave it alone…
June 15, 2020 at 5:49 pm #205813
wedgie
Participant
Can confirm what Fleetwin says. The carb on my 1954 has the identical brass plug.
June 15, 2020 at 6:16 pm #205818
Buccaneer
Participant
US Member
wedgie wrote:

Something like this. Good idea to check for spark leakage in the dark. I’ve found if the plug boots are dry rotted they will leak the spark to ground .you can also just grab the boots while running to find leakage too LOL 🙂

https://www.amazon.ca/OEMTOOLS-25227-Inline-Ignition-Tester/dp/B004FEJFTO

Or you can do as my brother did to me when I was little……..had me hold the spark plug
and wire then roped over the flywheel…….. must of had good spark…… I still haven’t
forgotten after 50 years!

Prepare to be boarded!
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’54 Fleetwin – wont run on low speed

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