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Old 12-10-2020, 11:07 AM   #1
GPierce
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Default Spark control lever detents worn

Is there a fix for worn spark and throttle control lever detents short of replacing the steering column?
Mine are worn almost smooth.
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Old 12-10-2020, 11:23 AM   #2
nkaminar
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Default Re: Spark control lever detents worn

What I have done is put a small length of plastic or rubber tubing over the control lever. It keeps the lever from wandering and keeps the detents from wearing further.
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Old 12-10-2020, 11:44 AM   #3
alexiskai
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Default Re: Spark control lever detents worn

In previous threads, various fixes have been proposed. I recall someone suggested chiseling new detents in. Someone else suggested increasing the spring pressure on the levers so the worn detents would hold better. I like the non-destructive approach of the flexible tubing idea, but you wouldn't regain the click-click-click nature of the original detents.
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Old 12-10-2020, 12:04 PM   #4
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Default Re: Spark control lever detents worn

With a hacksaw, just follow the grooves and cut new ones . Works great
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Old 12-10-2020, 12:27 PM   #5
Bob from Northport
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Default Re: Spark control lever detents worn

Use a small thin three sided file and carefully file each groove on each side. Works fine
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Old 12-10-2020, 12:36 PM   #6
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Default Re: Spark control lever detents worn

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Quote:
Originally Posted by Bob from Northport View Post
Use a small thin three sided file and carefully file each groove on each side. Works fine
This is what my mechanic did and it worked very well. Just like new.
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Old 12-10-2020, 05:05 PM   #7
Patrick L.
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Default Re: Spark control lever detents worn

I've filed them and it works, but, Tom W came up with the idea of using a chisel so no material is removed. I like that idea.
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Old 12-10-2020, 06:02 PM   #8
Ernie Vitucci
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Default Re: Spark control lever detents worn

Good afternoon...on a few Model 'A's...where the spark lever plate has been worn smooth, we have just used a medium hammer and bent the plate up just a little bit until there is friction between the plate and the lever...maybe not good for show...but does work for go! Ernie in Arizona
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Old 12-10-2020, 07:16 PM   #9
d.
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Default Re: Spark control lever detents worn

I remember a post from the 80's where the owner soldered a BB to the bottom of the control lever...said it worked great, including the "click".
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Old 12-10-2020, 09:40 PM   #10
abachman3
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Default Re: Spark control lever detents worn

I have welded up the rods and filed them back to a slight point. Worked quite well... but yes, you need to remove the rods to do this fix.
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Old 12-10-2020, 09:53 PM   #11
David R.
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Default Re: Spark control lever detents worn

When I rebuilt my steering gear I re-cut all the detents with a three corner file and welded up the worn bottom of spark and throttle rods and filed them back to a slightly V shape so they click in the notches nicely now. I also replaced the tension springs and brazed up and re-shaped worn ball ends on the levers.
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Old 12-11-2020, 01:54 AM   #12
redmodelt
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Default Re: Spark control lever detents worn

Quote:
Originally Posted by Bob from Northport View Post
Use a small thin three sided file and carefully file each groove on each side. Works fine
T, A or other cars do the same thing.
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Old 12-11-2020, 09:15 AM   #13
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Default Re: Spark control lever detents worn

A dremel and cut off wheel and a steady hand nice and clean and fast . That was the
fix on Ford tractors....
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Old 12-11-2020, 06:56 PM   #14
GPierce
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Default Re: Spark control lever detents worn

Thanks to all of you responders. Now I have good idea how to proceed.
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