Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 09-08-2019, 02:32 PM   #1
ETAModel
Member
 
Join Date: May 2013
Location: Wichita Falls, Texas
Posts: 35
Default Timing/Spark control arm

The timing/spark control arm on my friend's 30 Model Fordor is different than what I've seen on other A's. There are no "notches" to adjust the spark, and it doesn't seem to stay at full advance. It will drift up to about half way up while driving. I push it back down and a few minutes later it is back up from where i put it.

Someone said it maybe a replacement...thoughts??
ETAModel is offline   Reply With Quote
Old 09-08-2019, 03:41 PM   #2
1931 flamingo
Senior Member
 
1931 flamingo's Avatar
 
Join Date: May 2010
Location: new britain,ct 06052
Posts: 8,172
Default Re: Timing/Spark control arm

The notches have most likely worn off...................
Paul in CT
1931 flamingo is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 09-08-2019, 04:22 PM   #3
barkleydave
Senior Member
 
barkleydave's Avatar
 
Join Date: Oct 2014
Location: Kentucky
Posts: 468
Default Re: Timing/Spark control arm

If notches have worn off a temp fix is to glue a piece of emery paper to provide resistance on the level.
barkleydave is offline   Reply With Quote
Old 09-08-2019, 04:30 PM   #4
Fred K-OR
Senior Member
 
Fred K-OR's Avatar
 
Join Date: May 2010
Location: Stayton, Oregon
Posts: 3,793
Default Re: Timing/Spark control arm

On my two "29" A's, the spark lever notch arms seem to be different. One is much longer than the other. Is this the difference between a 28/29 and a 30/31? I think maybe my 29 std coupe may have a 30/31 steering column in it. It also has a two tooth gear column. It was rebuilt from parts so the column could by a later one than a 29. Anyone have any ideas on this?
__________________
Fred Kroon
1929 Std Coupe
1929 Huckster
Fred K-OR is offline   Reply With Quote
Old 09-08-2019, 10:13 PM   #5
Mike V. Florida
Senior Member
 
Mike V. Florida's Avatar
 
Join Date: May 2010
Location: South Florida
Posts: 13,994
Send a message via AIM to Mike V. Florida
Default Re: Timing/Spark control arm

Yup worn off. You can file in the notches and file the lever to get it to work again.
__________________
What's right about America is that although we have a mess of problems, we have great capacity - intellect and resources - to do some thing about them. - Henry Ford II
Mike V. Florida is offline   Reply With Quote
Old 09-09-2019, 08:36 AM   #6
Jacksonlll
Senior Member
 
Jacksonlll's Avatar
 
Join Date: Jul 2012
Location: Michigan-- Member of Oakleaf of MARC
Posts: 1,258
Send a message via ICQ to Jacksonlll
Default Re: Timing/Spark control arm

Keep in mind that you can pull that rod up toward you to make room for whatever you do. It’s spring loaded at the bottom and will come up a bit.
Jacksonlll is offline   Reply With Quote
Old 09-09-2019, 02:11 PM   #7
duke36
Senior Member
 
Join Date: Jun 2015
Posts: 1,061
Default Re: Timing/Spark control arm

Timely question, ETA. I've contacted numerous vendors (some of the A ones) including metal stamping companies, etc. The A vendors indicated not enough demand to warrant the tooling costs for an add-on quadrant serrated plate, etc. and others' prices can be prohibitive for small runs. There are some repro's for Model T's which don't fit the A.
A metal finger nail emory board can be modified and glued to the worn area but isn't as effective as the cut grooves. Also, hope your friend drives the car with the advance set for driving conditions. Many threads about the lever set at approx. 9:00 or so down for higher speeds and also depending on the type of head.

Last edited by duke36; 09-09-2019 at 02:17 PM.
duke36 is offline   Reply With Quote
Old 09-09-2019, 03:59 PM   #8
SAJ
Senior Member
 
SAJ's Avatar
 
Join Date: Jul 2010
Location: Auckland, New Zealand
Posts: 348
Default Re: Timing/Spark control arm

Using the extra gap that JacksonIII mentions, I screwed in grooved bronze quadrants hand filed from scrap. The screws would be better if brass but stainless was all I could find on the day. It clicks nicely but more, finer grooves would look better.
SAJ in NZ
Attached Images
File Type: jpg 2016-02-27 18.35.32-2124x1195.jpg (42.1 KB, 29 views)
SAJ is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 07:21 PM.