Governor timing and magneto

Farmall Cub Forum -- Questions and answers to all of your Cub related issues.

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
28plymouthman
Posts: 6
Joined: Sun May 18, 2014 1:20 pm
Zip Code: 44666
Tractors Owned: Farmall Cub 1949

International 504
Location: North Lawrence, Ohio

Governor timing and magneto

Postby 28plymouthman » Sun May 18, 2014 1:44 pm

Hi , new to this site. I am trying to time the governor on this cub. It was running when I dimantled the tractor to replace the bolster which did not make it through the winter because of not enough anti freeze. Thought I would take every thing off the engine and repaint it while I was at it. Well now it pops and sounds like a rod is knocking very badly. I know it must be in the timing. I did not remove the crank pulley or the timing gear. I did remove the governor. I have found a single dot punched on a tooth on the governor and found a single dot punched on the back side of the cam gear that you can see through the magneto side. But there is also two punch marks on the front of the cam gear. I have been told that the single dot on the governor tooth should go in between the two on the cam gear. I painted the two teeth so I could see them from the back as I was installing the governor so everything would line up. But this puts the top dead center mark on crank two and a half inches past pointer when the governor slots are at 2.00 o clock ;and 8'00. It just doesn't make sense. What is the single dot on the back ;side of the cam gear that you can see in the mag hole but gets rotated out of site when you line up the two marks on the cam gear to put the one punch mark on the governor in place. It just doesnt run. Please help me out. Thanks

Posco
Cub Star!!
Cub Star!!
Posts: 309
Joined: Sun Jul 14, 2013 11:24 pm
Zip Code: 04730
Tractors Owned: 1950 Cub...so far
Location: Houlton, Maine

Re: Governor timing and magneto

Postby Posco » Sun May 18, 2014 7:55 pm

Newbie here but I just went through the same thing so until someone much more knowledgeable chimes in...

Did you have the #1 cylinder at TDC and with the pointer aimed at your pulley timing mark before you put the governor back in?
Did you yank the number one plug and feel for air being evacuated as you rotated the engine with the hand crank?

Eugene
Team Cub Mentor
Team Cub Mentor
Posts: 16191
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: Governor timing and magneto

Postby Eugene » Sun May 18, 2014 9:00 pm

Is the ignition system: battery powered, magneto, or magneto with external coil?
I have an excuse. CRS.

User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
Posts: 22183
Joined: Sun Feb 02, 2003 2:09 pm
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
Location: Mo, Potosi

Re: Governor timing and magneto

Postby John *.?-!.* cub owner » Sun May 18, 2014 11:00 pm

it is one mark to one mark. Here is the illustration from the IH service manual. As eugene pointed out, that timing is critical for a magneto, but if you have a distributor you can work around it by pulling the T shaft out of the drive and resetting it.
Image
If you are not part of the solution,
you are part of the problem!!!

User avatar
randallc
5+ Years
5+ Years
Posts: 1703
Joined: Tue Jan 18, 2011 9:16 am
Zip Code: 72940
Tractors Owned: 1951 Farmall Cub, 152 disk plow, 2 gang disk, belly mower, sickle mower
1949 Farmall Cub, cultivator, moldboard plow, disk,front blade. Cub Cadet, LTX1045 Mower. Cub Cadet's 109, 125, 1000, and 1250
1961 cub c2 belly mower and full blade. 48 cub manual lift with cultivators.
Circle of Safety: Y
Location: Witcherville, AR

Re: Governor timing and magneto

Postby randallc » Mon May 19, 2014 5:23 am

Welcome to the forum from Arkansas. This is a good place to spend a little time.
Guinea, 1951 Farmall Cub; Jumping Willy, 1949 Farmall Cub, 61 Cub, Scrapy, and 48 Cub Al, 48 cub, Billy D.
Image

User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
Posts: 22183
Joined: Sun Feb 02, 2003 2:09 pm
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
Location: Mo, Potosi

Re: Governor timing and magneto

Postby John *.?-!.* cub owner » Mon May 19, 2014 9:43 am

Note, if the governor is timed right, the drive slots will be in this position when any piston is at TDC.

Image
If you are not part of the solution,
you are part of the problem!!!

28plymouthman
Posts: 6
Joined: Sun May 18, 2014 1:20 pm
Zip Code: 44666
Tractors Owned: Farmall Cub 1949

International 504
Location: North Lawrence, Ohio

Re: Governor timing and magneto

Postby 28plymouthman » Mon May 19, 2014 5:46 pm

Thank you for all your replies. At first I had the two dots on the front of the cam gear with the governor one dot in the middle . That did not work. I pulled it back apart and found the one dot on the mag side of the cam gear and matched it with the one dot on the governor gear. Then the mark on the casting lined up with the 2 & 8 position for the mag. Yes I did have it on TDC with compression. Well it ;started right up and runs great. I am having a little issue with the governor adjustment speed but will figure it out. What a great web site foruum. Thanks again.

User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
Posts: 22183
Joined: Sun Feb 02, 2003 2:09 pm
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
Location: Mo, Potosi

Re: Governor timing and magneto

Postby John *.?-!.* cub owner » Mon May 19, 2014 6:01 pm

Check the shaft that goes across behind the radiator. It just slips into the fitting where the spring is on the governor, and is kept lined up by a key way. If it gets even a little wear in that joint it makes governor response sloppy.
If you are not part of the solution,
you are part of the problem!!!

farmergiffIV
Cub Star
Cub Star
Posts: 118
Joined: Sat Aug 17, 2013 8:36 pm
Zip Code: 97526
Tractors Owned: 1948 Farmall Cub
1953 Farmall Cub
Location: Oregon

Re: Governor timing and magneto

Postby farmergiffIV » Fri May 05, 2017 7:32 pm

John *.?-!.* cub owner wrote:Check the shaft that goes across behind the radiator. It just slips into the fitting where the spring is on the governor, and is kept lined up by a key way. If it gets even a little wear in that joint it makes governor response sloppy.


If the the fitting where the spring connect is slightly loose on the shaft can you replace the key way to tighten it? Mine is slightly loose on my cub.
Raptor Creek Farm

User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
Posts: 22183
Joined: Sun Feb 02, 2003 2:09 pm
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
Location: Mo, Potosi

Re: Governor timing and magneto

Postby John *.?-!.* cub owner » Fri May 05, 2017 8:11 pm

I used Loctite on mine if it is only a little loose.
If you are not part of the solution,
you are part of the problem!!!

Bob McCarty
Team Cub
Team Cub
Posts: 8270
Joined: Tue May 25, 2004 8:02 pm
Zip Code: 80501
Tractors Owned: Cubs, MH Pony, Shaw, Allis G, 1934 Silver King, JD LA and LI, Gibson D, David Bradley Tri-Trac
Circle of Safety: Y
Location: CO, Longmont

Re: Governor timing and magneto

Postby Bob McCarty » Fri May 05, 2017 8:25 pm

farmergiffIV wrote:
If the the fitting where the spring connect is slightly loose on the shaft can you replace the key way to tighten it? Mine is slightly loose on my cub.

Usually you will need to either shim the keyway or use JB Weld to "glue" it in to remove the slop.

Bob
"We don't need to think more,
we need to think differently."
-Albert Einstein

farmergiffIV
Cub Star
Cub Star
Posts: 118
Joined: Sat Aug 17, 2013 8:36 pm
Zip Code: 97526
Tractors Owned: 1948 Farmall Cub
1953 Farmall Cub
Location: Oregon

Re: Governor timing and magneto

Postby farmergiffIV » Sat May 06, 2017 10:15 pm

I am going to be pulling off my governor now I am pretty sure its not in tune. When at 1st cylinder TDC the punch of the fan pulley does not coordinate to 8 and 2 on the governor.

Got any tips for someone before they remove the governor for the first time? I am going to read the IH shop manual first.
Raptor Creek Farm

User avatar
Glen
5+ Years
5+ Years
Posts: 1914
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Governor timing and magneto

Postby Glen » Sun May 07, 2017 1:30 am

Hi,
If you are taking the governor out, look at the pins that hold the 2 weights on, check for wear, the holes in the weights could be worn too. Wear there makes the governor work bad, if there is enough wear. Check for any parts that look worn.
Here is a page from the Cub parts manual showing the governor, be sure the bearing number 23 in the pic is assembled right, it has 3 parts. :)

http://www.farmallcub.info/manuals/cub_ ... 012-18.jpg


  • Similar Topics
    Replies
    Views
    Last post

Return to “Farmall Cub”

Who is online

Users browsing this forum: No registered users and 2 guests