This site uses cookies to maintain login information on FarmallCub.Com. Click the X in the banner upper right corner to close this notice. For more information on our privacy policy, visit this link:
Privacy Policy

NEW REGISTERED MEMBERS: Be sure to check your SPAM/JUNK folders for the activation email.

Cub Timing Problems

The Cub Club -- Questions and answers to all of your Cub related issues.
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.
apprentice
10+ Years
10+ Years
Posts: 11
Joined: Sun Mar 24, 2013 7:42 pm
Zip Code: 77868

Cub Timing Problems

Postby apprentice » Sun Mar 24, 2013 7:52 pm

Cub has a mag. It runs perfect only, cylinder 1 is 4 on the dist. cylinder 2 is 1 on the dist. Cylinder 3 is 3 on the dist. Cylinder 4 is 2 on the dist. What is going on?? I have pulled the dist/ mag out 1000 times. Wires have to be crossed for it to run as good as it does.

SPONSOR AD

Sponsor



Sponsor
 

User avatar
Wakulla Bill
10+ Years
10+ Years
Posts: 358
Joined: Thu Jun 30, 2011 9:19 pm
Zip Code: 32327
Tractors Owned: Now
73 MF 165
63 MF 203 Ind
44 BF Avery "A" Project
51 Farmall Cub
49 Farmall Cub
48 Farmall Super A
Circle of Safety: Y
Location: Crawfordville, Fla

Re: Cub Timing Problems

Postby Wakulla Bill » Sun Mar 24, 2013 9:47 pm

Have you checked to see if the rotor is timed correctly? There are two raised marks on the gears that must lined up. Hope this helps. Welcome to the forum!!
Bill
"Work smarter; Not harder"

apprentice
10+ Years
10+ Years
Posts: 11
Joined: Sun Mar 24, 2013 7:42 pm
Zip Code: 77868

Re: Cub Timing Problems

Postby apprentice » Sun Mar 24, 2013 9:54 pm

Yes. The mark on the small gear is aligned to the mark on the rotor gear.

Eugene
Team Cub Mentor
Team Cub Mentor
Posts: 20344
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: Cub Timing Problems

Postby Eugene » Sun Mar 24, 2013 10:14 pm

I have 8 different sketches trying to figure out the presented firing order. Firing order is 1, 3, 4, 2 with number 1 cylinder plug wire at the 12 o'clock position on the distributor. Running clock wise from the operators seat.

Operator's manual for your tractor, free down load, manuals at top of this page, has pictures of the correct magneto spark plug wire locations.

Should your spark plug wires not be in the correct location - and yet the tractor runs great - you have two choices. Either leave things alone or retime the rotor location within the magneto's distributor.
I have an excuse. CRS.

Eugene
Team Cub Mentor
Team Cub Mentor
Posts: 20344
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: Cub Timing Problems

Postby Eugene » Sun Mar 24, 2013 10:20 pm

apprentice wrote:Yes. The mark on the small gear is aligned to the mark on the rotor gear.
Remove magneto, back up drive lug 180 degrees, reinstall. Then reinstall the plug wires in the correct location - static time engine.
Last edited by Eugene on Sun Mar 24, 2013 10:20 pm, edited 1 time in total.
I have an excuse. CRS.

User avatar
Wakulla Bill
10+ Years
10+ Years
Posts: 358
Joined: Thu Jun 30, 2011 9:19 pm
Zip Code: 32327
Tractors Owned: Now
73 MF 165
63 MF 203 Ind
44 BF Avery "A" Project
51 Farmall Cub
49 Farmall Cub
48 Farmall Super A
Circle of Safety: Y
Location: Crawfordville, Fla

Re: Cub Timing Problems

Postby Wakulla Bill » Sun Mar 24, 2013 10:20 pm

The governor timing maybe incorrect. Check out this thread.
viewtopic.php?f=1&t=63072&p=515656&hilit=govenor+timing#p515656
"Work smarter; Not harder"

apprentice
10+ Years
10+ Years
Posts: 11
Joined: Sun Mar 24, 2013 7:42 pm
Zip Code: 77868

Re: Cub Timing Problems

Postby apprentice » Sun Mar 24, 2013 10:35 pm

If i remove the mag and mannuelly turn the drive prongs backwards 180 degrees the rotor then will be facing 180 out. Do i have to unbolt the rotor and rotate it 180? Then the marks on the rotor gear wont match up to the little drive gear. i believe there supposed to.

User avatar
Rick Spivey
Cub Pro
Cub Pro
Posts: 2778
Joined: Sun Jul 01, 2007 10:07 pm
Zip Code: 29518
Circle of Safety: Y
Location: SC, Cades 29518

Re: Cub Timing Problems

Postby Rick Spivey » Mon Mar 25, 2013 5:14 am

To fix it properly:

align cylinder 1 (closest to radiator) to TDC
remove mag, check that governor drive lugs are at app. 2 and 8 o'clock; if not, remove governor and correct
insure rotor and pinion are aligned (you state this is so, be sure)
install mag with rotor pointing as close as possible to #1
static time the engine

There are posts on here about correcting the governor (with pictures of correct), and static timing, if needed.
Rick Spivey
'52 Cub ("Great Personality") 148xxx
'48 Cub with FH ("Gunny Cub") 38xxx
'57 Lambretta (a slow work in progress)
'74 Triumph TR6 (Mama's toy)

apprentice
10+ Years
10+ Years
Posts: 11
Joined: Sun Mar 24, 2013 7:42 pm
Zip Code: 77868

Re: Cub Timing Problems

Postby apprentice » Mon Mar 25, 2013 6:49 am

Engine is at tdc of compression stroke. Rotor strait up and down. Both gears alligne d. Engine starts butthere is no throttle. Swap the #2 wire with #1 wireawireand everything is fine.

User avatar
Rudi
Cub Pro
Cub Pro
Posts: 28706
Joined: Sun Feb 02, 2003 8:37 pm
Zip Code: E1A7J3
Skype Name: R.H. "Rudi" Saueracker, SSM
Tractors Owned: 1947 Cub "Granny"
1948 Cub "Ellie-Mae"
1968 Cub Lo-Boy
Dad's Putt-Putt
IH 129 CC
McCormick 100 Manure Spreader
McCormick 100-H Manure Spreader
Post Hole Digger
M-H #1 Potato Digger
Circle of Safety: Y
Twitter ID: Rudi Saueracker, SSM
Location: NB Dieppe, Canada
Contact:

Re: Cub Timing Problems

Postby Rudi » Mon Mar 25, 2013 9:36 am

apprentice wrote:Engine is at tdc of compression stroke. Rotor strait up and down. Both gears alligne d. Engine starts butthere is no throttle. Swap the #2 wire with #1 wire and everything is fine.


Therein lies the problem: Rotor should be around 1 to 2 o'clock when at TDC on Compression Stroke. Timing is of if # 3 plug fires properly in the #1 tower.

Check out How To Understand Firing Order
Confusion breeds Discussion which breeds Knowledge which breeds Confidence which breeds Friendship


apprentice
10+ Years
10+ Years
Posts: 11
Joined: Sun Mar 24, 2013 7:42 pm
Zip Code: 77868

Re: Cub Timing Problems

Postby apprentice » Mon Mar 25, 2013 11:16 am

So I need to pull the mag. Rotate the. Drive lugs until rotor is at. One or two o'clock and make sure the marks are aligned on the two plastic gears. Is this what you are saying?

bythepond88
10+ Years
10+ Years
Posts: 1421
Joined: Sun Apr 30, 2006 2:54 pm
Zip Code: 60073
Circle of Safety: Y
Location: IL, Round Lake Heights

Re: Cub Timing Problems

Postby bythepond88 » Mon Mar 25, 2013 12:00 pm

apprentice wrote:So I need to pull the mag


Sort of. To fix it properly, you need to pull both the mag and the governor. Then reinstall the governor, so the slot on the back of the governor drive gear is at 2 and 8. As Rick suggested, do a search on the forum for one of the threads on reinstalling the governor. There are dots on the gears that need to be lined up. Then reinstall the mag and static time the mag.

Here's the page from the service manual that describes it, but there are threads that have actual pictures that are even better.
Image
Michael Cummings
Eddie - a 1959 International Lo-Boy named after my father in law, who who bought her new.

apprentice
10+ Years
10+ Years
Posts: 11
Joined: Sun Mar 24, 2013 7:42 pm
Zip Code: 77868

Re: Cub Timing Problems

Postby apprentice » Mon Mar 25, 2013 12:23 pm

The governor notches are at 2 & 8 wh en at tdc. Thhat has always been ok. When. I roll the engine over and stop it at tdc of comp. Stroke the rotor is pointing around 1 & 2 o'clock. This is why im confused. It will start and run but. Better if I swap #1 & #2 around.

Eugene
Team Cub Mentor
Team Cub Mentor
Posts: 20344
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: Cub Timing Problems

Postby Eugene » Mon Mar 25, 2013 1:49 pm

Engine runs - good - things are not to far off.

Roll engine over to #1 cylinder TDC. Then static time the magneto. Check rotor location - should point straight up to the #1 spark plug tower location on distributor cap. Check to see that the spark plug wires from the distributor cap are going to correct spark plug.
I have an excuse. CRS.

apprentice
10+ Years
10+ Years
Posts: 11
Joined: Sun Mar 24, 2013 7:42 pm
Zip Code: 77868

Re: Cub Timing Problems

Postby apprentice » Mon Mar 25, 2013 2:20 pm

Eugene. This is where my problem is. At tdc on #1 the rotor is point ing to number one .plug spot .wires have to ve swapped from #1 & #2cylinders to run correct . Why???


Return to “Farmall Cub”

Who is online

Users browsing this forum: CharlieK and 18 guests