'57 Cub not starting after repaint

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.

'57 Cub not starting after repaint

Postby ksanders » Wed Jul 31, 2013 10:16 pm

Hey guys, did a 2/3 restoration on a 1957 white grill Cub, meaning only fixed the glaring issues but gave it a complete teardown and quality repaint. Anyway, got it all together and it won't start.

Work done relevant to issue to answer questions ahead of time:
New rings and rod bearings, didn't touch valves or have crank/cam or distributor out.
New copper core plug wires, not composite or whatever they are.
Rewired per operator's manual and double checked after issue started. New regulator.

Symptoms:
Turns over but won't start. Tries to catch and will even start a second but gas spits out of carb air intake tube (took it off to see what's going on). Spark tester shows spark to all plugs. Plenty of gas getting to it as it smells flooded. I looked at rotor and its in right. Fiddled with the timing back and fourth. Double and triple-checked plug wire locations per threads on this forum and my other Farmall Letter series tractors convinced that was the issues but they appear to be on right. I thought maybe a valve sticking but I went way beyond typical clean-up insuring no carbon was left in valve seats when cleaning up to avoid another tear=down.

I plan to check compression on each cylinder tomorrow and double check TDC with #1 cylinder and rotor location while at TDC. Should tell me if I have to tear down for a valve or head gasket seating or something. Otherwise what else am I missing? It ran fine before tear-down and repaint, I didn't touch the timing so that shouldn't be it, and rebuilt carb and had it running BEFORE tear-down so shouldn't be carb. I would think it has to be in the distributor, wires, or compression but even if a valve was sticking I've seen Cubs run on two cylinders with broken cranks and 3 would still be working if one valve happened to have carbon under it.
ksanders
 
Posts: 34
Joined: Wed Dec 10, 2008 5:58 pm
Location: Memphis, IN
Zip Code: 47143
Tractors Owned: '67 Lo-Boy
(2) 154's
185
'47 Cub
'55 Cub Lo-Boy

Re: '57 Cub not starting after repaint

Postby Jason (IL) » Thu Aug 01, 2013 6:51 am

Try and pull start it. I bet that helps.
Jason (IL)
501 Club
501 Club
 
Posts: 817
Joined: Sun Feb 02, 2003 10:44 pm
Location: Gibson City, IL
Zip Code: 60936
Tractors Owned: 47 Cub SN 8664
48 Cub
50 Demo
54 Cub
55 Cub
2-56 Cub
55 LOBOY SN 876
57 LOBOY
2- 60 LOBOY
54 Super M
57 300LP
57 450
Cub Cadet 123
Circle of Safety Award
Circle of Safety: Y

Re: '57 Cub not starting after repaint

Postby Eugene » Thu Aug 01, 2013 6:58 am

Check valve tappet clearance. It that's not the problem then the compression tests.
I have an excuse. CRS.
Eugene
Team Cub Mentor
Team Cub Mentor
 
Posts: 12124
Joined: Fri Jul 02, 2004 9:52 pm
Location: Mo. Linn
Zip Code: 65051
Circle of Safety Award
Circle of Safety: Y

Re: '57 Cub not starting after repaint

Postby Hengy » Thu Aug 01, 2013 12:39 pm

I second what Jason said above. If you have triple and quadruple checked the timing and plug wire location and are not getting a backfire when you try to crank it, then I am willing to bet that a pull start for the first fire will make it start right up. Merlin did just that every time that I tore into the engine (twice) and after a pull start the first time, he would then start right up on the first pull of the starter with no choke.

BE CAREFUL when pulling and only hook to the drawbar on the rear when you are pulling. Put the tractor in 3rd gear and have the person pulling you go really slowly and watch you at all times. If the tractor comes to life, make sure that you don't run up on the rear of the pulling vehicle...

Be safe, but give it a shot!

Mike
Mike (Happy as a Lark in Allison Park, PA)
Image Image

Check out my Restoration Thread (1955 Cub, Lewis)
User avatar
Hengy
501 Club
501 Club
 
Posts: 6959
Joined: Sat Feb 18, 2006 8:12 pm
Location: PA, Allison Park (Am Hengelsberg)
Zip Code: 15101
eBay ID: lacrosseorgans
Skype Name: Mike.Hengelsberg
Tractors Owned: 1949 Cub "Merlin"
1955 Cub "Lewis"
Cub Trailer
A-60 Blade
Cub-22 Mower
193 Plow
Circle of Safety Award
Circle of Safety: Y

Re: '57 Cub not starting after repaint

Postby muleboss » Thu Aug 01, 2013 5:29 pm

Sounds like intake leak possible.
muleboss
501 Club
501 Club
 
Posts: 741
Joined: Sat Dec 10, 2005 4:31 pm
Location: KS. Burlington
Zip Code: 66839
Circle of Safety Award
Circle of Safety: Y

Re: '57 Cub not starting after repaint

Postby ksanders » Thu Aug 01, 2013 8:23 pm

I've pulled my fair share of tractors and always park them close to a hill "just in case". Didn't have much time to work on it tonight but did find the problem. Started with compression test to ease my mind and no compression on cylinder 3 :headbang . Reluctantly pulled the hood and was thankful I tap all threads upon reassembly on my restorations. Looked down the plug hole before I pulled the head and stuck valve (one closest to the rear of tractor). Tried to lightly tap it to see if I could get lucky and not have to pull everything off to get head off but it was tight. It worked fine upon reassembly so don't know if it was carbon that snuck in or antifreeze sneaking in and seizing it since reassembly or what. I shot gas in there through the plug hole and slowly got it to budge trying not to damage valve. Worked it up and down about 10 times tapping it lightly with a soft punch then turning motor over to push it up. Finally it just popped back down right and worked. Hit the starter without the hood off and it fired right up and ran right. Ran out of time with work tomorrow to get it all together but it ran decent. Now I can tune in the distributor perfect and watch the new paint smoke off the exhaust as I get it all tuned in and try. Worst part is over though.

Thanks for the help. I guess the least I could do is show a before (month and a half ago) and after pic of it. First actual Farmall Cub I've redone in 10 years. Tried something new and did some parts in blue including making custom covers in blue just to change it up a bit. Did a bunch of Cub Cadets and other big tractors but missed having a Cub. Enjoyable little underpowered things to rake hay and mess with.
Attachments
IMG-20130728-00051.jpg
After
IMG-20130728-00051.jpg (120.52 KiB) Viewed 114 times
IMG_20130618_172818.jpg
Before
IMG_20130618_172818.jpg (54.47 KiB) Viewed 114 times
ksanders
 
Posts: 34
Joined: Wed Dec 10, 2008 5:58 pm
Location: Memphis, IN
Zip Code: 47143
Tractors Owned: '67 Lo-Boy
(2) 154's
185
'47 Cub
'55 Cub Lo-Boy

Re: '57 Cub not starting after repaint

Postby dgrapes59 » Thu Aug 01, 2013 9:53 pm

Kevin,

Glad you got it figured out!

You did a nice job on the paint, so hopefully it will now run as good as it looks!
David
User avatar
dgrapes59
501 Club
501 Club
 
Posts: 2609
Joined: Sun Jul 13, 2008 10:05 pm
Location: OH, Liberty Township (45044) (southwest OH)
Zip Code: 45044
Tractors Owned: 1951 Cub
1955 Loboy
a few plows, mowers, blades & such
Several '61 CC Originals, CC Narrow Frames- 70 & 100's, 71, Couple 102's & 122's, 72, 124, 73, various CC options & implements #2 Trailer, 1963 Springfield
Circle of Safety Award
Circle of Safety: Y


Return to Farmall Cub

Who is online

Users browsing this forum: Bob Triplett, jpcubs and 5 guests