Hard to start

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.
Thomas505
5+ Years
5+ Years
Posts: 13
Joined: Sun Oct 31, 2010 5:24 pm
Zip Code: 06082

Hard to start

Postby Thomas505 » Wed Jan 05, 2011 8:32 am

I purchased a Cub a few months ago. It runs great when I can get it started. Ever since the weather got cold it is impossible to start. I tried yesterday for about 1/2 hour, but could not get it going. It is stored inside a barn and not in the elements. I am wondering if I should shut off the fuel rather than leaving it on. Any help would be apppreciated

User avatar
Bigdog
Cub Pro
Cub Pro
501 Club
501 Club
Posts: 24066
Joined: Sun Feb 02, 2003 12:50 pm
Zip Code: 43113
Circle of Safety: Y
Location: OH, Circleville

Re: Hard to start

Postby Bigdog » Wed Jan 05, 2011 8:43 am

Cover the basic items first - as mentioned in several other threads do a complete tune-up. Most hard starting issues are related to the lack of proper routine maintenance and a regular tune-up is part of that.
While cranking the engine over check the spark quality. A weak spark at the plugs is often a cause of hard starting.
As to whether or not to turn off the gas - many do that as a routine procedure since a lot of cubs suffer from a slightly leaky float valve. If you do not see evidence of fuel drips from your cub just setting around then it is probably not necessary to shut the fuel off.
If a tune-up does not correct your hard starting problem I would suggest a compression test to get some idea of the condition of your engine.
Bigdog
If you can't fix it with a hammer, you've got an electrical problem.

My wife says I don't listen to her. - - - - - - - - Or something like that!

Image

http://www.cubtug.com

Thomas505
5+ Years
5+ Years
Posts: 13
Joined: Sun Oct 31, 2010 5:24 pm
Zip Code: 06082

Re: Hard to start

Postby Thomas505 » Wed Jan 05, 2011 3:07 pm

The cub has a new coil, points and condenser and the spark is good. I didn't check the spark plugs and they might be a possible problem. I did not see any evidence of a fuel leak or drip, I just thought this might be the issue. I have a friend who is a mechanic and he said, " Cubs are all hard to start when its cold". I not sure that everyone who ownes a cub can't get it started in cold weather. I will check the plugs and go from there

User avatar
Don McCombs
Team Cub Mentor
Team Cub Mentor
501 Club
501 Club
Posts: 12100
Joined: Mon Feb 03, 2003 6:45 am
Zip Code: 21550
Tractors Owned: "1950 Something" Farmall Cub
1957 Farmall Cub w/FH
1977 International Cub w/FH
1978 International Cub
1948 Farmall Super A
1951 Farmall Super C w/FH
Circle of Safety: Y
Location: MD, Deep Creek Lake

Re: Hard to start

Postby Don McCombs » Wed Jan 05, 2011 3:13 pm

One thing not mentioned yet is the battery. Make sure the fluid is topped off and it is fully charged. Unless you have put a new battery in the tractor, you may want to get the battery load tested.
Don McCombs
MD, Deep Creek Lake

Image
Proud Member of Maryland Chapter 39

User avatar
Bigdog
Cub Pro
Cub Pro
501 Club
501 Club
Posts: 24066
Joined: Sun Feb 02, 2003 12:50 pm
Zip Code: 43113
Circle of Safety: Y
Location: OH, Circleville

Re: Hard to start

Postby Bigdog » Wed Jan 05, 2011 3:20 pm

Also - can you tell us how you are applying the choke? Most cubs need a little choke in cold weather. Most of mine take full choke for a couple of turns of the starter until it fires and then about half choke for about 45 seconds to a minute or so before it will smooth out.
Too much choke for too long will cause flooding and not enough choke seems to be too lean to start.
Bigdog
If you can't fix it with a hammer, you've got an electrical problem.

My wife says I don't listen to her. - - - - - - - - Or something like that!

Image

http://www.cubtug.com

Thomas505
5+ Years
5+ Years
Posts: 13
Joined: Sun Oct 31, 2010 5:24 pm
Zip Code: 06082

Re: Hard to start

Postby Thomas505 » Wed Jan 05, 2011 3:31 pm

I do pull out the choke for just a couple of turns and push it in immediately. Sometimes the it will start, only run for a few seconds, there doesn't seem to be anything I can do to keep it running. I did notice if I choke it for too long, it floods very easy

ScottyD'sdad
Cub Pro
Cub Pro
501 Club
501 Club
Posts: 6151
Joined: Thu Aug 31, 2006 7:00 pm
Zip Code: 02769
Tractors Owned: 6"F" cubs
5 lo-boys
1 154
1 184
1 IH444
1 Oliver OC3 crawler
1 AC D10
1 IH 100 manure spreader
1 IH model B corn grinder
3 power units
cub demonstrator
Circle of Safety: Y
Location: Ma. Rehoboth

Re: Hard to start

Postby ScottyD'sdad » Wed Jan 05, 2011 4:18 pm

How fresh is the fuel. Summer fuel doesn't vaporize enough in cold weather. Stale fuel, is even worse. Ed
Image
Member of Chapter 18, and National club

User avatar
Bigdog
Cub Pro
Cub Pro
501 Club
501 Club
Posts: 24066
Joined: Sun Feb 02, 2003 12:50 pm
Zip Code: 43113
Circle of Safety: Y
Location: OH, Circleville

Re: Hard to start

Postby Bigdog » Wed Jan 05, 2011 4:21 pm

I find in cold weather it is usually necessary to feather the choke off slowly to keep the engine running.
Bigdog
If you can't fix it with a hammer, you've got an electrical problem.

My wife says I don't listen to her. - - - - - - - - Or something like that!

Image

http://www.cubtug.com

Clark Thompson
10+ Years
10+ Years
501 Club
501 Club
Posts: 1558
Joined: Sun Feb 02, 2003 11:01 pm
Zip Code: 44425
Tractors Owned: I own a 1950 cub demo, 1948 farmall cub, 1944 International I-9, a 1976 internationl cub, a 1975 international cub with fast hitch roleover plow and disc. a 1962 JD-440 dozer with 253 detroit, a 1952 JD-B, a 1979 international 3200 skid loader, a 1957 international S-160 truck, a 1929 Mccormic deering 10-20, a 1952 case S0 tractor. a pennsylvaning meteor rgarden tractor and sevrial cub cadets.
Location: Hubbard Ohio

Re: Hard to start

Postby Clark Thompson » Sun Jan 09, 2011 3:01 pm

All good advise. I will go one step further. Have you checked the compression? It has been my experionce over the years that cub engines that have less than 90 lbs of compression will be hard to start in cold weather. Especially below 20 deg. I have 6 cubs here with all top notch rebuilt engines in them. They all start easy in zero deg weather. 3 are 6 volt. 3 are 12 volt. Have to feather the choke some too.
Collector of Farmall cubs and cub cadets.Injoy helping people keep their cubs running. Years of experipnce.

User avatar
Mike in Louisiana
10+ Years
10+ Years
501 Club
501 Club
Posts: 5518
Joined: Tue Feb 15, 2005 10:10 am
Zip Code: 71023
Circle of Safety: Y
Location: LA, Doyline

Re: Hard to start

Postby Mike in Louisiana » Sun Jan 09, 2011 3:47 pm

You did say that you changed the points. Just be sure you set them for distributor 20 or magneto 13 (i think) I have seen some look in the book and use the wrong setting.
1975 cub (LouAnn) serial # 245946, 1941 John Deere Model H

Good judgment comes from experience,
and a lot of that comes from bad judgment. Will Rogers


Return to “Farmall Cub”

Who is online

Users browsing this forum: COJACK and 7 guests