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.

Spits, Sputters, Dies Under Load

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.
User avatar
AgTires4295
10+ Years
10+ Years
Posts: 197
Joined: Fri Dec 30, 2011 7:36 pm
Zip Code: 20646
Tractors Owned: 1940 Farmall A
1947 Farmall H
1951 Farmall Cub
1970 Cub Cadet 127
1970 Simplicity Broadmoor 728 (x2)
1984 Cub Cadet 782
1964 Simplicity Landlord
2014 Simplicity Broadmoor 23/50
Location: La Plata, MD

Spits, Sputters, Dies Under Load

Postby AgTires4295 » Tue Sep 04, 2018 2:07 pm

1951 Cub.

Pretty frustrated.

I've been cutting about 3 acres of grass with this Cub for a few years now and have never had electrical issues (electrical being my opinion) like I have had recently.

I initially thought it to be a coil since it gets hot and the engine sputters and dies (makes sense right?). Installed new coil. Same thing.

New condenser/points (gapped properly). Same thing.

Took apart generator (just for the heck of it) and put it back together with good cleaning (brushes still good although not putting out much charge). Same thing.

Took apart carb and cleaned (thinking it could be fuel related). Same thing.

What gremlin am I chasing???

All grounds seem fine. Connections good. I'm stumped and have a long walk home for the 4295th time.

Once it cools off, it starts again without one hiccup.
Image
1940 Farmall A
1947 Farmall H
1951 Farmall Cub

SPONSOR AD

Sponsor



Sponsor
 

User avatar
Urbish
10+ Years
10+ Years
Posts: 2427
Joined: Sat Sep 07, 2013 3:45 pm
Zip Code: 48158
Tractors Owned: ~
1958 International Cub LoBoy
1947 Farmall H
1946 Farmall B
1953 Willys CJ3B
2022 Massey Ferguson GC1723E Subcompact

Cub Loboy L-54 Leveling and Grader Blade
Circle of Safety: Y
Location: Manchester, MI

Re: Spits, Sputters, Dies Under Load

Postby Urbish » Tue Sep 04, 2018 2:23 pm

6V or 12V? Do you have a resistor on the coil?
Jim

Circle of Safety

User avatar
AgTires4295
10+ Years
10+ Years
Posts: 197
Joined: Fri Dec 30, 2011 7:36 pm
Zip Code: 20646
Tractors Owned: 1940 Farmall A
1947 Farmall H
1951 Farmall Cub
1970 Cub Cadet 127
1970 Simplicity Broadmoor 728 (x2)
1984 Cub Cadet 782
1964 Simplicity Landlord
2014 Simplicity Broadmoor 23/50
Location: La Plata, MD

Re: Spits, Sputters, Dies Under Load

Postby AgTires4295 » Tue Sep 04, 2018 2:33 pm

6v (that would have been great to publish in the initial post). I don't believe it has a resistor as the original one does not but I don't know for sure.
Image
1940 Farmall A
1947 Farmall H
1951 Farmall Cub

indy61
10+ Years
10+ Years
Posts: 1425
Joined: Fri Jan 25, 2008 9:02 am
Zip Code: 00000
Circle of Safety: Y

Re: Spits, Sputters, Dies Under Load

Postby indy61 » Tue Sep 04, 2018 2:38 pm

As soon as it starts to sputter pull the choke, if it helps than fuel.

User avatar
AgTires4295
10+ Years
10+ Years
Posts: 197
Joined: Fri Dec 30, 2011 7:36 pm
Zip Code: 20646
Tractors Owned: 1940 Farmall A
1947 Farmall H
1951 Farmall Cub
1970 Cub Cadet 127
1970 Simplicity Broadmoor 728 (x2)
1984 Cub Cadet 782
1964 Simplicity Landlord
2014 Simplicity Broadmoor 23/50
Location: La Plata, MD

Re: Spits, Sputters, Dies Under Load

Postby AgTires4295 » Tue Sep 04, 2018 4:44 pm

I'll try that but I truly believe it's something electrical. The carb was near spotless and I blew out the jet. I ensured proper fuel flow with the float, needle, etc... All good. It runs perfectly (sound like a sewing machine) when cold and fires up immediately. It's only when I've been cutting for a few minutes that it starts to sputter and dies 5-10 seconds later.

If I let it sit in the field overnight, it starts, no issues. If I try to start it after it sputters out, it just cranks and cranks and cranks. Every now and then, a cylinder will fire after it sputters out but nothing to sustain a start. If it does start after a few minutes, it's always on full throttle only.
Image
1940 Farmall A
1947 Farmall H
1951 Farmall Cub

indy61
10+ Years
10+ Years
Posts: 1425
Joined: Fri Jan 25, 2008 9:02 am
Zip Code: 00000
Circle of Safety: Y

Re: Spits, Sputters, Dies Under Load

Postby indy61 » Tue Sep 04, 2018 4:54 pm

Sounds like a fuel issue to me. Maybe I've been lucky but I've never had an electrical problem cause those symptoms.

User avatar
Glen
10+ Years
10+ Years
Posts: 6096
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: Spits, Sputters, Dies Under Load

Postby Glen » Tue Sep 04, 2018 5:23 pm

Hi AgTires4295,

You could look at the gas cap vent holes. The gas won't flow if the vent holes are plugged.
If it is an original style cap, there is one hole on the top, and 2 holes on the bottom side. Use a small wire, and clean them if needed.
You might have the newer, free replacement cap, from Case IH.

When it quits running, loosen the cap and see if it works then. :)

Below are pics from TM tractor of the original style cap. The vent holes on the bottom side, in the 2nd pic, are at about 2 and 8 oclock.

http://www.tmtractor.com/tm-tractor/gfl/fuelcap_001.htm
Last edited by Glen on Tue Sep 04, 2018 5:30 pm, edited 1 time in total.

User avatar
AgTires4295
10+ Years
10+ Years
Posts: 197
Joined: Fri Dec 30, 2011 7:36 pm
Zip Code: 20646
Tractors Owned: 1940 Farmall A
1947 Farmall H
1951 Farmall Cub
1970 Cub Cadet 127
1970 Simplicity Broadmoor 728 (x2)
1984 Cub Cadet 782
1964 Simplicity Landlord
2014 Simplicity Broadmoor 23/50
Location: La Plata, MD

Re: Spits, Sputters, Dies Under Load

Postby AgTires4295 » Tue Sep 04, 2018 5:30 pm

Glen! Great hearing from you! I'm wondering if you're right! It could be a vapor-lock situation! It's absolutely the original fuel cap. I wouldn't doubt it having been clogged since the farm animals are always laying a layer of barn dust across it.

I'll replace with one from another Farmall just to see if that helps.

Crossing my fingers!
Image
1940 Farmall A
1947 Farmall H
1951 Farmall Cub

User avatar
AgTires4295
10+ Years
10+ Years
Posts: 197
Joined: Fri Dec 30, 2011 7:36 pm
Zip Code: 20646
Tractors Owned: 1940 Farmall A
1947 Farmall H
1951 Farmall Cub
1970 Cub Cadet 127
1970 Simplicity Broadmoor 728 (x2)
1984 Cub Cadet 782
1964 Simplicity Landlord
2014 Simplicity Broadmoor 23/50
Location: La Plata, MD

Re: Spits, Sputters, Dies Under Load

Postby AgTires4295 » Tue Sep 04, 2018 6:07 pm

Well I was so excited at the thought of a mere vapor-lock situation that I ran outside, fired it up and headed to the field.

Same story only I made it about 10 minutes under load this time before it surged, sputtered at died. Luckily, it started immediately again and I'm able to keep going. The coil is generating a great spark and I've got good fuel flow (I think)...

What gives?

Thinking there may be a restriction in the fuel bowl (?). I may have to delete it to find out. I was hoping to keep it as stock as possible but this may be the first step in the other direction.

It definitely is starved for fuel now that I'm putting two and two together.
Image
1940 Farmall A
1947 Farmall H
1951 Farmall Cub

inairam
5+ Years
5+ Years
Posts: 2803
Joined: Wed Jul 08, 2015 10:24 am
Zip Code: 19342
Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1974 Horse II 12 v c-2
1975 with woods 42-6 12 v - Horse
1979 long strip 12 v stuck engine
130 with international 1000 loader 6 v
1969 140 with bush hog tow behind mower 12 v
Terramite T-6 4WD Backhoe Perkins diesel
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
Circle of Safety: Y
Location: Glen Mills PA

Re: Spits, Sputters, Dies Under Load

Postby inairam » Tue Sep 04, 2018 6:14 pm

Agtires

I would also consider adjusting the valves ( because it probably needs it), the timing with a light, and the linkage between the carb and the governor and maybe the governor spring.

If the governor/ linkage is not reacting fast enough or property the carb and the electrical can be perfect but it will stumble under load.
When you only have 9 horsepower you need to know the names of all of the ponies!

User avatar
AgTires4295
10+ Years
10+ Years
Posts: 197
Joined: Fri Dec 30, 2011 7:36 pm
Zip Code: 20646
Tractors Owned: 1940 Farmall A
1947 Farmall H
1951 Farmall Cub
1970 Cub Cadet 127
1970 Simplicity Broadmoor 728 (x2)
1984 Cub Cadet 782
1964 Simplicity Landlord
2014 Simplicity Broadmoor 23/50
Location: La Plata, MD

Re: Spits, Sputters, Dies Under Load

Postby AgTires4295 » Tue Sep 04, 2018 6:23 pm

I'll have to see how to adjust the valves (uncharted territory there) but I'm sure every little bit of fine-tuning helps with this little machine. As far as I know it's NEVER been done.

Great pointers
Image
1940 Farmall A
1947 Farmall H
1951 Farmall Cub

indy61
10+ Years
10+ Years
Posts: 1425
Joined: Fri Jan 25, 2008 9:02 am
Zip Code: 00000
Circle of Safety: Y

Re: Spits, Sputters, Dies Under Load

Postby indy61 » Tue Sep 04, 2018 6:28 pm

The stock sediment bowl screen and carb inlet screen is not adequate in my opinion. I was only able to achieve good filtration after adding an inline filter and altering the sediment bowl with a screen at the fuel tank outlet.

ntrenn
10+ Years
10+ Years
Posts: 804
Joined: Tue Apr 17, 2012 7:55 pm
Zip Code: 47119
Skype Name: ntrenn
Tractors Owned: 63 Cub 221833 in family since '69
65 Lo-boy 19648 with an un-stuck #4 - it lives!!!
144 Cultivators with disc hillers
193 Plow
42C mower
59L mower mounted on the Fcub
23A Disc - lost possession
Circle of Safety: Y
Location: Indiana

Re: Spits, Sputters, Dies Under Load

Postby ntrenn » Tue Sep 04, 2018 6:40 pm

Must be the weather....my 65 just started doing something similar throw the load on too fast and it sputters and dies. I was able to finish the yard but had a couple of 10 minute rests.

User avatar
Glen
10+ Years
10+ Years
Posts: 6096
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: Spits, Sputters, Dies Under Load

Postby Glen » Tue Sep 04, 2018 7:04 pm

Hi,
The gas strainer under the gas tank needs cleaning at the hour recommendation in the owner's manual.
I would clean it, if you haven't lately.
The strainer has a fine screen in the top, above the gasket.
If the gasket is old, it might not seal again, if you try to reuse it.

Below is a page from the Cub owner's manual showing the strainer.

http://farmallcub.com/rudi_cub/www.clea ... e%2025.jpg

It is easier to get to the strainer if you move the Touch Control arms the rear position first.

Below are listings at TM Tractor, you can look at.

http://www.tmtractor.com/new/fl/426fp.htm

http://www.tmtractor.com/new/fl/235fp.htm

You could remove the small plug on the bottom of the carburetor, under where the float is, and check the gas flow. Catch it in a clean can, and you can put it back in the gas tank later.
Check the flow for about 1 minute. The flow should be steady, and not stop. At first probably a lot will come out, that is what is in the carb. :)

I've read on here that you have to be careful adding an in line filter to a Cub, some of them slow down the fuel flow too much. The filter has to be for a gravity feed fuel system, not something with a fuel pump.
Last edited by Glen on Tue Sep 04, 2018 7:55 pm, edited 1 time in total.

User avatar
Slim140
5+ Years
5+ Years
Posts: 4908
Joined: Wed Nov 22, 2017 6:24 am
Zip Code: 00000
Tractors Owned: .
1970 International 140
1972 International 140
1949 John Deere A
1993 Ford 4630 W/Loader
1965 John Deere 110
1961 Cub Cadet Original
Circle of Safety: Y

Re: Spits, Sputters, Dies Under Load

Postby Slim140 » Tue Sep 04, 2018 7:12 pm

Glen wrote:I've read on here that you have to be careful adding an in line filter to a Cub, some of them slow down the fuel flow too much. The filter has to be for a gravity feed fuel system, not a car, with a fuel pump.

Glen, the in-line filters people have trouble with are for small engines with fuel pumps. Don’t want anyone getting confused if they go buy one. I know Briggs & Stratton have 2 different ones for sure.
Every home is a school, what are you teaching?

Circle of Safety


Return to “Farmall Cub”

Who is online

Users browsing this forum: Tom Clark and 25 guests