Cub fuel

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.
Rwschwartz
Posts: 19
Joined: Thu Aug 23, 2018 11:16 pm
Zip Code: 72802
Tractors Owned: 1948 Farmall Cub
John Deere 4100
Location: Arkansas

Cub fuel

Postby Rwschwartz » Wed Aug 29, 2018 6:03 am

A farmall cub newbe here. I just purchased a 1948 farmall cub and wonder what you guys burn for fuel. I expect one should avoid gasoline containing ethanol for sure. But I wonder about unleaded gasoline. When the cubs were manufactured, leaded gasoline was the norm. Is it ok to burn unleaded or do I need some sort of lead additive?

jsfarmall
501 Club
501 Club
Posts: 594
Joined: Sat Oct 22, 2016 1:04 pm
Zip Code: 72454
Tractors Owned: 1948 Cub "Trusty"
1948 Cub "Rusty"
1948 Cub "Bob"
1948 Cub "Sallie" (wife's tractor)
1965 IH Cub "Annie"
1943 Farmall H
1953 Farmall Super M (granddad's tractor)

Re: Cub fuel

Postby jsfarmall » Wed Aug 29, 2018 6:08 am

You will get lots of replies "non ethanol only" and many like it. I don't think I have ever put non ethanol in my.tanks. no problems at all. When I get ready to shut em down for the year I run sta-bil in them all and never had an issue. Cubs ain't picky. They are 1947 technology. The modern oil makes up for the lead being took out.
1948 Cub "Trusty"
1948 Cub "Rusty" mower tractor, trimmed ear dash
1948 Cub "Bob"
1948 Cub "Sallie"
1965 IH Cub "Annie" mower tractor,
1943 Farmall H,
1953 Farmall Super M

User avatar
Shane N.
501 Club
501 Club
Posts: 3959
Joined: Wed Nov 22, 2017 6:24 am
Zip Code: 00000
Tractors Owned: .
1970 International 140 (Norman)
1972 International 140 (Keeferdoodle)
1949 John Deere A
1993 Ford 4630 W/Loader
1965 John Deere 110
1961 Cub Cadet Original

Sold Cubs..
1947 Cub #1447 (Arnold)
1949 Cub (Walt)
1950 Cub (piece of junk)
1952 Cub
Circle of Safety: Y
Location: N.C.

Re: Cub fuel

Postby Shane N. » Wed Aug 29, 2018 6:18 am

This subject has been discussed many times, use the search function at the top right and you can read more than your brain can handle this morning.
Every home is a school, what are you teaching?

Circle of Safety

Rwschwartz
Posts: 19
Joined: Thu Aug 23, 2018 11:16 pm
Zip Code: 72802
Tractors Owned: 1948 Farmall Cub
John Deere 4100
Location: Arkansas

Re: Cub fuel

Postby Rwschwartz » Wed Aug 29, 2018 6:26 am

Shane Nelson wrote:This subject has been discussed many times, use the search function at the top right and you can read more than your brain can handle this morning.

That ain't much. :?

User avatar
Shane N.
501 Club
501 Club
Posts: 3959
Joined: Wed Nov 22, 2017 6:24 am
Zip Code: 00000
Tractors Owned: .
1970 International 140 (Norman)
1972 International 140 (Keeferdoodle)
1949 John Deere A
1993 Ford 4630 W/Loader
1965 John Deere 110
1961 Cub Cadet Original

Sold Cubs..
1947 Cub #1447 (Arnold)
1949 Cub (Walt)
1950 Cub (piece of junk)
1952 Cub
Circle of Safety: Y
Location: N.C.

Re: Cub fuel

Postby Shane N. » Wed Aug 29, 2018 6:30 am

Rwschwartz wrote:
Shane Nelson wrote:This subject has been discussed many times, use the search function at the top right and you can read more than your brain can handle this morning.

That ain't much. :?

I know what you mean :lol:
Every home is a school, what are you teaching?

Circle of Safety

User avatar
MiCarl
Cub Star!!
Cub Star!!
Posts: 332
Joined: Sat Dec 16, 2017 8:28 am
Zip Code: 48154
Tractors Owned: 1944 Farmall H
1948 Farmall Cub
1994 Speedex 1631
Circle of Safety: Y
Location: Livonia, MI

Re: Cub fuel

Postby MiCarl » Wed Aug 29, 2018 6:48 am

The tetraethyl lead in gasoline served two purposes: It was an octane booster and the residue tended to protect valves and valve seats.

Gasoline today is a lot higher quality than you could find in 1948. Even the poorest grade gasoline you can find is going to be higher octane than the Cub engine needs. At the low RPMs and cool operating temperature of the C60 engine I doubt valve wear is much of an issue.

The big problem with ethanol in gasoline is the ethanol grabs moisture from the air. The moisture can cause rust in the tank and the carburetor jets. The moisture laden ethanol can also precipitate out in globs of slime that will plug up carburetor jets and passages. The moisture problem can be reduced by treating with sta-bil as jsfarmall said and storing with a full tank so there is less fuel-air contact. All my equipment which tends to sit for more than a week or two (snow blower, Cub, generator, mower off season, etc.) is parked with a full tank of fuel treated with sta-bil.

There is nothing wrong with ethanol free fuel, but I wouldn't drive very far or open the wallet very wide for it.
1948 Farmall Cub
1994 Speedex 1631

Rwschwartz
Posts: 19
Joined: Thu Aug 23, 2018 11:16 pm
Zip Code: 72802
Tractors Owned: 1948 Farmall Cub
John Deere 4100
Location: Arkansas

Re: Cub fuel

Postby Rwschwartz » Wed Aug 29, 2018 7:00 am

Thanks for the response. I'm used to burning non-ethanol in my small engines. It is quite a bit more expensive than gas with 10% ethanol, but readily available. I treat all fuel except for my autos with fuel stabilizer.

Crimson Tim
5+ Years
5+ Years
Posts: 372
Joined: Wed Feb 19, 2014 1:09 pm
Zip Code: 32736
Tractors Owned: The crew:
"John", 1952 Cub
"Paul", 1951 Cub
"George", 1958 LoBoy Cub with Wagner 45 Loader
"Ringo", 1977 Cub

So far, Paul and Ringo have arrived. John and George were supposed to follow ages ago, but apparently have gone awol. Long story.
Circle of Safety: Y

Re: Cub fuel

Postby Crimson Tim » Wed Aug 29, 2018 7:58 pm

I would say it depends on two things: your average ambient humidity and how long it is likely to sit with fuel in it.

I’m in Florida, so the humidity here is almost always high. Keeping small engines running even if used every week or two was a nightmare until I gave up and switched them to non-ethanol. Much less fighting since then.

I try to use non-ethanol in the Cub just to avoid any issues. I’m not too worried about it, though, because it gets used every couple days. If it sat, I’d be a lot more careful about it here.

User avatar
Urbish
5+ Years
5+ Years
Posts: 1823
Joined: Sat Sep 07, 2013 3:45 pm
Zip Code: 48158
Tractors Owned: ~
1958 International Cub LoBoy
1948 Farmall Cub
1947 Farmall H
1946 Farmall B
1953 Willys CJ3B

Cub-193 Moldboard Plow
Cub-54A Leveling and Grader Blade
Cub Loboy L-54 Leveling and Grader Blade
Unknown 5' Single Gang Disc Harrow
Circle of Safety: Y
Location: Manchester, MI

Re: Cub fuel

Postby Urbish » Wed Aug 29, 2018 8:43 pm

I've been running 87 octane pump gas (maximum 10% ethanol in MI) in my Cub for the last five years. I've never had the carburetor off the tractor nor have I had to clean it. I do not put any additives into the gas either. Sometimes it sits for a few weeks and other times it is run daily. I pay no attention to the fuel level when it is sitting. I just don't have any issues no matter what I do. The inside of the tank is as clean as a whistle. It does sit in an insulated building which I suppose smooths out the swings in temperature that it experiences while sitting. Maybe that has something to do with it.
Jim

Circle of Safety


  • Similar Topics
    Replies
    Views
    Last post

Return to “Farmall Cub”

Who is online

Users browsing this forum: No registered users and 3 guests