New to forum great info
I bought a 1950 cub no smoke or miss but at idle about every 5 to 10 seconds it sputters and when it does it sucks in through exhaust. High speed seems to be ok no problems under load. I checked jets all clean the guy i bought it from said he just did a tune up. What could be causing this i dont think its a burnt valve because it doesn't do it constantly. I'm thinking more in the lines of a sticky valve or weak valve springs.
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sputters and sucking in through exhaust
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- 5+ Years
- Posts: 51
- Joined: Tue Mar 13, 2018 6:10 am
- Zip Code: 07847
- Tractors Owned: 1950 Cub
54 Blade
- Willy
- 5+ Years
- Posts: 519
- Joined: Sun Oct 22, 2017 4:54 pm
- Zip Code: 38330
- Tractors Owned: 1951 Cub Lil Red
- Location: Dyer, TN
Re: sputters and sucking in through exhaust
Mine's been doing that but it runs good, so it's something I keep an eye on just in case.
- Urbish
- 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: sputters and sucking in through exhaust
I'd say sticky valve. Very easy to remove tappet cover and watch the valvetrain action while turning it over.
Jim
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- 5+ Years
- Posts: 51
- Joined: Tue Mar 13, 2018 6:10 am
- Zip Code: 07847
- Tractors Owned: 1950 Cub
54 Blade
Re: sputters and sucking in through exhaust
thanks will look into that i just check points they were off a little and coil was hooked up backwards neg to points. will post outcome.
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- 5+ Years
- Posts: 605
- 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: sputters and sucking in through exhaust
All of mine have negative post going to.distributor.
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
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
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- 5+ Years
- Posts: 51
- Joined: Tue Mar 13, 2018 6:10 am
- Zip Code: 07847
- Tractors Owned: 1950 Cub
54 Blade
Re: sputters and sucking in through exhaust
from what i understand is with + ground the distributor is suppose to go to + side is this correct. anyway it still sputters must be valve related. i haven't checked for sticky valve yet
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- 10+ Years
- Posts: 4974
- Joined: Fri Oct 29, 2010 11:34 pm
- Zip Code: 36558
- Tractors Owned: Cubs: (3)'49's, (1 is for parts), (1)'57 IH Cub LoBoy w/FH, (2)154 Number Series Loboys, (1 is for parts), '76 Longstripe w/FH, Mowers: C-22, Bush Hog 412, Pennington 59, Woods RM42CF, Woods 42, assorted FCub plows, planters, discs, etc. OTHERS: '49 AC B & Ind. Sickle mower, '61 AC D12 Ser 2, '52 8N, '56 Ferguson 35 Deluxe, '47 & '49 Avery V, '53 MM BG (offset), '51 JD M (regular), '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76? Yanmar 2TR15 1500 & Bush Hog SQ42S-2 mower, '78? FORD Dexta, '86 FORD LGT14D & 48" Mower, (2)Cub Cadets & Mowers (MTD), (4) Sears Surburban's, other MTD mowers, Jeeps & other misc. "treasures"
- Circle of Safety: Y
- Location: AL (Southwest)
Re: sputters and sucking in through exhaust
Is the tractor pos ground or neg ground? Coil should be connected the same way as the battery.
Stan in LA (lower AL)
USAF & Reserves, Reg ARMY, ARMY NG (AL)
USAF & Reserves, Reg ARMY, ARMY NG (AL)
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