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engine backfire
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Dusty B
- 10+ Years
- Posts: 1880
- Joined: Wed May 23, 2007 7:35 am
- Zip Code: 61736
- Tractors Owned: '45 SC Case
- Circle of Safety: Y
- Location: IL, Downs
- Contact:
engine backfire
Engine starts and runs fine intermittently but backfires thru the carb every little bit! seems to do it less at faster speed but still does! Timing?? carb?? fuel supply?? seems like float does stick once in a while(Gary's fault!) but once running seems to run strong!! Using old wires, but would that cause the intermittent backfire?? Glad to just hear it run!!
Grandpa's '41 B
'56,,'57,'59, Cu'b
'45 C
'55 Case S
Dad's DB garden tractor
'48 DeSoto
'31 "A Coup
'79 Lincoln TC
God looks out for those of us who don't know how to look out for ourselves!
'56,,'57,'59, Cu'b
'45 C
'55 Case S
Dad's DB garden tractor
'48 DeSoto
'31 "A Coup
'79 Lincoln TC
God looks out for those of us who don't know how to look out for ourselves!
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Barnyard
- Team Cub
- Posts: 24272
- Joined: Tue Aug 07, 2007 3:39 pm
- Zip Code: 45030
- Tractors Owned: At This Time
40 Farmall Cubs (Round Hood)
2 Farmall Cub (Square Hood)
2 IH Cubs (Square Hood)
5 Lo-Boys (Round Hood)
2 Lo-Boys (Square Hood)
2 Farmall 404's
1 Farmall H
1 Ferguson 20
1 Cub Cadet 125
1 Kubota B-7100 - Circle of Safety: Y
- Location: OH, New Haven (Hamilton County)
- Contact:
Re: engine backfire
Timing may be 180 out or a plug wire crossed.
There are two ways to get enough Cubs. One is to continue to accumulate more and more. The other is to desire less.
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Rick Spivey
- Cub Pro
- Posts: 2779
- Joined: Sun Jul 01, 2007 10:07 pm
- Zip Code: 29518
- Circle of Safety: Y
- Location: SC, Cades 29518
Re: engine backfire
Could be timing, plug wires crossed, or intake valve sticking intermittently.
Rick Spivey
'52 Cub ("Great Personality") 148xxx
'48 Cub with FH ("Gunny Cub") 38xxx
'57 Lambretta (a slow work in progress)
'74 Triumph TR6 (Mama's toy)
'52 Cub ("Great Personality") 148xxx
'48 Cub with FH ("Gunny Cub") 38xxx
'57 Lambretta (a slow work in progress)
'74 Triumph TR6 (Mama's toy)
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SamsFarm
- 501 Club
- Posts: 1853
- Joined: Wed Jan 20, 2021 8:21 pm
- Zip Code: 44410
- Tractors Owned: 1968 Cub Fast Hitch
LF-1 Platform Carrier
144 Cultivators
L-F194 Plow(s)
F38 Disk
L-F3 Spring Tooth Harrow
CS Bell No. 60 Grain Mill on a unmodified Fast Hitch Disk hitch prong
Home Made Fast Hitch Potato Plow
54A Blade
Couple 1948 Cubs
172 Runner Planter
53 Fertilizer
Cub-3 Field Cultivator
Cub-189 Two Way Plow
Cub-22 Sickle Bar Mower
Mechanical Transplanter with side mount barrel (needs a fast hitch adapter) :)
Misc Belly Mowers
Wish List
International 100 Fast Hitch Blade
Mott Fast Hitch Flail Mower
Wish Wish Wish List
Fast Hitch Rotary Hoe
4E hammer mill - Location: Ne Ohio
Re: engine backfire
I had a car a long time ago, did not know it at the time, but, the camshaft got some of the lobes wore off, the result was backfiring through the carb because a few of the exhaust valves were not opening.
Might want to pull your valve cover off and look.
Maybe you have a bent push rod or something.
Might want to pull your valve cover off and look.
Maybe you have a bent push rod or something.
1968 Cub Fast-Hitch
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Dusty B
- 10+ Years
- Posts: 1880
- Joined: Wed May 23, 2007 7:35 am
- Zip Code: 61736
- Tractors Owned: '45 SC Case
- Circle of Safety: Y
- Location: IL, Downs
- Contact:
Re: engine backfire
Barnyard wrote:Timing may be 180 out or a plug wire crossed.
Would it run smoothly for a minute or two or three without backfiring if it were 180° out?
Grandpa's '41 B
'56,,'57,'59, Cu'b
'45 C
'55 Case S
Dad's DB garden tractor
'48 DeSoto
'31 "A Coup
'79 Lincoln TC
God looks out for those of us who don't know how to look out for ourselves!
'56,,'57,'59, Cu'b
'45 C
'55 Case S
Dad's DB garden tractor
'48 DeSoto
'31 "A Coup
'79 Lincoln TC
God looks out for those of us who don't know how to look out for ourselves!
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tst
- 10+ Years
- Posts: 5214
- Joined: Tue Jan 12, 2010 2:08 pm
- Zip Code: 12514
- Circle of Safety: Y
Re: engine backfire
its not 180 out it would not run, check valve adjustment, timing, compression, spark plug and wires
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Eugene
- Team Cub Mentor
- Posts: 20378
- Joined: Fri Jul 02, 2004 9:52 pm
- Zip Code: 65051
- Circle of Safety: Y
- Location: Mo. Linn
Re: engine backfire
And/or sticking valve(s).tst wrote:its not 180 out it would not run, check valve adjustment, timing, compression, spark plug and wires
I have an excuse. CRS.
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SamsFarm
- 501 Club
- Posts: 1853
- Joined: Wed Jan 20, 2021 8:21 pm
- Zip Code: 44410
- Tractors Owned: 1968 Cub Fast Hitch
LF-1 Platform Carrier
144 Cultivators
L-F194 Plow(s)
F38 Disk
L-F3 Spring Tooth Harrow
CS Bell No. 60 Grain Mill on a unmodified Fast Hitch Disk hitch prong
Home Made Fast Hitch Potato Plow
54A Blade
Couple 1948 Cubs
172 Runner Planter
53 Fertilizer
Cub-3 Field Cultivator
Cub-189 Two Way Plow
Cub-22 Sickle Bar Mower
Mechanical Transplanter with side mount barrel (needs a fast hitch adapter) :)
Misc Belly Mowers
Wish List
International 100 Fast Hitch Blade
Mott Fast Hitch Flail Mower
Wish Wish Wish List
Fast Hitch Rotary Hoe
4E hammer mill - Location: Ne Ohio
Re: engine backfire
Give it a break, it is kinda old and might burp and fart a little more than usual! 
1968 Cub Fast-Hitch
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