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Running fine then nothing
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- 10+ Years
- Posts: 27
- Joined: Wed May 31, 2006 4:51 pm
- Zip Code: 47711
- Location: Evansville IN
Running fine then nothing
So yesterday I used my '49 Cub for 3+ hours mowing 3 fields. Started right up like it always does and ran like a champ the entire time! I was just about finished when I got hung up a little in a tight space. While wiggling it out, it died and would not restart. Not even trying to fire. Checked spark ... good ... and tried a few more times without success. I let it sit overnight in case it was flooded, but this morning still nothing. I checked spark at all 4 plugs -- good. Pulled each plug, cleaned and reset gap to .023 (all were already there or just above); put a couple drops of starter fluid in each cylinder. Still nothing. Any suggestions are appreciated! I want to get it back to the shed!!
1948 Cub
- Slim140
- 5+ Years
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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: Running fine then nothing
Did you check the gas tank?
Every home is a school, what are you teaching?
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- Team Cub Mentor
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Re: Running fine then nothing
Fuel level, fuel flow? Since spark appears fine, that's where I would start.
I have an excuse. CRS.
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- 10+ Years
- Posts: 27
- Joined: Wed May 31, 2006 4:51 pm
- Zip Code: 47711
- Location: Evansville IN
Re: Running fine then nothing
Yes. Should have mentioned that it has plenty of fuel. While it seems unlikely (to me at least ), I'll go out to it and check flow.
1948 Cub
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- 10+ Years
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Re: Running fine then nothing
the spark at the plugs should be blue
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- 10+ Years
- Posts: 27
- Joined: Wed May 31, 2006 4:51 pm
- Zip Code: 47711
- Location: Evansville IN
Re: Running fine then nothing
Well, what can I say? It's back in the shed! I checked fuel flow ... it was good. Still wouldn't fire. Decided to put a shot of starting fluid in the choke. That's all it needed -- It fired right off and ran like usual. I'm a bit embarrassed that I didn't do that earlier. So, lesson learned. But, if anyone wants to comment, if gas is flowing to carb, why did it need that help (ie, the starting fluid; I imagine a spray of gas would have done just as well). Is this a hint about maybe a minor problem in the carb?
1948 Cub
- Slim140
- 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: Running fine then nothing
Glad you got it going and back in the shed.
Does it have a magneto or a distributor on it?
Does it have a magneto or a distributor on it?
Every home is a school, what are you teaching?
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- 10+ Years
- Posts: 27
- Joined: Wed May 31, 2006 4:51 pm
- Zip Code: 47711
- Location: Evansville IN
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- Team Cub
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Re: Running fine then nothing
Possibly a small obstruction in the carburetor that was drawn through when the engine briefly fired up on the starting fluid.
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Re: Running fine then nothing
Jim Becker wrote:Possibly a small obstruction in the carburetor that was drawn through when the engine briefly fired up on the starting fluid.
I was thinking the same as Jim. Happened to me, a few times.
Ed
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- 10+ Years
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Re: Running fine then nothing
Do you know how and when to use the choke?
The spray of starting fluid in the intake had the same effect as applying the choke to the carburetor, which is to give the engine a rich fuel mixture to help it start. Sometimes you can crank on a cold engine for hours, and a quick blip of choke will have it running instantly.
The spray of starting fluid in the intake had the same effect as applying the choke to the carburetor, which is to give the engine a rich fuel mixture to help it start. Sometimes you can crank on a cold engine for hours, and a quick blip of choke will have it running instantly.
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- 10+ Years
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- Joined: Wed May 31, 2006 4:51 pm
- Zip Code: 47711
- Location: Evansville IN
Re: Running fine then nothing
Thanks, Matt, the "quick blip" did the trick. Yes, I know how / when to use the choke – –I've had this Cub for 20 years and always choke it when it's cold and never have to when it's hot. Of course yesterday when the tractor quit it was very hot and didn't need choked. This morning I choked it as I always do when it's cold but, as I said, it wouldn't start until I gave it the starter fluid. I wonder if I had done that yesterday when it was hot if it would have started.
Thanks to everyone who chimed in on this. I'm going to go with Jim Becker's theory – small obstruction in the carb. I'm happy my Cub is happy again!
Thanks to everyone who chimed in on this. I'm going to go with Jim Becker's theory – small obstruction in the carb. I'm happy my Cub is happy again!
1948 Cub
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- Cub Pro
- Posts: 7500
- 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: Running fine then nothing
Matt Kirsch wrote:Do you know how and when to use the choke?
The spray of starting fluid in the intake had the same effect as applying the choke to the carburetor, which is to give the engine a rich fuel mixture to help it start. Sometimes you can crank on a cold engine for hours, and a quick blip of choke will have it running instantly.
Matt, it is not the same as applying the choke. Choking enriches the fuel, by reducing the air intake. Spraying fuel into the air intake, bypasses the carb, by sending air and fuel, into the engine. If it runs on the spray, then stalls, there's a fuel supply issue, with the carb.
Ed
- Slim140
- 5+ Years
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- Joined: Wed Nov 22, 2017 6:24 am
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- 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: Running fine then nothing
Matt Kirsch wrote:Do you know how and when to use the choke?
The spray of starting fluid in the intake had the same effect as applying the choke to the carburetor, which is to give the engine a rich fuel mixture to help it start. Sometimes you can crank on a cold engine for hours, and a quick blip of choke will have it running instantly.
Starting fluid is different than gas because it has a lower ignition temperature & it's a completely different mixture than gas, it's not the same as a quick blip of the choke.
Every home is a school, what are you teaching?
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- 10+ Years
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- Joined: Tue Jun 08, 2004 3:04 pm
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- Location: Rochester, NY
Re: Running fine then nothing
Yes, I understand that starting fluid is not gasoline, but it is FUEL.
Both choking and spraying starting fluid enrich the air/fuel mixture entering the engine.
Both choking and spraying starting fluid enrich the air/fuel mixture entering the engine.
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