Lost.

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Lilduke88
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Zip Code: 08088
Tractors Owned: 57 cub lo boy

Re: Lost.

Postby Lilduke88 » Thu Apr 23, 2020 6:00 pm

It ran really good until my move from San Diego last year. It ran ok here that it what made me do the rings. It ended them for a while

Lilduke88
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Tractors Owned: 57 cub lo boy

Re: Lost.

Postby Lilduke88 » Thu Apr 23, 2020 6:04 pm

I cleaned the top of the head and block along with cleaning up around the valves, should I re check the valve clearance. It should still run even if they are off a little? Or am I wrong on this.

DonMountain
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Re: Lost.

Postby DonMountain » Sat Apr 25, 2020 10:45 am

Could you be 360 degrees out on timing? As mentioned earlier are you at TDC on the compression stroke? Or TDC on the exhaust stroke? And did you remember to put the felt washer back under the rotor so the conductor of the rotor is high enough to contact (or close to) the distributor cap contacts? I made that mistake once during a tune up. It would start and run a little intermittently and then not at all when warmed up.
1959 International Cub Lo-Boy W/Fast hitch, 59 Woods, dozer blade, plow
1954 Farmall Super C W/Fast hitch, belly dozer blade
1950 Farmall M

Larry in WNY
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Re: Lost.

Postby Larry in WNY » Sat Apr 25, 2020 4:05 pm

I would pull the plugs, clean them and leave them attached to the wires and place them near each plug hole. Rotate the engine by hand or with a hand crank and verify it's firing 1-4-3-2 on each compression stroke. Plug closest to the radiator is #1. Each plug will spark as it reaches the timing mark on the front pulley. Leave the gas off or it will light up. If that is all good it just may need some help starting after replacing the rings. Oil will help as said already to increase compression. Pull starting may be the best option. I've been there too. Most times it's something simple. Good luck.

Larry in WNY
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Re: Lost.

Postby Larry in WNY » Sat Apr 25, 2020 4:13 pm

One other thing, if they sit awhile the valves can stick. Take the tappet cover off behind the carb and watch the valves move up and down as the engine rotates. If any or not moving use penetrating oil and lightly tap them with a wood dowel or some other soft tool. I use STP oil treatment to keep valves lubed.

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Glen
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Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Lost.

Postby Glen » Sat Apr 25, 2020 4:25 pm

Hi,
The firing order for a Cub engine is 1 3 4 2, going clockwise around the distributor cap.

Below is a page from the 1957 Cub LoBoy operator's manual, showing the firing order, in the upper left pic. It also shows the points and setting the gap, in the right pic. :)

http://farmallcub.com/rudi_cub/www.clea ... e%2042.jpg

Lilduke88
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Joined: Sat Aug 20, 2016 4:43 pm
Zip Code: 08088
Tractors Owned: 57 cub lo boy

Re: Lost.

Postby Lilduke88 » Sat Apr 25, 2020 8:47 pm

It ya to be something not lining up right in the ignition. Now I have spark at the points but not going to the wires. I think I am going to put everything back on it like it was when it last ran and see if it runs. If not I’ll Change one thing at a time until I figure out what the deal is. I know I have the timing correct. I used the method of looking at the number 4 valves. The firing order is correct and I have good fuel flow.

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Steve Butram
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Re: Lost.

Postby Steve Butram » Sun Apr 26, 2020 9:21 am

The fact you have wet plugs indicates to me that there may be a stuck valve or two.

If the hood is off crank the engine with the spark plugs out look thru the spark plug hole so see if the valves are opening and closing.

It may be also be possible the rings haven't seated to attain the compression needed to run. My suggestion would be to pull it to get the engine spinning fast enough to get it the rings to seat.
Be prepared to be unprepared Seth Goden

Lilduke88
5+ Years
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Posts: 43
Joined: Sat Aug 20, 2016 4:43 pm
Zip Code: 08088
Tractors Owned: 57 cub lo boy

Re: Lost.

Postby Lilduke88 » Thu Apr 30, 2020 3:09 pm

Ok got it running after some more messing with it, it ran for about 20 minutes and my kids started to get needy so I turned it off. Went to start it again and not it just turns over and will not start. It sounded good and ran smooth.

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Glen
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Joined: Mon Mar 19, 2012 7:33 pm
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Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Lost.

Postby Glen » Thu Apr 30, 2020 5:00 pm

Hi,
I'm not sure if you meant you tried to start it again when it was warm, or it sat for some time and was cold.
Check and see if there is a good blue spark at the spark plugs. If there is none, or a weak yellow spark, the coil may have quit, or is weak.
The original coils on Cub commonly quit. Some don't work right when they are warm or hot, and the engine stops until the coil cools off again.

The page below shows the style of coil IH used for years, with a Battery Ignition unit, it has wires at both ends.

http://farmallcub.com/rudi_cub/www.clea ... age-11.jpg

If you have one of those and it has quit, IH replaced it with a modern coil like cars used.
It takes a different bracket, the modern coil is a larger diameter than the old coil.

Below are listings at TM Tractor for a new coil and bracket. You can look at the pics.
The listing is a 6 volt coil, they have a 12 volt coil too. :)

http://www.tmtractor.com/new/el/788fp.htm

http://www.tmtractor.com/new/el/693fp.htm

Lilduke88
5+ Years
5+ Years
Posts: 43
Joined: Sat Aug 20, 2016 4:43 pm
Zip Code: 08088
Tractors Owned: 57 cub lo boy

Re: Lost.

Postby Lilduke88 » Thu Apr 30, 2020 5:21 pm

I had the new type coil and I just replaced it at the ring job. I went out after it cooled down and tried it and it started but not as fast as it did the first time. All I have is a regular 12volt timing light so I’ll try and use a 12 volt battery and time the tractor. I just sounds so good running it will surprise me if the timing is that off.

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Glen
5+ Years
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Posts: 5072
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: Lost.

Postby Glen » Thu Apr 30, 2020 5:45 pm

Hi,
New electrical parts can be defective. I would check and see if there is a good blue spark, especially at the time when it won't run. :)

Lilduke88
5+ Years
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Posts: 43
Joined: Sat Aug 20, 2016 4:43 pm
Zip Code: 08088
Tractors Owned: 57 cub lo boy

Re: Lost.

Postby Lilduke88 » Thu Apr 30, 2020 5:58 pm

Ok thanks. I’ll do that. Would the coil be hot to the touch. If so it was not hot when I put my hand on it.

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Glen
5+ Years
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Posts: 5072
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: Lost.

Postby Glen » Thu Apr 30, 2020 6:18 pm

Hi,
I'm not sure if they all do the same thing. I think I have read on here that some of them do get hot when they quit.
But some might not get hot.

Lilduke88
5+ Years
5+ Years
Posts: 43
Joined: Sat Aug 20, 2016 4:43 pm
Zip Code: 08088
Tractors Owned: 57 cub lo boy

Re: Lost.

Postby Lilduke88 » Thu Apr 30, 2020 6:23 pm

Ok. Thanks again.


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