Changed ignition

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jsfarmall
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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)

Changed ignition

Postby jsfarmall » Mon Jul 30, 2018 8:35 am

Reverted ole rusty back to magneto this weekend. Did have 12v coil on it. Is hand crank start with no charging system at all. No plans to change that either. Was a pain swapping the battery. Starts and runs runs even better now. But still don't like to start when hot with new points and condenser. Symptom of low compression?
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

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Shane N.
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1975 International Cub
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)
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Re: Changed ignition

Postby Shane N. » Mon Jul 30, 2018 8:56 am

Shouldn't matter when hot or cold starting, try putting a timing light on it. Doesn't take much to get it perfect and doesn't take much to be off enough to start harder when hot.
Every home is a school, what are you teaching?

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jsfarmall
501 Club
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Posts: 596
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: Changed ignition

Postby jsfarmall » Mon Jul 30, 2018 12:35 pm

Thank ya will do. With the light on it, the notch on the pulley should be right with pointer right?
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

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John *.?-!.* cub owner
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Re: Changed ignition

Postby John *.?-!.* cub owner » Mon Jul 30, 2018 12:38 pm

Timing light does not do a whole lot with a magneto, as long as you static time it properly. Not starting hot is usually a condenser or coil. After that or before, check for a leak in the manifold to engine or carb to manifold gaskets.
If you are not part of the solution,
you are part of the problem!!!

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John *.?-!.* cub owner
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Posts: 23245
Joined: Sun Feb 02, 2003 2:09 pm
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
Location: Mo, Potosi

Re: Changed ignition

Postby John *.?-!.* cub owner » Mon Jul 30, 2018 12:42 pm

jsfarmall wrote:Thank ya will do. With the light on it, the notch on the pulley should be right with pointer right?
The only time the notch will be right at the pointer, is when it is cranking and the impulse is snapping. Once it starts the magneto should go to 13 degrees advance. No in between, a magneto does not advance gradually like a distributor.
If you are not part of the solution,
you are part of the problem!!!

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Shane N.
501 Club
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Posts: 4155
Joined: Wed Nov 22, 2017 6:24 am
Zip Code: 00000
Tractors Owned: .
1975 International Cub
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: Changed ignition

Postby Shane N. » Mon Jul 30, 2018 1:14 pm

John *.?-!.* cub owner wrote:Timing light does not do a whole lot with a magneto, as long as you static time it properly. Not starting hot is usually a condenser or coil. After that or before, check for a leak in the manifold to engine or carb to manifold gaskets.

John, what you say makes perfect since. I had a Cub once that after it got warm was a bear to start, moved the timing a little bit and it made all the difference starting and ran better too. I know what I did to mine has nothing to do with this :lol:
Every home is a school, what are you teaching?

Circle of Safety

jsfarmall
501 Club
501 Club
Posts: 596
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: Changed ignition

Postby jsfarmall » Mon Jul 30, 2018 3:10 pm

I static timed mine where it fires right up cold. I have the distributor advanced almost to the max adjustment.
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

k hutchins
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Tractors Owned: 1948 Farmall Cub
193 plow
1948 snow/grading blade
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Cub 144 cultivator
Cub 22 mower
Cub 172 one row planter
Original manuals for all the above

Re: Changed ignition

Postby k hutchins » Wed Aug 01, 2018 5:46 am

What l found over the years is that mine starts better "hot" if the throttle is advanced above half way. I'm not a mechanic and l don't know why this is true, but when the manifold is hot it vaporizes the gas more, so the setting between the carb and govenor needs to be advanced. In my humble opinion, that's why advancing the throttle works when it's hot.
Why is there never enough time to do the job right, but always enough time to do it over. :?:

jsfarmall
501 Club
501 Club
Posts: 596
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: Changed ignition

Postby jsfarmall » Wed Aug 01, 2018 5:50 am

Will definitely try that next time around. Usually I have to pretty much flood the engine. Choke it to death before it will ever start hot. But throttle is usually a notch or 2 above idle.
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
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
Posts: 23245
Joined: Sun Feb 02, 2003 2:09 pm
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
Location: Mo, Potosi

Re: Changed ignition

Postby John *.?-!.* cub owner » Wed Aug 01, 2018 9:35 am

Having to choke it to the point of flooding is another indication of a weak coil. Learned that from experience.
If you are not part of the solution,
you are part of the problem!!!

jsfarmall
501 Club
501 Club
Posts: 596
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: Changed ignition

Postby jsfarmall » Wed Aug 01, 2018 9:41 pm

Well it used to be battery coil type ignition with a brand new coil. I even tried 3 other coils from 3 running tractors. Then swapped to this magneto with new points and condenser and exact same problem. So 4 battery coils and 1 mag coil.......
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


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