'48 Cub starter issue

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Don B.
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'48 Cub starter issue

Postby Don B. » Sat Apr 01, 2023 3:54 pm

My '48 Cub starter is acting like it's not strong enough to turn the engine. I've never had trouble with starting this Cub. Starts easy with the crank and runs great. It has about 43 hours on it since the prior owner did an engine refresh. I swapped starters with my '51 with same result. Just a grunt then nothing. I have a newly rebuilt spare starter from Ethan Lublow - same result. Removed starter switch and just touched wire to the post - same result. Checked voltage at starter and its good. I can't seem to think of what's wrong.
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Re: '48 Cub starter issue

Postby Bob McCarty » Sat Apr 01, 2023 4:01 pm

Did you double check the battery connections and battery quality?
"We don't need to think more,
we need to think differently."
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Don B.
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Re: '48 Cub starter issue

Postby Don B. » Sat Apr 01, 2023 4:12 pm

Battery is good with good voltage at the starter.
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Don McCombs
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Re: '48 Cub starter issue

Postby Don McCombs » Sat Apr 01, 2023 5:03 pm

Make sure ground is good between starter and engine block.
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Eugene
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Re: '48 Cub starter issue

Postby Eugene » Sat Apr 01, 2023 5:18 pm

Don B. wrote:Battery is good with good voltage at the starter.
Maybe. Voltage doesn't necessarly indicate battery, or connection, or battery cable condition.
Bob McCarty wrote:Did you double check the battery connections and battery quality?
Conduct voltage drop tests.
I have an excuse. CRS.

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tmays
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Re: '48 Cub starter issue

Postby tmays » Sat Apr 01, 2023 5:47 pm

Agree with Eugene
Thomas

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Don B.
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Re: '48 Cub starter issue

Postby Don B. » Sat Apr 01, 2023 5:51 pm

Yes. I did the voltage drop test. Battery cable is an almost new store bought.
This circuit isn't complicated. It does have to be one of these things.
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Re: '48 Cub starter issue

Postby tst » Sat Apr 01, 2023 5:57 pm

check ignition timing

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Don B.
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Re: '48 Cub starter issue

Postby Don B. » Sat Apr 01, 2023 6:00 pm

Tim, but it starts and runs so well with a quick hand crank.
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Barnyard
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Re: '48 Cub starter issue

Postby Barnyard » Sat Apr 01, 2023 6:03 pm

Hmmm, sounds like a project at the Barnyard Bash! :D
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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Re: '48 Cub starter issue

Postby Eugene » Sat Apr 01, 2023 7:06 pm

Don B. wrote:Yes. I did the voltage drop test. Battery cable is an almost new store bought.
This circuit isn't complicated. It does have to be one of these things.
At the battery terminals while cranking the engine with the starter?
I have an excuse. CRS.

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Glen
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Re: '48 Cub starter issue

Postby Glen » Sat Apr 01, 2023 7:14 pm

You didn't say if the Cub is 6 or 12 volts.
The 6 volt battery cables need to be a bigger size than 12 volt cables.
Battery cables from an auto parts store are probably for a 12 volt system.

The 6 volt cable from the battery to the starter that TM Tractor sells is number 2 cable, their listing says.
That is the size Case IH sold in the past, I haven't bought one there lately.
Below is TM Tractor's listing, you can look at the pics.
http://www.tmtractor.com/new/el/2581fp.htm
Last edited by Glen on Sun Apr 02, 2023 1:30 am, edited 1 time in total.

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Don B.
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1951 Cub (does the work)
1952 Cub (sold)
Circle of Safety: Y
Location: Charleston, WV

Re: '48 Cub starter issue

Postby Don B. » Sat Apr 01, 2023 7:26 pm

Eugene, I suppose that would detect a battery problem?
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Don B.
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1951 Cub (does the work)
1952 Cub (sold)
Circle of Safety: Y
Location: Charleston, WV

Re: '48 Cub starter issue

Postby Don B. » Sat Apr 01, 2023 8:00 pm

Tractor is 6 volt.
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Eugene
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Re: '48 Cub starter issue

Postby Eugene » Sat Apr 01, 2023 8:29 pm

Don B. wrote:Eugene, I suppose that would detect a battery problem?
Yup. Works on 6 volt batteries. Cheap load testing for battery condition. Saves driving to the auto parts store and having the battery tested.
I have an excuse. CRS.


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