What all do I need to crank start?

The Cub Club -- Questions and answers to all of your Cub related issues.
Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
Alex M
Posts: 5
Joined: Fri Jul 23, 2021 2:53 pm
Zip Code: 36862

What all do I need to crank start?

Postby Alex M » Tue Jul 27, 2021 5:51 pm

I'm working on my grandads 1950 that hasn't run in about 30 years and I dont want to spend all the money on a 12 volt system if I don't have to. If I plan to crank start it, what all in the electrical system has to work? Please bare with me I'm new to this stuff.

User avatar
Peter Person
Cub Pro
Cub Pro
Posts: 4581
Joined: Fri Nov 18, 2005 4:27 pm
Zip Code: 06076
Circle of Safety: Y
Location: CT, Stafford Springs

Re: What all do I need to crank start?

Postby Peter Person » Tue Jul 27, 2021 6:28 pm

Alex,
You need to re-read some of the responses in the other topic you posted.
Glen,Waif, and Eugene pointed you to important items to consider.
To answer your specific question, do you have a magneto or battery ignition?
1957 Farmall Cub "Emory", Fast-Hitch, L-F194 Plow & Colter, L-38 Disc Harrow, Cub-54A Blade, Cub-22 Sickle Bar Mower, IH 100 Blade

Image

Circle of Safety

Alex M
Posts: 5
Joined: Fri Jul 23, 2021 2:53 pm
Zip Code: 36862

Re: What all do I need to crank start?

Postby Alex M » Tue Jul 27, 2021 6:35 pm

Peter Person wrote:Alex,
You need to re-read some of the responses in the other topic you posted.
Glen,Waif, and Eugene pointed you to important items to consider.
To answer your specific question, do you have a magneto or battery ignition?


I have read them and will again, I'm just thinking ahead for what I am going to need. I'm pretty sure I've got a magneto.

User avatar
Glen
10+ Years
10+ Years
Posts: 6221
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: What all do I need to crank start?

Postby Glen » Tue Jul 27, 2021 7:34 pm

Hi,
If you are hand cranking the Cub, all it needs is a magneto that works well.
The magneto makes it's own power, and is not connected to battery power.

It is supposed to make a good blue spark so the engine will start well, and run well.
You could test it's spark, the spark in the spark plug wires should be blue and jump a 1/4" gap.
A yellow spark is weak and needs improving, the engine may not run with a yellow spark.

The ignition points get old and burned from use, and can make the spark less than it should be.
A bad condenser can cause a poor spark.
The magneto coil can go bad, and not work right.

TM Tractor has magneto parts, you can look at the pics of them.

The Battery Ignition unit needs a battery to make the coil work.
It doesn't make it's own power. :)

Eugene
Team Cub Mentor
Team Cub Mentor
Posts: 20468
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: What all do I need to crank start?

Postby Eugene » Tue Jul 27, 2021 7:55 pm

Don't get ahead of yourself. Is the engine stuck? Can you hand crank the engine?

COMPRESSION. Need compression on all cylinders. Dry compression test then wet test - record the results. Hand cranking the engine, you need a minimum of 50 psi on all cylinders.

Work order. Establish compression, then carburation, lastly ignition.

Do not purchase any parts until you know what the problem is and how to solve it.
I have an excuse. CRS.

SamsFarm
501 Club
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: What all do I need to crank start?

Postby SamsFarm » Wed Jul 28, 2021 11:09 pm

Most important, you'll need the hand crank! And a safe technic to use it!

Magneto will work without a battery.

A regular distributer & coil will need some voltage from some sort of power source, (battery, battery charger, jumper cables).

k hutchins
10+ Years
10+ Years
Posts: 692
Joined: Tue Mar 27, 2012 5:48 pm
Zip Code: 48843
Tractors Owned: 1948 Farmall Cub
193 plow
1948 snow/grading blade
Woods 59 C3
Cub 144 cultivator
Cub 22 mower
Cub 172 one row planter
Original manuals for all the above
Circle of Safety: Y

Re: What all do I need to crank start?

Postby k hutchins » Thu Jul 29, 2021 6:21 am

IMHO
Points, plugs, and condensor are fairly inexpensive and easy enough to start with. You can even dress (file) the existing points, and adjust the gap. Then clean and regap the plugs.
Of course fuel and compression are important as well, but if you're just checking the mag to see if it's servicable, this is where l would start. Cleaning the inside of the cap and checking the rotor for timing marks will also help.
Also, don't for get to prime the oil pump. Then review "How to" threads on handcranking. Keep your thumb on the back side, 1 revolution at a time with a sharp upward stroke.
Assuming you have "decent" compression and fuel flow, you should be able to get it to "cough" a couple times even if it doesn't start. This can point you in the directions you need to pay attention to for start up.

Good luck
Hutch
Why is there never enough time to do the job right, but always enough time to do it over. :?:

User avatar
Rick Spivey
Cub Pro
Cub Pro
Posts: 2779
Joined: Sun Jul 01, 2007 10:07 pm
Zip Code: 29518
Circle of Safety: Y
Location: SC, Cades 29518

Re: What all do I need to crank start?

Postby Rick Spivey » Thu Jul 29, 2021 7:08 am

Don't snap the magneto over without giving the spark a place to go, that can burn out the coil. I would disconnect the coil wire (goes from square cap to distributor tower), and check for spark against a grounded surface like the engine block. Of course, that requires two people when hand cranking. If you get a blue to white spark there, then proceed to check spark at each plug. If you don't then the magneto needs some service. Set the engine to TDC on cylinder 1, remove the magneto, and start asking questions. Magnetos are a bit mysterious to most folks, and a special tool is needed to take them completely apart (if needed).
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)

Clemsonfor
501 Club
501 Club
Posts: 1127
Joined: Sun Nov 10, 2019 5:14 pm
Zip Code: 29848
Tractors Owned: Yanmar YM2000
Yanmar YM186 (non running)
1952 Farmall Cub
Circle of Safety: Y
Location: Greenwood County SC

Re: What all do I need to crank start?

Postby Clemsonfor » Thu Jul 29, 2021 7:44 pm

Alex M wrote:I'm working on my grandads 1950 that hasn't run in about 30 years and I dont want to spend all the money on a 12 volt system if I don't have to. If I plan to crank start it, what all in the electrical system has to work? Please bare with me I'm new to this stuff.

If it's a 6v , there is no reason to convert it if your stuff works as is. But really to answer your question you just need a crank. Turn the switch on, set the throttle and maybe choke, maybe not? And MAKE SURE ITS NOT IN GEAR!!!! Then just crank it swiftly good a few times.

I should also say that you need a battery withatleast some voltage in it of it's a battery ignition. But I read you have a magneto in a later post so ignore this.

User avatar
Stanton
Cub Pro
Cub Pro
Posts: 7760
Joined: Mon Jun 22, 2009 6:56 am
Zip Code: 64070
Tractors Owned: 1942 Farmall AV, serial #87025
1947 Farmall Circle Cub, serial #2116
1948 Farmall Cub, serial #46066
Circle of Safety: Y
Location: Lone Jack, MO

Re: What all do I need to crank start?

Postby Stanton » Fri Jul 30, 2021 6:31 am

Here's the proper way to hand crank/start a Cub. Found in our Video library: How to Hand Start a Cub
Stanton
Image Circle of Safety

User avatar
SONNY
10+ Years
10+ Years
Posts: 4192
Joined: Thu Nov 09, 2006 11:26 pm
Zip Code: 61722

Re: What all do I need to crank start?

Postby SONNY » Fri Jul 30, 2021 11:25 am

A crank and if you value your hands and arms---- you wont do it !! --- pull start that sucker! and be safe! Good luck on your venture!

User avatar
Urbish
10+ Years
10+ Years
Posts: 2431
Joined: Sat Sep 07, 2013 3:45 pm
Zip Code: 48158
Tractors Owned: ~
1958 International Cub LoBoy
1947 Farmall H
1946 Farmall B
1953 Willys CJ3B
2022 Massey Ferguson GC1723E Subcompact

Cub Loboy L-54 Leveling and Grader Blade
Circle of Safety: Y
Location: Manchester, MI

Re: What all do I need to crank start?

Postby Urbish » Fri Jul 30, 2021 2:30 pm

If you get her dialed in, crank starting should be as easy as this:

Jim

Circle of Safety

Completeihnut
Posts: 3
Joined: Thu Jul 29, 2021 2:10 pm
Zip Code: 75002

Re: What all do I need to crank start?

Postby Completeihnut » Fri Jul 30, 2021 4:03 pm

Thanks for all the information. Let me recap... Good compression,,, Drained fuel, cleaned fuel line and bowl (screen and openings clogged.. soaked carb in cleaner and rebuilt.. getting fuel but no spark.. IT DOES HAVE A MAG - H-4. With help from Jim Becker got to points which look good. Want to replace and do condenser while I'm there but cannot get it out..

Have removed the cover, the bake lite insulator but there is an inside insulator that I'm cannot tell whether it should go in the hole or come out. Also the coil wire is connected to it. what is the best way to disconnect that.

Lot of questions but rather get info before ruining something that I can no longer get parts for.


Thanks in advance

Warren

User avatar
Don McCombs
Team Cub Mentor
Team Cub Mentor
Posts: 17605
Joined: Mon Feb 03, 2003 6:45 am
Zip Code: 21550
Tractors Owned: "1950 Something" Farmall Cub
1957 Farmall Cub w/FH
1977 International Cub w/FH
1978 International Cub
1948 Farmall Super A
Circle of Safety: Y
Location: MD, Deep Creek Lake

Re: What all do I need to crank start?

Postby Don McCombs » Fri Jul 30, 2021 4:20 pm

What model tractor are we discussing now?
Don McCombs
MD, Deep Creek Lake

Image
Proud Member of Maryland Chapter 39

The best teachers are those who show you where to look, but don't tell you what to see.
A. K. Trenfor

User avatar
Glen
10+ Years
10+ Years
Posts: 6221
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: What all do I need to crank start?

Postby Glen » Fri Jul 30, 2021 5:40 pm

Hi,
You probably know a Cub uses a J 4 magneto, which is different than a H 4 magneto. :)


  • Similar Topics
    Replies
    Views
    Last post

Return to “Farmall Cub”

Who is online

Users browsing this forum: Jim Becker and 3 guests