1949 cub; no spark past distributor

Farmall Cub Forum -- Questions and answers to all of your Cub related issues.

Moderator: Team Cub

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.
sugarbush
Posts: 26
Joined: Sun Mar 31, 2013 4:34 pm
Zip Code: 06488

Re: 1949 cub; no spark past distributor

Postby sugarbush » Thu Apr 04, 2013 6:48 am

Yeah timing is spot on, I am changing out the plug wires because the ones that are on the tractor pull right apart when you try and remove them from the cap or a plug. (you know the cheap crappy ones I am talking about) I also need to put a kit in the Carb and maybe give it a pull as I may not have enough oumph to crank her up at first.

cub47
5+ Years
5+ Years

Re: 1949 cub; no spark past distributor

Postby cub47 » Thu Apr 04, 2013 6:57 am

sugarbush wrote:Yeah timing is spot on, I am changing out the plug wires because the ones that are on the tractor pull right apart when you try and remove them from the cap or a plug. (you know the cheap crappy ones I am talking about) I also need to put a kit in the Carb and maybe give it a pull as I may not have enough oumph to crank her up at first.


Use only solid copper core plug wires on a magneto.

sugarbush
Posts: 26
Joined: Sun Mar 31, 2013 4:34 pm
Zip Code: 06488

Re: 1949 cub; no spark past distributor

Postby sugarbush » Thu Apr 04, 2013 8:38 am

Do you have a source for solid core copper? The sets of wires I have are all stranded.

User avatar
Rudi
Cub Pro
Cub Pro
501 Club
501 Club
Posts: 28707
Joined: Sun Feb 02, 2003 8:37 pm
Zip Code: E1A7J3
eBay ID: ve9rhs
Skype Name: R.H. "Rudi" Saueracker, SSM
Tractors Owned: 1947 Cub "Granny"
1948 Cub "Ellie-Mae"
1968 Cub Lo-Boy
Dad's Putt-Putt
IH 129 CC
McCormick 100 Manure Spreader
McCormick 100-H Manure Spreader
Post Hole Digger
M-H #1 Potato Digger
Circle of Safety: Y
Twitter ID: Rudi Saueracker, SSM
Location: NB Dieppe, Canada

Re: 1949 cub; no spark past distributor

Postby Rudi » Thu Apr 04, 2013 8:41 am

NAPA stocks it. I bought all my spark plug cable supplies in bulk .. box of boots, 90 deg boots and a coil of copper wire. Pretty reasonable, although the wire is pricey.
Confusion breeds Discussion which breeds Knowledge which breeds Confidence which breeds Friendship


Bob McCarty
Team Cub Mentor
Team Cub Mentor
501 Club
501 Club
Posts: 7589
Joined: Tue May 25, 2004 8:02 pm
Zip Code: 80501
Tractors Owned: Cubs, MH Pony, Shaw, Allis G, 1934 Silver King, JD LA and LI, Gibson D, David Bradley Tri-Trac
Circle of Safety: Y
Location: CO, Longmont

Re: 1949 cub; no spark past distributor

Postby Bob McCarty » Thu Apr 04, 2013 9:11 am

TM Tractor sells two varieties also.

Bob
"We don't need to think more,
we need to think differently."
-Albert Einstein

User avatar
Rudi
Cub Pro
Cub Pro
501 Club
501 Club
Posts: 28707
Joined: Sun Feb 02, 2003 8:37 pm
Zip Code: E1A7J3
eBay ID: ve9rhs
Skype Name: R.H. "Rudi" Saueracker, SSM
Tractors Owned: 1947 Cub "Granny"
1948 Cub "Ellie-Mae"
1968 Cub Lo-Boy
Dad's Putt-Putt
IH 129 CC
McCormick 100 Manure Spreader
McCormick 100-H Manure Spreader
Post Hole Digger
M-H #1 Potato Digger
Circle of Safety: Y
Twitter ID: Rudi Saueracker, SSM
Location: NB Dieppe, Canada

Re: 1949 cub; no spark past distributor

Postby Rudi » Thu Apr 04, 2013 11:26 am

Yup, I keep forgetting Tom does:

Image

spark plug wire set braided,

Very reasonable price point as well and already made up

Item description: replacement spark plug wire set braided, new, original style, made in the U.S.A., replaces 407487R1, lacquer covered cotton braid over PVC with copper core, for use with 6 volt or 12 volt electrical systems and J-4 magneto.
.

Image

spark plug wire set

Item description: replacement spark plug wire set, new, for use with 6 volt or 12 volt electrical systems and J-4 magneto, copper conductor, replaces 407487R1
Confusion breeds Discussion which breeds Knowledge which breeds Confidence which breeds Friendship


lombard
5+ Years
5+ Years
Cub Star!
Cub Star!
Posts: 228
Joined: Sat May 03, 2008 3:26 pm

Re: 1949 cub; no spark past distributor

Postby lombard » Thu Apr 04, 2013 4:03 pm

SUGARBUSH----STRANDED IS THE RIGHT WIRE TO USE-------

cub47
5+ Years
5+ Years

Re: 1949 cub; no spark past distributor

Postby cub47 » Thu Apr 04, 2013 5:25 pm

lombard wrote:SUGARBUSH----STRANDED IS THE RIGHT WIRE TO USE-------


That's what TM is selling SB, my terminology of solid copper core is probably off, just as long as you use copper core wires you will be good to go.

sugarbush
Posts: 26
Joined: Sun Mar 31, 2013 4:34 pm
Zip Code: 06488

Re: 1949 cub; no spark past distributor

Postby sugarbush » Thu Apr 04, 2013 6:58 pm

Oh okay... I thought you meant solid copper instead of stranded copper core.

So today I pulled the carb off, boiled it in lemon juice and installed the new kit. I also replaced the plugs with autolites... tomorrow I will put the tank back on, prime the oil pump, and see if she will start.

User avatar
Rudi
Cub Pro
Cub Pro
501 Club
501 Club
Posts: 28707
Joined: Sun Feb 02, 2003 8:37 pm
Zip Code: E1A7J3
eBay ID: ve9rhs
Skype Name: R.H. "Rudi" Saueracker, SSM
Tractors Owned: 1947 Cub "Granny"
1948 Cub "Ellie-Mae"
1968 Cub Lo-Boy
Dad's Putt-Putt
IH 129 CC
McCormick 100 Manure Spreader
McCormick 100-H Manure Spreader
Post Hole Digger
M-H #1 Potato Digger
Circle of Safety: Y
Twitter ID: Rudi Saueracker, SSM
Location: NB Dieppe, Canada

Re: 1949 cub; no spark past distributor

Postby Rudi » Thu Apr 04, 2013 9:47 pm

Copper braid as compared to composite/carbon braid. Solid would be kinda brittle unless it was thick like hard line/coaxial cable. Maybe we should be using solid copper braid as the right term for mags equipped Cubs.
Confusion breeds Discussion which breeds Knowledge which breeds Confidence which breeds Friendship


User avatar
CPIII
5+ Years
5+ Years
501 Club
501 Club
Posts: 669
Joined: Wed Sep 30, 2009 9:43 am
Zip Code: 77355
eBay ID: czechiii
Tractors Owned: 48 Cub SN 54XXX (Captain Crunch)
47 Farmall A (Patches)
Circle of Safety: Y
Location: Magnolia, Texas

Re: 1949 cub; no spark past distributor

Postby CPIII » Fri Apr 05, 2013 7:35 am

Look at this thread.....I had a similar problem with my mag and had the static timing correct but the actual timing of the rotor was out of time.
viewtopic.php?f=1&t=74472
Check toward the bottom of the first page ........the reply from Jim Becker.
Charles Patek III
Some days - Chicken.......Some days - Feathers
Words to live by....

sugarbush
Posts: 26
Joined: Sun Mar 31, 2013 4:34 pm
Zip Code: 06488

aaaahhhhh...

Postby sugarbush » Fri Apr 05, 2013 2:59 pm

Okay so the start up today was a no go. So back to square 1. I decided to actually test the compression so I ran to autozone and got a loan-a-tool compression gauge. Got home and it isn't reading anything on any of the cylinders. If feel compression with my finger over the spark plug holes and I feel it at the intake and exhaust on the manifold. So I thought the gauge was junk so I checked my snowblower and it read it just fine.

So where to start on my assumed compression issue? I don't have an air compressor so cant really pump air in to find where it is leaking out. All the valves are moving and seem to be sealing properly... that leave the rings... I pulled the head and the sleeves look good, not scored at all like stuck rings.

User avatar
64/67lo-boy
5+ Years
5+ Years
Cub Star!!
Cub Star!!
Posts: 343
Joined: Sun Nov 23, 2008 2:46 pm
Zip Code: 23453
Tractors Owned: .
48 cub
67 loboy
52 super c
74 cub 154
50 c
Circle of Safety: Y
Location: Virginia Beach

Re: 1949 cub; no spark past distributor

Postby 64/67lo-boy » Fri Apr 05, 2013 3:46 pm

When doing the compresion check did you do it twice? Onece dry and the second time you do it put about a table spoon of oil in each spark plug hole. This should help seal the rings and not let as much air pass by into your crank case. If still no preasure on the gage then you probubly have valves that an not seating.
Pete from Virginia Beach


man comes into the world cold naked wet and starving, and after that things get worse. "Gun Smoke"

sugarbush
Posts: 26
Joined: Sun Mar 31, 2013 4:34 pm
Zip Code: 06488

Re: 1949 cub; no spark past distributor

Postby sugarbush » Fri Apr 05, 2013 3:58 pm

Yeah I checked it dry and wet and got 0 psi on all 4 both ways. I don't understand why the compression feels good, but not showing on a gauge?

Eugene
Team Cub Mentor
Team Cub Mentor
501 Club
501 Club
Posts: 15050
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: 1949 cub; no spark past distributor

Postby Eugene » Fri Apr 05, 2013 4:02 pm

sugarbush wrote:Yeah I checked it dry and wet and got 0 psi on all 4 both ways.
Valves not sealing.
I have an excuse. CRS.


Return to “Farmall Cub”

Who is online

Users browsing this forum: jpcubs and 3 guests