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More mag issues

L

Lanse

Well-known Member
Well, i turned it right side up and it still doesnt work right. It snaps, just doesnt fire. What should i look at firse??? For those w. duialup, it is an IH H4 mag.
Lanse/Chucks Youtube channel. Lots more

Mag II
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Is the rotor lined up with the tower when it fires thats the most common problem. When you turn the drive right and it stops at the impulse the rotor must line up with the tower where the plug wire goes. There are four positions where the impulse will snap making the fire go to the plug wire. Just put a plug wire in and a spark plug on the other end making sure the plug is grounded to the mag. My vice is fastened to the metal top of the workbench and i just put a clamp to fasten down the plug that way im sure of ground.
 
lanse, some things to check, are the points clean and dry, rub a dollar bill thru them to remove any oil film. gapped right? i don't have specs but would guess .020 on high point of cam lobe, is it shorted at the kill wire terminal? could be insulator where it goes thru mag housing. good luck and keep trying you can do it. leroy
 
Lanse, you need a coil wire from the top cap to the bottom with the 4 terminals on it to have spark at the plugs. Install your spark plug wire in the top terminal and then turn the mag and check for spark.
 
I watched a few seconds of your video, Lanse, I spotted the trouble right away! You need to have a short plug wire from the single terminal on the top cap to the center terminal on the cap with the 5 terminals. If you hook your plug wire directly to the top terminal (this is the coil terminal) you will get a spark. The voltage goes through that external wire from the coil to the center of the distributer cap, where it is then distributed to the 4 terminals and on to the spark plugs.
 
Awesome!! I knew itd be something simple like that, especially since you rebuilt it. Thanks!!
 
I WILL CAUTION YOU AGAIN

DO NOT HOLD A MAG. IN A VISE LIKE THAT !!

Squeezing them on the sides is a NO NO as it can make the rotor rub the fields. Alum is soft and the clearance insides is close.
 
Ya been scolded allready. Its not clamped in there, its just kind of sitting there with a rag wrapped around it. Theres no pressure on the mag
 
Mike,
Lanse enjoys learning the hard way, read over some of his previous posts and the advice given and NOT taken.
 
Oh ya. Right. Off the top of my head:

ranger-Dont buy it
Ranger-make a trailer out of it
Ranger-Dont paint it

B-Dont put it in vise
B-Dont buy it
B-Use new pistons/sleeves
B-Take that to a local garage
B-See what you've done?
B-head-take it down before it kills someone
B-Dont paint it yet

C-dont do it-you need that money for vacation (Bill)
C-Get a new block
C-Grind the crank
C-Keep the distributor
C-Get a new tire
C-Dont grind that off
C-Dont use a file-spend $4 on an ez-out
C-Use a torch
C-Dont use the other head
C-Dont reuse that gasket
C-Dont grind down the front end
C-Do something about them studs
C-Dont part it out yet

WC-Dont get it
WC-Be ready for what this is gonna cost
WC-Dont pull it
WC-Leave it intact
WC-Careful that might bend
WC-Careful that might break
WC-Careful that might fall
WC-Go easy on that
WC-Dont reuse those sleeves (i did eventually follow that advice)


I can think of more. I've learned its generally good advice to follow the advice i get here, and i do most of the time. Thanks everyone
 
Lanse,
Hang in there your getting close to one project being buttoned up. Try to remember your goofs and not repeat them and the next job always goes easier. Enjoyed your progress from: I know enough to get into trouble to now asking BEFORE you're in trouble.
 
Lanse,

Nebraska kirk has it correct. The tower on the top is the coil. The center tower on the distributor cap is where the short coil wire would go. Last the four towers like you have the wire and plug is what goes to the four spark plugs.

First take the wire and spark plug and hook it directly and snap over the mag. Hooked like this the plug should fire on every snap of the mag. If it fires then the mag and coil are ok.

Then hook up the short coil wire from the coil to the center distcap tower and hook the plugwire and plug like you already show and it should fire every fourth snap of the mag just like it would on the engine.
 
Lanse, you are NOT testing it correctly, your wire is plugged into the cap terminal with no coil wire. In order to get a spark from the cap terminals, you NEED a wire going from the coil cap into the cap terminal in the center of the cap, without that wire, there is no power entering the cap. You definily need that wire. You also have the plug grounded on your vise with the mag wrapped in cloth, there is no ground connection from the mag to the vise. Email me if you need help. Good luck!
 
My friends Ranger got 23mpg while my F150 4wd gets 19 mpg on tests.The Ranger was a stinker to work on, had no cab room and could not get moving in low gear with 6 50 lb hay bales on board.The pedals are so small and close together you hit the gas when you stepped on the brakes.The rear spring hangers rusted away on the ranger in 60000 miles.I haul many loads in my F150 that the Ranger cant handle.A F150 can be bought for the same money used as a Ranger.I find that most people who ask for advice have already made up their minds to do the wrong thing.Lanse is pretty good at doing just that.
 
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