Mon Oct 22, 2012 8:46 am
Mon Oct 22, 2012 9:07 am
Mon Oct 22, 2012 10:24 am
lazyuniondriver wrote:No it must be hooked up polarity correct.
In the case of a positive ground tractor. The minus sign is connected to the breaker points in the distributor and the plus sign is energized by the ignition switch.
Mon Oct 22, 2012 10:40 am
Dave50cub wrote:1950 Cub, battery ignition, 6 volt, positive ground.
Does it matter which terminal ( + or - ) on the ignition coil is wired to the distributor? Will it run no matter which way it is wired?
Mon Oct 22, 2012 11:47 am
Boss Hog wrote:the wire from the switch should go to the neg. side of the coil on a 6 volt pos. ground, and the pos. side to the dist.
Mon Oct 22, 2012 11:51 am
Mon Oct 22, 2012 12:21 pm
lazyuniondriver wrote:A coil is marked for polarity so I have never hooked one up in reverse polarity so I can't tell you if one will work properly hooked up in reverse polarity.
Mon Oct 22, 2012 1:01 pm
Mon Oct 22, 2012 3:23 pm
Mon Oct 22, 2012 4:41 pm
A simple check for correct coil polarity.Ignition coils are connected so that the high tension current will have a negative polarity, regardless of battery polarity.
For low rpm, limited number of cylinder engines, coil polarity isn't going to make a difference. A polarity problem is more likely to show up on 6 or 8 cylinder engines at high rpms due to lowered current draw at the coil (related to the number of sparks per second) and cylinder compression.Ordinary lead pencil. Engine at idle speed, insert the pencil point in the gap between the end of the ignition cable and the spark plug terminal, If the flare appears on the plug side of the pencil point, the polarity is correct, negative.
Mon Oct 22, 2012 5:40 pm
Eugene wrote:My reference: Automotive Diagnosis and Tune-up, Wetzel, 1969. In case you are bored, the text book has 4 pages explaining coil construction and theory.
Mon Oct 22, 2012 7:03 pm
No digging necessary, the book was laying on the floor next to the desk along with a stack of other frequently used references. Less used references are maintained in three book shelves full of assorted books on mechanics, construction, building codes, history, government and any thing else that interested me from time to time.lazyuniondriver wrote:I surely appreciate you taking the time to dig this reference up to satisfy my curiosity.
Tue Oct 23, 2012 7:13 am