coil testing

[alfred e numan]

Here is how to test the ignition coil on the engines we use. Disconnect the kill switch wire where it connects to the ignition coil. Connect 1 ohm meter lead to the disconnected terminal on the coil. Connect the other Ohm meter wire to the coils metal base - the meter should say .5 to 1 ohm. next- remove the probes wires, pull the spark plug cap, connect 1 probe wire to the coil wire, the 2nd probe wire to the coils metal base. The meter should show approx 6000 ohms resistance. These measurements will give you a rough idea of the electrical condition of the coils primary and secondary windings- and the condition of the plug wire and cap. There is a saying- its volts that jolts- its current that kills- so be careful around electricty.

 

[GTS 666]

Sweet thanks heaps for that info I've got a few that a want to test.

 

[alfred e numan]

coil test

keep in mind also that the coil wire-cap will add resistance to the secondary coil windings readings, i have no idea at all what kind of coil wire these engines use- a solid wire core or a carbon- fiberglass construction? My coil on a HY engine seems to have a yellow spark- I have been told that a fat blue spark is stronger, higher voltage. Makes the spark plugs less prone to fouling. Any other opinions out there?

 

[Deluge1]

Cool. I've always used a spark tester or a spark plug to check the coil.

 

[GTS 666]

MSD ignition leads are they worth using I've got one but haven't installed it.

 

[alfred e numan]

msd wire

yea good idea 666, When i overhauled the ford van i bought 6 or 8 mm msd wires, the kit came with two coil leads- 90 degrees off the coil cap wire, they should be in a box in the van- 12,000 miles on the thing then gas hit three fifty a gallon- i oiled the engine up and parked it, its a storage van under the carport now, $t !!.