Ignition problems and Napa part # for ignition rotor

Discuss fixes, upgrades and modifications to your M37

Moderators: Cal_Gary, T. Highway, Monkey Man, robi

Post Reply
MikeL
Posts: 4
Joined: Mon Jun 20, 2016 9:17 am

Ignition problems and Napa part # for ignition rotor

Post by MikeL »

Finally attempted to start my truck after sitting 8 years and found I had no spark. Pulled the distributor. The capacitor was leaking. I installed the electronic ignition and decided to put on a new rotor. I have a new rotor Echlin Napa # AL62 in my spare parts but it does not look like the rotor that was in the distributor. Is this the correct part? There also seems to be a lot of controversy over coils and their resistance. If a coil is bad, would I expect to see my readings higher than spec or lower? Also, does napa carry a 24volt coil that works for this truck? Thanks
isaac_alaska
SFC
SFC
Posts: 557
Joined: Tue Jul 07, 2015 10:44 pm
Location: Fairbanks, Alaska and Nome, AK

Re: Ignition problems and Napa part # for ignition rotor

Post by isaac_alaska »

coil ohm values were just posted a few days ago, but if yours don't match exactly i wouldn't worry about it. the only reading that tells you for sure your coil is bad is if one of the readings is near infinite (meaning a broken or burned wire inside the coil). this isn't to say a multi meter test is useless, just that it's not always the most reliable. pull the distributor cover inspection plug and make sure you get a 24V reading that switches on and off as the engine cranks on the neg side of the coil. tells you that you have power and that the pertronix is doing its job and switching the coil like it should.
Isaac
Fairbanks, AK
Civilian WM300 on DC3 tires
'52 M37 on 11x16 Michelin
'52 M37 on Apple R-1 tractor tires
Photo Gallery
Post Reply