Re: 37 120 ignition points replacement and timing

Posted by JWL On 2014/4/22 10:29:04

I set the ignition timing on my '37 115C (similar to your 120C) once using the marks on the flywheel. I removed the LF tire and inner fender panel. Easy enough to see the marks through the hole in the bell housing and access to the distributor this way. Before reassembling, I made a pointer out of heavy wire and fastened it to one of the timing chain cover bolts. I then marked the damper with some white paint to correspond to marks on the flywheel. Now timing adjustments are easy.

Your distributor may also have an "Octane Adjustment" on the bracket fastening the distributor to the engine. It allows for minor timing changes by loosening thumb screws and moving the distributor. It was a feature to allow owners to take advantage of differing gasoline quality back in the day.

(o{}o)