Home › Forum › Ask A Member › 1956 Mark 25 ignition timing question › Re: 1956 Mark 25 ignition timing question
April 8, 2018 at 8:28 pm
#73629
quote Dave Bernard:
with the new gas I would stay with .235 or lower. just me.
New gas would that be E10 ❓ He will use E free in the Mark 25. I will start with .235 max, there is a mag stop that can be adjusted to increase advance if desired to try.