12/4 Timing
Posted: Sat Nov 27, 2021 6:10 pm
This has probably been posted before, but there’s so many I can’t see them all!
I’ve had repeated magneto issues with my ‘29 12/4, so embarked on fitting an overhauled BTH. I’ve set the timing according to the ‘manual’, which specifies 2 1/4” back on flywheel from tdc on #1. I feel I’m close, but starting handle is having a good go at spinning me the other way! I’ve tried retarding the ignition a couple of notches on the vernier cog, but I’m wondering if I’m 180 degrees out? Any suggestions, before I break an arm…?!
I’ve had repeated magneto issues with my ‘29 12/4, so embarked on fitting an overhauled BTH. I’ve set the timing according to the ‘manual’, which specifies 2 1/4” back on flywheel from tdc on #1. I feel I’m close, but starting handle is having a good go at spinning me the other way! I’ve tried retarding the ignition a couple of notches on the vernier cog, but I’m wondering if I’m 180 degrees out? Any suggestions, before I break an arm…?!