Re: omc 4hp timing marks

[legendre]

quote Wedgie:

I will re set it now on the right mark and see if it opens in the middle. (…) I assume the timing light should be set at 0 degrees ?

Not sure what you mean by "set at 0 degrees". The light flashes when the plug fires.. and only +if+ the plug fires.

(Some folks don’t know this, but the inductive timing light is a great diagnostic tool. Even if you’re not checking timing, it will tell you if the plug +actually+ sparks when under compression.. A coil impulse alone isn’t enough, the plug has to actually fire across the gap for the light to flash. Just because a plug will fire in free-air, doesn’t mean it’s actually firing under load. It’s great for t-shooting ignition issues, and has served me very well over the years.)

ETA: Some setups (like automotive) allow you to adjust timing on the fly, but most of the time, when you’re dealing with small engines or motorbikes, you have to T&E it. Nudge it one way, and re-check.. repeat until the timing is as close as you can get it before you totally run out of patience.. 😉