Re: How Important is OMC Ignition Timing?

[Anonymous]

quote legendre:

What defines that final, high-RPM timing angle figure? Is it a certain, factory-specified number of degrees BTDC (as with every other engine), or just wherever it happens to end up, if ‘timing’ is set for the moment of max spark energy – on an OMC?

I don’t buy it. And again, ask yourselves: Why does the OMC timing tool exist?

The timing tool, or "gapping the points" exist to adjust timing of the spark (the points opening) relative to the position of the coil & magnet.

Timing of the spark relative to TDC (advance) is controlled by the position of the magneto plate (which also controls the throttle via the magneto plate cam)