Hi

Don't the preset the gap setting?
I buy them and install them as they come.
If you do not flood the carp with second pull, it starts with no prob.

Regards

Just my comment on this issue. I fly a DI 503 and I detected a difference in power when running on SI or both. On a test that I did the engine did not reach full revolutions (6300 rpm) during SI. I would say there is a definate difference in power output.