[Bob Ashlock]

Hej George, it is fantastic that you have the Delta Mark Ten working. That Capacitive Discharge ignition should help overcome spark-plug fouling problems in that 2-stroke.

So, you say it's a 3-cylinder, 2-stroke engine. In other words, it has twice the spark rate that a 3-cylinder 4-stroke engine would give. In fact, your engine has the same spark rate as a 6-cylinder 4-stroke engine. So, you should be able to select the 6-cylinder setting on that tachometer and achieve the correct readings.

Hopefully this will help you! -Bob