Magneto RPM Switch

The ETC Inc. RPM Switch for a 12-Volt System is a unique control device that has been designed to work with all Mallory Magnetos. Models are also available for the Vertex Standard Internal Coil and External Coil Magnetos. Other types of ignition are available on request. 

Adjustable RPM setting is provided by an adjustable push wheel switch which selects the RPM in increments of 100 from 2,000 to 9,900 RPM causing a switch point when the RPM exceeds the set point. The normally closed contact (gray wire) is then switched to the normally open contacts (orange wire) from the common (green wire) supply of plus volts or a ground. It will switch a 20-amp circuit. 

This unit has been designed using the newest linear, digital, and power devices. The device weighs only eight ounces and is small in size at 4.0” x 2.25” x 1.80” with two additional one-inch mounting flanges on each side. Over all it has a mounting plate with holes for grommets and/or DZUS fasteners. 

The optional tachometer output is capable of readings of +12,000 RPM. It is an integral part of the signal input of the magneto and will indicate RFI (radio frequency interference) of the ignition system. It is a valuable addition to the rev limiter. We also make two versions. One being a 5-volt square wave output and the other being a 12-volt square wave output for accommodation of variety of tachometers.

[click to enlarge diagram]