ARM127MK2-300 Mounted as shown in the picture

Front

Back

There are 2 cams that ‘clips’ on the side of the cut-out to secure the meter.

The left cam is not visible in this picture.

Size of the cut-out is 1.453 x 2.073 inches.

The –300 meter comes with a 1:1 drawing of the cut-out for the user to use as guide.

Sensor is mounted as shown.

Secured with a tamper proof security lock.

Mounts on a flat surface and use 2 screw to secure the –400 meter as show in the picture.

Clip the sensor to spark plug wire and screw the ground terminal to any appropriate metal part of the engines chassis