Intended for use on spark ignited gasoline engines that do not exceed 30 psi compression
Uses hose adaptors that thread into the spark plug hole and connect at the gauge hose's quick coupler
Reaches hard-to-reach spark plug ports.
Maintains highest compression test reading and resets to zero with a push-button release valve.
Gauge displays individual cylinder pressure
Gauge assembly includes 2-3/4" diameter gauge and 27" flexible hose with quick coupler

Includes