Timing Tool / Shunt for Delco EST Ignition, Mercruiser, Volvo Penta, Indmar

Timing Shunt / Tool for Delco EST Ignition

Used on Mercruiser, OMC, Volvo Penta, Indmar, PCM 

Used on most Mercuiser 3.0L Engines

Shunt plugs into the distributor, and enables  base timing mode on the ignition system.