keeping them safe from the harsh marine environment when not in use
Clean installation-all cables can be run from one side of the Z-bar
Ignition Control: 
Connect your transducer to your sonar device with this 30'(9M) 8-pin extension cable
You'll need Allen head wrenches to install this circuit breaker
Regitar USA Ignition Module f/Mercruiser Engines: 350MAG MPI, 4.3L, 5.0L, 5.7L Engines (1981-97) w/THUNDERBOLT Electronic Ignition [RMG005] Marine Navigation & Instruments | GPS - Track Plotter keeping them safe from theIgnition Module for Mercruiser Engines: 350MAG MPI, 4. 3L, 5. 0L, 5. 7L Engines (1981 97) with THUNDERBOLT Electronic Ignition Ignition Module for Mercruiser Engines: 350MAG MPI, 4. 3L, 5. 0L, 5. 7L Engines (1981 97) with THUNDERBOLT Electronic Ignition. Engine Brand: Mercury Mercruiser Fitment: 350MAG MPI, 4. 3L, 5. 0L, 5. 7L engines (1981 97) with THUNDERBOLT electronic ignition Brochure (pdf)