Equip your battery-isolator setup with the Yamaha MAR-6CEIS-1L-ED lead with 100A circuit protection. The assembly includes a circuit breaker and a 14-foot lead to the battery. Yamaha lists this lead for 4.2L applications; confirm the exact engine and rigging requirements before purchase.
Match the part number and circuit-protection requirements to your installation. Contact SIM Yamaha with your engine model and serial number for help checking the correct lead.