CP Performance - Wiring Harnesses 30 Ft. Boat Wiring Harness, Wired for Voltmeter and Mercury Style Cannon Plug. Wiring your boat does not have to be a hassle due to tangled wires, bad connections, and guess work. Poor wiring can ruin a boat. These boat harnesses use 275 degree, thermal crossed linked wire that will not kink and is abrasive resistant. jet boat wiring harness | eBay Save jet boat wiring harness to get e-mail alerts and updates on your eBay Feed. + Items in search results. Sea Doo 3-Way Harness NEW OEM 3Way Wiring Loom 1996-2002 Explorer Jet Boat See more like this. Sea Doo Jet Boat 1995 Speedster Sportster Main Wire Harness Start Stop Engine. Pre-Owned. $45. Guaranteed by Mon, Jun. 10.