ARCO Marine Premium Replacement Distributor Cap f/Mercruiser Inboard Engines (Late Model)

The ARCO Marine Premium Replacement Distributor Cap for Mercruiser Inboard Engines (Late Model) is an essential ignition system component for boaters relying on late-model V6 4.3L Alpha and Bravo Mercruiser or Volvo Penta HVS inboards. After years on the water, any experienced angler knows that engine reliability is non-negotiable—a failed distributor cap leaves you dead in the water far from the ramp. This direct OEM replacement restores proper electrical distribution to your spark plugs, ensuring consistent cold starts, smooth acceleration, and dependable performance whether you're running a deep-sea charter or weekend fishing expedition.

The distributor cap houses the rotor contacts and ceramic insulation that direct high-voltage current from the ignition coil to each cylinder's spark plug in precise firing sequence. Over time, salt spray corrosion, UV degradation, and thermal cycling cause the cap's insulating material to crack or the contact surfaces to corrode, resulting in weak spark, misfires, or complete ignition failure. ARCO Marine's premium construction uses durable dielectric materials and marine-grade corrosion resistance designed to withstand the harsh saltwater and humidity environment inherent to inboard engine compartments. This cap directly replaces Mercruiser OEM part number 888731, ensuring exact fit and electrical performance specifications for your V6 distributor assembly.

Boaters with late-model Mercruiser or Volvo Penta inboards—particularly those operating in saltwater or high-humidity coastal regions—will appreciate the extended service life and reliability this replacement delivers. Installation is straightforward for any owner with basic mechanical skill: remove the four hold-down clips, disconnect the spark plug wires, lift off the old cap, and seat the new ARCO cap with wires reattached. Compact at 5 x 3 x 8 inches and weighing only 0.7 lbs, it ships easily and fits snugly in your engine's existing distributor housing. Keep one aboard as emergency spare equipment to avoid being stranded during your next offshore adventure.