Sierra 18-8802-1 Spark Plug Wire Set for 350 CID 8-Cylinder Prestolite and Mallory Distributors, 1986-1992

The Sierra 18-8802-1 is a conventional-ignition spark plug wire set built for 350 cid 8-cylinder marine engines running a Prestolite (screw down cap) or Mallory distributor from 1986 to 1992. Each wire uses a Kevlar core paired with a durable stainless steel wound conductor, delivering maximum horsepower and consistent engine performance while resisting the vibration and heat stress typical of marine engine bays. Premium silicone jacketing and boots provide high-temperature protection at the plug and distributor connections, and the terminals are corrosion-resistant stainless steel for reliable conductivity in a marine environment.

This set is part of Sierra's MAGFORCE ignition wire line, engineered to be "Electronics Friendly" -- it shields onboard electronic devices and electronic engine controls from RFI and EMI interference while still delivering maximum voltage to the plugs. The distributor end is moisture-proof and molded for a secure, sealed connection, and the exact-fit design is intended for straightforward installation without custom trimming or fitting.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-8802-1
• Cylinders: 8
• Engine Displacement: 350 CID
• Distributor Compatibility: Prestolite (screw down cap) and Mallory
• Year Range: 1986-1992
• Ignition Type: Conventional Ignition
• Core Material: Kevlar
• Conductor: Stainless steel wound
• Jacketing and Boot Material: Silicone
• Terminal Material: Corrosion-resistant stainless steel
• Distributor Cap Seal: Moisture-proof, molded
• RFI/EMI Suppression: Yes, Electronics Friendly design
• Weight: 1.83 pounds
• UPC: 808282194321

Fitment

• 350 cid, 8-cylinder engines with a Prestolite distributor (screw down cap), 1986-1992
• 350 cid, 8-cylinder engines with a Mallory distributor, 1986-1992

Replaces (OEM)

• CDI 631-0010
• Mallory 9-28003
• Mallory 9-28030
• Mercruiser Stern Drive 84-43376A12
• Mercruiser Stern Drive 84-813720A12
• Mercruiser Stern Drive 84-816761A12
• Mercruiser Stern Drive 84-816761Q12
• OMC Stern Drive 503752
• OMC Stern Drive 503755
• Volvo Penta 8757166
• Volvo Penta 8757166-7

Frequently Asked Questions

What engines does the Sierra 18-8802-1 spark plug wire set fit? The 18-8802-1 fits 350 cid 8-cylinder marine engines equipped with either a Prestolite distributor (screw down cap) or a Mallory distributor, for the 1986 to 1992 model years.

Is this a conventional ignition wire set? Yes, the Sierra 18-8802-1 is a conventional ignition spark plug wire set, not a distributorless or coil-on-plug design.

What OEM part numbers does the 18-8802-1 cross-reference to? It replaces CDI 631-0010, Mallory 9-28003 and 9-28030, Mercruiser Stern Drive 84-43376A12, 84-813720A12, 84-816761A12, and 84-816761Q12, OMC Stern Drive 503752 and 503755, and Volvo Penta 8757166 and 8757166-7.

How much does the 18-8802-1 wire set weigh? The Sierra 18-8802-1 spark plug wire set weighs 1.83 pounds.

What materials are the wires made from? Each wire in the 18-8802-1 set has a Kevlar core with a stainless steel wound conductor, covered by premium silicone jacketing and boots, with corrosion-resistant stainless steel terminals.

Will this wire set interfere with onboard electronics? No, the 18-8802-1 is part of Sierra's MAGFORCE line, designed to be Electronics Friendly by suppressing RFI and EMI that could otherwise disrupt electronic engine controls and other onboard devices.

Does the 18-8802-1 work with both Prestolite and Mallory distributors? Yes, the same 18-8802-1 part number covers 350 cid 8-cylinder engines fitted with either a Prestolite distributor (screw down cap) or a Mallory distributor from 1986 to 1992.

Is the distributor connection sealed against moisture? The distributor end of the 18-8802-1 set uses a moisture-proof, molded design for a secure, sealed connection.

How is the 18-8802-1 different from a standard ignition wire set? Beyond standard voltage delivery, the 18-8802-1 adds superior RFI suppression, silicone high-temperature jacketing, and corrosion-resistant stainless steel terminals aimed at marine engine environments.

Is the 18-8802-1 designed for easy installation? Yes, Sierra designed the 18-8802-1 with an exact-fit configuration intended for straightforward installation on the covered 350 cid 8-cylinder engines.

What is the UPC for the Sierra 18-8802-1 spark plug wire set? The UPC for the Sierra 18-8802-1 spark plug wire set is 808282194321.

Does the 18-8802-1 cross-reference to a Volvo Penta part number? Yes, the 18-8802-1 replaces Volvo Penta 8757166 and 8757166-7 among its listed cross-references.