Sierra 18-8801-1 MagForce Spark Plug Wire Set for 262 cid 6-Cylinder Prestolite Ignition Engines, 1986-1992

The Sierra 18-8801-1 is a MagForce ignition wire set built for 262 cid 6-cylinder marine engines equipped with a Prestolite distributor featuring a screw-down cap, covering the 1986 through 1992 model years. Sierra's MagForce wires are engineered to be "Electronics Friendly," shielding onboard electronic devices and electronic engine controls from RFI and EMI interference while still delivering maximum voltage to the plugs. Each wire uses a Kevlar core paired with a durable stainless steel wound conductor for consistent conductivity and long service life, wrapped in premium silicone jacketing and boots for protection against high underhood and bilge temperatures. Spark plug and distributor terminals are corrosion resistant stainless steel for reliable long-term contact. The set is designed as an exact-fit replacement, so installation follows the factory wire routing without modification. This is a universal fit ignition wire set intended for the specific engine and distributor combination listed in the fitment section below, and it is backed by Sierra's Industry Leading Customer Satisfaction Warranty.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-8801-1
• Engine Displacement: 262 cid
• Number of Cylinders: 6
• Distributor Type: Prestolite (screw-down cap)
• Year Range: 1986-1992
• Ignition Type: Prestolite
• Core Material: Kevlar
• Conductor: Stainless steel wound
• Jacket/Boot Material: Silicone
• Terminal Material: Stainless steel
• RFI/EMI Protection: Yes (MagForce electronics-friendly design)
• Fit Type: Universal Fit
• Weight: 1.4 pounds
• UPC: 808282194314

Fitment

• 262 cid, 6-cylinder engine with Prestolite distributor (screw-down cap), 1986-1992

Replaces (OEM)

• 84-816761Q7
• 84-816761A7
• 84-813720A7
• 84-43376A7
• 503750
• 876532-3

Frequently Asked Questions

What engine does the Sierra 18-8801-1 spark plug wire set fit? The 18-8801-1 is built for a 262 cid, 6-cylinder marine engine equipped with a Prestolite distributor that has a screw-down cap, covering the 1986 through 1992 model years.

Is the 18-8801-1 wire set compatible with a Delco distributor instead of Prestolite? No. The 18-8801-1 is designed specifically for the Prestolite screw-down cap distributor used on the 262 cid 6-cylinder engine from 1986-1992; engines with a Delco distributor require a different Sierra wire set.

What OEM part numbers does the Sierra 18-8801-1 cross-reference? This set replaces Mercruiser stern drive numbers 84-816761Q7, 84-816761A7, 84-813720A7, and 84-43376A7, OMC number 503750, and Volvo Penta number 876532-3.

What material is the spark plug wire core made from? The 18-8801-1 uses a Kevlar core combined with a stainless steel wound conductor, giving the wire durability along with strong conductivity for engine performance.

Will these wires interfere with onboard electronics? No. Sierra's MagForce design used in the 18-8801-1 is built to be electronics friendly, suppressing RFI and EMI so it does not disrupt electronic engine controls or other onboard electronic devices while still delivering full voltage to the plugs.

How many cylinders does the 18-8801-1 wire set cover? It is a 6-cylinder set, matching the 262 cid engine's cylinder count.

What are the boots and jacketing made of on this wire set? The 18-8801-1 uses premium silicone jacketing and boots, which provide protection against high underhood temperatures.

Are the terminals on the 18-8801-1 corrosion resistant? Yes, the spark plug and distributor terminals are made of corrosion resistant stainless steel for reliable long-term electrical contact in a marine environment.

How much does the Sierra 18-8801-1 wire set weigh? The 18-8801-1 spark plug wire set weighs 1.4 pounds.

Is the 18-8801-1 an exact-fit replacement or a universal wire kit? It is manufactured to an exact-fit design for easy installation on the specified 262 cid Prestolite-equipped engine, and Sierra lists it with a universal fit type for the covered application.

Does the Sierra 18-8801-1 come with a warranty? Yes, the 18-8801-1 is covered under Sierra's Industry Leading Customer Satisfaction Warranty.

What years does the 18-8801-1 cover for the 262 cid engine? It covers model years 1986 through 1992 for the 262 cid, 6-cylinder engine with a Prestolite screw-down cap distributor.