NGK BPR5EFS13 Spark Plug - 2359

NGK BPR5EFS-13 Spark Plug – 2359

The NGK BPR5EFS-13 Spark Plug, stock number 2359, is a dependable replacement for select modern MerCruiser 4.5L and 6.2L gasoline engines. Designed to meet the ignition requirements of Mercury-built marine power packages, this resistor-style plug provides consistent spark delivery for reliable starting, smooth idle quality, responsive acceleration, and efficient combustion.

Built around NGK's proven copper-core electrode design, the BPR5EFS-13 transfers heat efficiently while maintaining stable performance across the wide range of operating conditions encountered in recreational boating. Corrosion-resistant construction adds durability in the engine compartment, while the internal resistor helps minimize radio-frequency interference with onboard electronics.

Replacing worn spark plugs at the proper service interval can help correct hard starting, intermittent misfires, hesitation, rough running, and declining fuel efficiency. For boats powered by a compatible MerCruiser engine, NGK 2359 provides an OE-quality solution for routine maintenance and seasonal tune-ups.

Common Engine Applications

The NGK BPR5EFS-13 / 2359 is specified for select Mercury-built MerCruiser engines, including:

• MerCruiser 4.5L MPI 200 HP V6

• MerCruiser 4.5L MPI 250 HP V6

• MerCruiser 6.2L MPI 300 HP V8

• MerCruiser 6.2L MPI 350 HP V8

• Select Mercury-built 4.5L V6 sterndrive engines

• Select Mercury-built 6.2L V8 sterndrive and inboard applications

This plug is associated with the newer Mercury-designed 4.5L and 6.2L engine families and should not be confused with spark plugs used in older GM-based MerCruiser 4.3L, 5.0L, 5.7L, or earlier 6.2L engines.

Common Boat Applications

MerCruiser 4.5L MPI and 6.2L MPI engines have been offered in numerous bowriders, deck boats, runabouts, and cruisers. Depending on model year and factory engine option, compatible power packages can be found in boats such as:

Sea Ray

• Sea Ray SPX 190

• Sea Ray SPX 210

• Sea Ray SDX 250

• Sea Ray SDX 270

• Sea Ray SLX Series

Bayliner

• Bayliner VR5

• Bayliner VR6

• Bayliner 215

• Bayliner 225

Chaparral

• Chaparral 21 SSi

• Chaparral 23 SSi

• Chaparral 247 SSX

• Chaparral 257 SSX

• Chaparral 267 SSX

Crownline

• Crownline 220 SS

• Crownline 240 SS

• Crownline 255 SS

• Crownline 270 SS

• Crownline 280 SS

Monterey

• Monterey 218SS

• Monterey 238SS

• Monterey 258SS

• Monterey 278SS

Four Winns

• Four Winns H200

• Four Winns H210

• Four Winns H230

• Four Winns H260

• Four Winns HD Series

Additional applications may include compatible MerCruiser-powered models from Stingray, Formula, Cobalt, Rinker, Regal, Glastron, Larson, and other recreational boat manufacturers.

Spark Plug Specifications

• Manufacturer: NGK

• Part Number: BPR5EFS-13

• NGK Stock Number: 2359

• Type: Standard resistor spark plug

• Center Electrode Core: Copper

• Center Electrode Tip: Nickel

• Ground Electrode: Nickel

• Heat Range: 5

• Thread Size: M14 x 1.25

• Thread Reach: 17.5 mm

• Hex Size: 16 mm / 5/8"

• Factory Gap: 1.3 mm / .052"

• Seat Type: Tapered

• Resistance: 5k ohm

• Quantity: Sold individually

Mercury / Quicksilver Cross Reference

The NGK BPR5EFS-13 / 2359 is associated with Mercury Marine replacement numbers including:

• Mercury / Quicksilver 8M0095454

• Mercury 33-8M0095454

• NGK BPR5EFS-13

• NGK 2359

Always verify superseded Mercury numbers against your engine serial number before ordering.

Key Features

• Genuine NGK BPR5EFS-13 marine spark plug

• NGK stock number 2359

• Designed for select MerCruiser 4.5L and 6.2L engines

• Copper-core construction provides efficient heat transfer

• Resistor design helps reduce interference with marine electronics

• Supports dependable starting and smooth acceleration

• Helps maintain efficient fuel combustion

• Corrosion-resistant construction for marine environments

• Excellent choice for scheduled maintenance and tune-ups

Built for Modern MerCruiser Engines

Mercury's newer 4.5L V6 and 6.2L V8 engines require the correct spark plug specification to maintain proper ignition performance. Using the recommended NGK BPR5EFS-13 helps preserve smooth operation, fuel efficiency, and dependable power delivery throughout the RPM range.

Whether you're servicing a Sea Ray, Chaparral, Crownline, Monterey, Four Winns, Bayliner, or another boat equipped with a compatible Mercury-built MerCruiser engine, the NGK BPR5EFS-13 Spark Plug – 2359 provides proven ignition performance and dependable NGK quality.

Fitment Note: Boat manufacturers frequently offered several engine choices within the same model and model year. Boat model alone does not confirm compatibility. Verify NGK BPR5EFS-13 / stock #2359 against your MerCruiser engine model, serial number, or Mercury replacement part number before ordering.