Aftermarket Yamaha 300HP 4-Stroke Service Kit (2008-19) | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Yamaha F300 Four-Stroke Service Kit - Kit Reference: Application-matched aftermarket service kit

New aftermarket routine scheduled-maintenance package assembled for the listed 300 HP Yamaha outboard family. The kit groups the matched cooling-system, ignition, fuel-filtration, lubrication, sealing and corrosion-protection components identified below. The 2008-2019 range spans two F300 engine generations; thermostat, oil-filter and water-pump references must be selected by the complete model code.

⚙️ Key Features

• Application-matched service package for 300 HP Yamaha outboards

• Engine platform: V6 EFI four-stroke

• Verified application period: 2008-2019

• Every listed service component is identified by its individual Yamaha or verified cross-reference number

• Water-pump, filter, spark-plug, thermostat, drain-seal and anode specifications kept separate by engine generation

• Complete engine model code and serial identification must be confirmed before installation

🧰 Kit / Assembly Contents

• 6 × Spark plug - Part Number: NGK LFR6A-11

• 2 × Thermostat - Part Number: 67F-12411-01 / 6AW-12411-00 (selected by F300A 3.3 L or later F300B/Offshore 4.2 L family)

• 1 × Engine-oil filter - Part Number: 69J-13440-04 / N26-13440-03 (selected by engine family)

• 1 × Fuel-filter element - Part Number: 6P3-WS24A-02

• 1 × Engine-oil drain-plug gasket - Part Number: 90430-14M09

• 2 × Gearcase drain-plug gasket - Part Number: 90430-08020

• 1 × Complete water-pump repair kit - Part Number: 6P2-W0078-00 / 6CE-W0078-00 (selected by 3.3 L or 4.2 L gearcase family)

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• Application-matched aftermarket service kit assembled from individually serviced Yamaha components

• No single Yamaha complete-kit supersession has been confirmed for this custom service package

• Later or earlier component revisions may apply within the listed production period; use the engine model and original component number to confirm each replacement

OEM / Related Numbers:

• NGK LFR6A-11

• 67F-12411-01

• 6AW-12411-00

• 69J-13440-04

• N26-13440-03

• 6P3-WS24A-02

• 90430-14M09

• 90430-08020

• 6P2-W0078-00

• 6CE-W0078-00

Aftermarket / Verified Equivalents:

• NGK: LFR6A-11 direct spark-plug references

• Recmar: component-level replacements corresponding to the listed Yamaha service references

• Sierra Marine: water-pump, thermostat, filter, anode and sealing equivalents where directly cross-referenced to the listed Yamaha numbers

🚤 Compatibility

Commonly used on:

• F300AET/F300A 3.3-litre variants

• F300B, F300UCA, F300XCA and related 4.2-litre Offshore variants

Typically suits:

• HP Range: 300 HP

• Engine Type: V6 EFI four-stroke

• Year Range: 2008-2019

• Model / Serial Identification: Yamaha fitment is controlled by the complete model code, production year and regional serial prefix. Confirm the engine identification plate and the original water-pump, filter and ignition references before ordering.

🔌 Function

Groups the principal scheduled-service components needed to maintain reliable ignition, clean fuel and oil circulation, correct cooling-water flow, leak-free drain and thermostat joints, and effective sacrificial-corrosion protection. Replacing the matched consumables together helps reduce repeated disassembly and supports consistent annual or hour-based servicing.

Common signs service is required:

• Annual, 100-hour or manufacturer-specified maintenance interval has been reached

• Previous service history is unknown or incomplete

• Hard starting, misfire, fouled plugs or reduced throttle response

• Restricted fuel flow, contaminated filters or fuel starvation under load

• Weak tell-tale flow, rising engine temperature or an overheat warning

• Cracked, hardened or missing water-pump impeller vanes

• Oil or gear-lubricant seepage from deteriorated drain-plug seals

• Sacrificial anodes are heavily consumed, loose or no longer making clean metal-to-metal contact

📦 Condition

• Brand-new aftermarket service kit

• Supplied as new replacement components

• Supplied in suitable retail or equivalent packaging