Yamaha XTO 425 / XF425 / XF450 / 450 V8 5.6L Outboard Full Synthetic Maintenance Kit - 5W-30 Oil Change + Lower Unit HD Gear Lube + Fuel Filter - OEM Parts (2018+ Models)

Unleash maximum offshore performance and durability on your Yamaha XTO 425 / XF425 (5.6L V8) 4-stroke outboard (2018+) with this elite full synthetic maintenance kit. Powered by Yamalube 4M Full Synthetic 5W-30 FC-W oil—Yamaha's premium marine oil—it delivers superior lubricity for reduced friction (potentially boosting fuel economy), outstanding cold-start protection, all-climate versatility, and exceptional resistance to corrosion, wear, and fuel dilution in extreme marine conditions.

This complete kit covers engine oil changes, lower unit HD gear lube services, primary fuel filter replacement, spark plug upgrades with NGK Iridium, and all necessary gaskets—using genuine Yamaha OEM parts for factory-matched reliability. Ideal for 100-hour/annual services or high-demand offshore runs, it ensures peak power, smooth operation, and extended engine life.

Kit Includes (Genuine/OEM Where Specified):

• 9 Quarts Yamalube 4M FC-W 5W-30 Full Synthetic Outboard Engine Oil — NMMA FC-W certified full synthetic with Yamaha-exclusive additives for enhanced lubricity, potential fuel savings, excellent all-climate performance, and top marine protection.
• 1 Genuine Yamaha Oil Filter (N26-13440-02-00 or supersession) — OEM precision filtration for clean oil and prolonged engine health.
• 1 Genuine Yamaha Engine Oil Drain Gasket — Leak-proof seal for secure draining.
• 2 Quarts Yamalube HD SAE 90 Lower Unit Gear Lube — Heavy-duty protection for gears, bearings, and water resistance in demanding offshore environments.
• 3 O-Rings / Lower Unit Drain/Fill Gaskets — Durable seals to eliminate leaks post-service.
• 1 Genuine Yamaha Primary Fuel Filter — Traps contaminants for clean fuel delivery and system reliability.
• 8 Yamaha OEM NGK Iridium Spark Plugs (ILMAR7E-9 or equivalent) — Factory-spec iridium for superior ignition, longevity, easier starts, and optimal combustion on the 5.6L V8.
• 1 PWCParts Gear Lube Quart Pump — Supports clean, efficient filling (perfect for in-water changes on XTO models).
• 1 PWCParts Oil Change Reminder Decal — Simple reminder for service intervals.
• 1 PWCParts Disposable Funnel — Spill-free tool for easy oil addition.

Applications: Fits ALL Yamaha 2018 and newer XTO 425 / XF425 5.6L V8 4-stroke outboards (including related variants). (Note: Confirm your exact model, serial number, and year before purchase. Not for non-XTO models or different displacements.)

Why Choose This Kit?

• Features 100% genuine Yamaha OEM parts (oil, filter, gaskets, fuel filter, iridium plugs) with full synthetic 5W-30 for elite V8 performance.
• Comprehensive all-in-one bundle saves time and money vs. separate sourcing.
• HD gear lube upgrade provides extra durability for heavy offshore loads.
• Includes practical tools for mess-free, professional-grade DIY service (leverages Yamaha's in-water gear lube change convenience).
• Enhances power, efficiency, cold-weather starts, ignition reliability, and long-term engine durability.

Important Notes: Engine oil capacity is approximately 7.8L / 8.2 US quarts (with filter change)—9 quarts ensure a full refill with reserve (fill gradually, run engine, and check level). Lower unit capacity is around 1.95–2.06 quarts—2 quarts HD cover complete service. Always consult your Yamaha owner's manual for precise procedures (including in-water gear changes), level checks (engine warm/level), capacities, and intervals. Professional service recommended for V8 models if unsure. Verify fitment or contact us with questions prior to ordering.

Order today to keep your Yamaha XTO V8 dominating offshore with full synthetic power and iridium precision!