Mercury Verado L6 300-Hour Maintenance & Oil Change Kit – Quicksilver OEM – Fits 200/225/250/275/300/350/400/400R HP (4.8" Torpedo Lower Unit) – 25W-40 Oil – Includes Water Pump, Thermostat, Spark Plugs & More

Genuine Quicksilver Mercury Verado L6 300-Hour Maintenance & Oil Change Kit Complete OEM Service Bundle for Verado Inline-6 Outboards with 4.8" Torpedo Lower Unit – 200, 225, 250, 275, 300, 350, 400 & 400R HP

This factory-assembled Quicksilver kit covers the full Mercury-recommended 300-hour major service for Verado L6 (inline 6-cylinder) 4-stroke outboards equipped with the 4.8" torpedo lower unit gearcase (original/standard size; measure the bushing diameter at the anti-ventilation plate to confirm—4.8" vs. 5.44" for later/heavier-duty variants). It includes a comprehensive set of genuine components for engine oil change, fuel filtration, lower unit gear lube, cooling system refresh, ignition maintenance, and more—helping prevent wear, maintain efficiency, and support warranty compliance during high-hour operation.

Kit Includes (All Genuine Quicksilver / Mercury OEM Parts):

• 2 × Gallons Quicksilver SAE 25W-40 Semi-Synthetic 4-Stroke Marine Engine Oil # 8M0078623 (≈2 gallons total — provides full capacity plus reserve; typical Verado L6 fill is ~7.4 quarts / ≈1.85 gallons per engine with filter change)
• 1 × Quicksilver Oil Filter # 877769Q01 (premium filtration to keep oil clean and flowing)
• 1 × Quicksilver In-Line Fuel Filter # 879885Q (protects fuel delivery from contaminants)
• 1 × Quicksilver Water Separator Fuel Filter # 8M0060041 (critical for removing water and debris from fuel)
• 1 × Quicksilver 817275A09 Torpedo Water Pump Repair Kit (impeller, gaskets, seals, and housing parts for reliable cooling system service)
• 1 × Thermostat Assembly # WSM-775-60 (ensures proper engine operating temperature)
• 6 × Iridium Spark Plugs NGK ILFR6G-E (OEM-spec laser iridium plugs for strong ignition and longevity in high-performance Verado applications)
• 1 × Quicksilver Serpentine Belt # 880566Q14 (alternator/drive belt replacement)
• 1 × Seachoice Anode Kit # 95121 (sacrificial anodes for corrosion protection)
• 1 × Quart Quicksilver High-Performance Gear Lube # 858064Q01 (SAE 90 marine-grade protection for the lower unit; ~32–34 oz typical fill)
• 1 × Oil Drain Plug Seal # 555-24 (new seal for leak-free oil service)
• 2 × Lower Unit Fill/Drain Plug Seals / Gaskets # 830749 (fresh seals for secure gearcase reassembly)

Brand New in Original Packaging – Never Opened

Important Fitment & Usage Notes:

• Compatible with Mercury Verado L6 models: 200 HP, 225 HP, 250 HP, 275 HP, 300 HP, 350 HP, 400 HP, 400R (including high-performance variants) equipped with the 4.8" torpedo lower unit (original gearbox; not for 5.44" variants—measure bushing diameter if unsure)
• Oil specification: 25W-40 semi-synthetic — suitable for Verado engines; confirm exact recommendation in your owner’s manual and by engine serial number (some applications prefer 25W-50 for extreme conditions)
• Oil capacity (per engine): Approximately 7.4 quarts with filter change — fill gradually, run engine briefly, check dipstick, top off as needed
• Gear lube capacity: ~32–34 oz per lower unit — fill from bottom plug to top vent overflow
• This kit aligns with / replaces older Mercury 300-hour service components (similar to P/N MC8M0097859 variants but tailored with 25W-40 oil and 4.8" torpedo specifics)
• Always verify your engine serial number, lower unit type, and owner’s manual for exact match. Message with serial details if you need help confirming compatibility.

Shipping Notice: Oil and lubricants cannot be shipped outside the continental United States — no PR, HI, AK, or US territories.

This comprehensive OEM kit simplifies the 300-hour service, uses only Mercury-approved parts, and helps extend engine life while keeping your Verado reliable and efficient. Fast shipping — great for major maintenance intervals.

Questions about fitment, serial number verification, lower unit measurement, or anything else? Just ask — happy to assist! ?