300 Hour Service Kit for Mercury Verado 200-400 L6 Engines

300 Hour Service Kit for Mercury Verado 200-400 L6 EnginesThe 300 hour service is the most comprehensive milestone in your Mercury Verado L6's maintenance schedule and this kit has everything you need to do it right, all in one order. No hunting down individual part numbers, no second guessing oil specs. USP Marine's technicians have put together the exact fluids, filters, and wear items Mercury requires at 300 hours, spec'd with Liqui Moly Marine oils and genuine OEM parts. What's in the Kit & Why It

The 300-hour service is the most comprehensive milestone in your Mercury Verado L6's maintenance schedule — and this kit has everything you need to do it right, all in one order. No hunting down individual part numbers, no second-guessing oil specs. USP Marine's technicians have put together the exact fluids, filters, and wear items Mercury requires at 300 hours, spec'd with Liqui Moly Marine oils and genuine OEM parts.

What's in the Kit & Why It Matters

This kit includes 8 liters (8.5 quarts) of Liqui Moly Marine Engine Oil 25W-50 and 1 liter (1.06 quarts) of Liqui Moly Marine High Performance Gear Oil 85W-90. Both oils meet API SM/NMMA FC-W® certification and are fully approved for Mercury Verado engines. We include an extra quart of engine oil for top-offs — engines run hard above 6,000 RPM can consume up to 1 liter over a 100-hour period. Check your dipstick mid-interval if you push it. Need to skip the oil? Select the "No Oil Included" option above.

Kit Includes:

• (2) 4-Liter Liqui Moly Marine Engine Oil 25W-50 (select "No Oil" option to exclude)
• (1) 1-Liter Liqui Moly Marine High Performance Gear Oil 85W-90
• (1) OEM Oil Filter — Part #: 35-877769K01
• (1) OEM In-Line Fuel Filter — Part #: 35-879885Q
• (1) OEM Oil Drain Plug Seal — Part #: 26-888593
• (2) OEM Gearcase Drain Seals — Part #: 26-830749
• (1) OEM Serpentine Belt — Part #: 57-880566Q14
• (1) OEM Water Pump Kit — Part #: 8M0100526
• (1) OEM Thermostat with Oetiker Clamp — Part #: 8M0174561
• (6) OEM Spark Plugs
• (1) OEM Belt Tensioner
• Optional: Zinc Kit (available as a dropdown upgrade — see options above)

Zinc Kit Upgrade — Should You Add It?

If your boat spends time in salt water, adding the zinc kit is strongly recommended. Zincs are your engine's first line of defense against galvanic corrosion and should be replaced at every 300-hour service. Select the appropriate zinc kit for your engine — 350–400HP or 200–300HP — from the dropdown above.

Compatible Engines:

200–300HP L6 Verado:

• Mercury 200 Verado / 200 Pro Verado (4-Stroke 6 Cyl.) — All serial ranges through 2B577715
• Mercury 225 Verado (4-Stroke 6 Cyl.) — All serial ranges through 2B144123 & Up
• Mercury 250 Verado / 250 Pro Verado (4-Stroke 6 Cyl.) — All serial ranges through 2B577715
• Mercury 275 Verado (4-Stroke 6 Cyl.) — All serial ranges through 2B144123 & Up
• Mercury 300 Verado / 300 Pro Verado (4-Stroke 6 Cyl.) — All serial ranges through 2B577715

350–400HP L6 Verado:

• Mercury 350 Pro Verado (4-Stroke 6 Cyl.) — 2B141124 & Up
• Mercury 350 Verado (4-Stroke 6 Cyl.) — 2B141617 & Up
• Mercury 350SCi Verado 6 Cyl. — 1B716557 thru 2B143542
• Mercury 400R 2.6L L6 Verado — 2B618256 & Up
• Mercury 400 Verado (4-Stroke 6 Cyl.) — 2B141124 & Up