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Mercury | 100 Hour Service Kit | 8M0097856

Stay on top of routine maintenance with a complete 100 hour service kit for Mercury 75–115HP 1.7L four-stroke outboards. This kit is built around 25W-40 synthetic blend four-stroke oil and bundles the core items you need for an oil change and gearcase service in one order—engine oil, gear lube, a matching oil filter, and a fuel filter to help support clean lubrication and consistent fuel delivery. New seals are included to help reduce the chance of seepage after service.

Serial number range: 1B366823 – 2B094995

What’s Included in This Kit

• 1x 25W-40 Synthetic Blend Four Stroke Oil (Gallon)
• 2x 25W-40 Synthetic Blend Four Stroke Oil (Quart)
• 1x Gear Lube (Quart)
• 1x Oil Filter
• 1x Fuel Filter
• 1x Oil Drain Seal
• 2x Gearcase Drain Seals

Why This 100 Hour Service Kit Matters

• Simple, complete service: Covers the common 100 hour oil and gearcase maintenance needs in one kit.
• Cleaner protection: Synthetic blend oil supports strong film strength and consistent lubrication.
• Fresh filtration: New oil and fuel filters help support reliable operation and smoother performance.
• Seals included: Helps support proper sealing at drain points after reinstalling the screws and plugs.

FAQ

Why are there 2 gearcase drain seals included?
Many gearcases use sealing washers at both the drain and vent screws, so replacing them together helps support a proper seal.

Should I replace the seals every time?
Yes, replacing drain seals during service helps reduce the chance of seepage after reinstalling the screws.

How do I confirm this matches my engine?
Verify your outboard falls within the listed serial number range before ordering.

• Engine Application
  • 75 HP EFI - 1B366823 – 2B094995
  • 80 HP EFI - 1B366823 – 2B094995
  • 90 HP EFI - 1B366823 – 2B094995
  • 100 HP EFI - 1B366823 – 2B094995
  • 115 HP EFI - 1B366823 – 2B094995