Premium Gearbox Oil & Seal Kit for Mercury F9.9HP Outboard – Marine Gear Lube + 26-830749 Washers
Two yellow rubber washers on a white background
Premium Gearbox Oil & Seal Kit for Mercury F9.9HP Outboard – Marine Gear Lube + 26-830749 Washers
Two yellow rubber washers on a white background

Premium Gearbox Oil & Seal Kit for Mercury F9.9HP Outboard – Marine Gear Lube + 26-830749 Washers

RM10-10100

  • Dispatched in 2-3 days
  • 30 Day Return Policy
  • In stock, ready to ship
  • Backordered, shipping soon
Our stock levels are dynamic and can change frequently. If a product appears to be in stock, it may have already sold out. Please contact us if you have any questions about availability. Thank you for your understanding.
£29.63 £24.95 Save £4.68
/
Tax included.

Premium Gearbox Gear Lube Oil & Washer Change Kit for Mercury F9.9HP Outboard – complete lower unit service set.

This professional gearbox oil change kit includes everything you need to perform a full lower unit service on your Mercury F9.9HP outboard engine. It features high-quality marine gear oil and genuine-spec stainless steel & silicone sealing washers to ensure reliable protection and leak-free operation.

Kit Contents:

  • 2 x Premium Marine Gear Lube (SAE 90 / 80W-90) – formulated for Mercury & Mariner outboards
  • 2 x Drain / Vent Screw Seals – stainless steel & silicone type (replaces Mercury 26-830749, 12-19183, 12-19183Q02, RM10-10100)

Features & Benefits:

  • Suitable for Mercury 9.9HP four-stroke and equivalent Mariner outboards
  • Premium-grade gear oil provides superior wear, pressure and corrosion protection
  • Stainless-steel & silicone washers provide a perfect seal on 3/8” drain and vent screws
  • Prevents gear oil leaks and ensures long-term gearbox reliability
  • Resists foaming and maintains film strength under high load conditions
  • Ideal for annual servicing or post-season maintenance
  • Compatible with all standard Mercury gear oil filler pumps

Compatibility:

  • Mercury F9.9HP 4-Stroke Outboard
  • Mariner 9.9HP 4-Stroke Outboard
  • Fits all models using 3/8" NPT drain and vent screws

Washer Specification:

  • Replaces OEM part numbers: 26-830749, 12-19183, 12-19183Q02, RM10-10100
  • New yellow stainless steel and silicone version for superior sealing and durability
  • Reusable and corrosion-resistant design

Perform your next gearbox oil change with confidence using this premium service kit. The combination of high-performance marine oil and OEM-spec seals ensures maximum protection and efficiency for your Mercury or Mariner 9.9HP outboard.

For the products under £150 the shipping is £6.99.

Free delivery for most items over £150.

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