Six yellow rubber washers on a white background
Two yellow rubber washers on a white background

6x Gearcase Drain Vent Screw Seals for Mercury Mercruiser Replaces 26-830749

RM10-10100

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  • 30 Day Return Policy
  • Low stock - 3 items left
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Regular price £20.74 Sale price£12.95 Save £7.79
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6x Gearcase Drain & Vent Seals

Premium Rubber-Coated Stainless Steel (Replaces 26-830749)

This essential maintenance kit includes six premium quality gearcase drain and vent screw seals. These are the modern "yellow" type seals, featuring a high-grade stainless steel core with a durable rubber coating. Unlike older fiber washers, these are engineered to provide a superior, tear-resistant seal that prevents water intrusion into your gear lube, protecting your lower unit from catastrophic damage.

RELIABILITY: Manufactured by RecMar to meet or exceed OEM 26-830749 specifications for maximum corrosion and oil resistance.

Key Features

  • ✔ Direct fit for 3/8-16 drain/fill screws
  • ✔ Stainless steel core prevents compression failure
  • ✔ Modern yellow rubber coating for leak-free sealing
  • ✔ Essential for every gear lube change

Technical Specs

Outer Diameter: 14 mm (0.55 in)
Inner Diameter: 9 mm (0.35 in)
Thickness: 1.5 mm (0.06 in)
Material: Rubber-Coated Stainless Steel
Quantity: Pack of 6

Compatibility / Fitment Guide

Make/System Model/Application Notes
Mercruiser Alpha One, Gen II, Bravo I, II, III All standard sterndrives
Mercury / Mariner 30HP to 300HP (2-Stroke & 4-Stroke) Fits standard 3/8-16 screws
Mercury EFI 40, 50, 60, 75, 115, 150 EFI Models 4-Stroke outboard units
Mercury Verado 135HP - 400HP Models Universal gearcase seal

OEM Cross Reference

Mercury / Mercruiser 26-830749, 26-8M0204693, 12-191833, 12-19183Q02
Sierra Marine 18-2945, 18-2430
GLM 85621
RecMar RM10-10100

Questions & Answers

Is this a genuine original part?

This is a premium quality RecMar aftermarket replacement part, manufactured to meet or exceed original equipment (OE) standards for fitment and performance.

How do I know if it is compatible?

We recommend checking the SKU/MPN and Cross Reference list provided above. If your original part number matches any of these, it is a guaranteed fit for all standard Mercury 3/8-16 gearcase screws.

Can these be used on Japanese models?

These seals are generally not compatible with Mercury outboards of Japanese origin (e.g., some smaller Tohatsu-based units) that use metric thread drain plugs. Please verify your screw size is 3/8-16.

Note: Please verify your original part number against the references above before purchasing. Always replace your seals during every gear lube service at 4boats.co.uk.

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

Free delivery for most items over £150.

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