Mercury Mariner Outboard Gearbox Gear Oil Drain Fill Plug Seal Gaskets x 2 26-8M0204693 26-830749
PRODUCT DETAILS
Pair of Gearbox Gear Oil Drain / Fill Plug Seals for Mercury Mariner Outboards
Premium-quality aftermarket gearbox gear oil drain and fill plug seal gaskets for selected Mercury and Mariner outboard engines.
Supplied as a pair of 2 seals, ideal for replacement when carrying out a gearbox / lower unit gear oil change.
Designed as replacement seals for selected Mercury and Mariner applications using:
26-8M0204693 / 26-830749
Package Contains
2 x Gear Oil Drain / Fill Plug Seal Gaskets
Fits Selected Mercury & Mariner Outboards
Suitable for selected Mercury and Mariner outboard gearcases requiring the corresponding gear oil drain / fill plug seals.
Mercury and Mariner have used different drain plug seals across different engine and gearbox generations, so please confirm compatibility using your:
- Engine model
- Engine serial number
- Existing seal
- Original Mercury / Mariner part number
Please do not order by engine horsepower or appearance alone.
Replaces Mercury / Mariner Part Numbers
- 26-8M0204693
- 8M0204693
- 26-830749
- 830749
OEM part numbers are used for identification and reference purposes only.
Product Features
- Pair of 2 seals
- Gear oil drain plug seal
- Gear oil fill plug seal
- Gearbox drain plug gasket
- Gearbox fill plug gasket
- Gearcase drain screw seal
- Gearcase fill screw seal
- Lower unit oil drain washer
- For selected Mercury outboards
- For selected Mariner outboards
- Marine-grade quality aftermarket part
- Manufactured to OEM specifications
- Designed as a replacement for the corresponding OEM application
- Helps provide a reliable seal around the gear oil plugs
- Ideal for routine gearbox servicing
- New
- UK stock
Important – GEARBOX / GEAR OIL Seals
These seals are for the GEARBOX / LOWER UNIT gear oil drain and fill plugs.
They should not be confused with the engine oil sump / drain plug gasket used on a 4-stroke engine.
When carrying out a full service, the engine oil drain plug and gearbox gear oil drain/fill plugs may use completely different seals.
Recommended Replacement During Gear Oil Service
We recommend inspecting the drain and fill plug seals whenever carrying out a gearbox / lower unit oil change.
Previously used seals can become compressed, damaged or deteriorated.
Replacing the seals during routine servicing helps maintain a reliable seal around the gear oil drain/fill plugs and can help reduce the risk of:
- Gear oil leakage
- Water entering the lower unit
- Contamination of the gearbox oil
Important – Please Check Compatibility
Mercury and Mariner have produced many different outboard and gearcase configurations, and different drain plug seals are used depending on the application.
Before purchasing, please check:
- Engine is Mercury or Mariner
- Exact engine model
- Engine serial number
- Existing drain/fill plug seal
- Original Mercury / Mariner part number
For the safest identification, confirm that your application requires:
26-8M0204693 / 26-830749
If the seal looks the same as yours, this does not always mean it is the correct one for your outboard.
If you are unsure, please send us your engine model and serial number before purchasing and our technical team will be happy to check compatibility.
Why Buy From SSI Marine?
- Marine-grade aftermarket & OEM-spec parts
- Workshop-tested products
- More than 10 years supplying outboard parts
- UK stock
- Same working day dispatch before 1 PM Monday–Friday
- Royal Mail Tracked 24
- Technical support from experienced outboard specialists
- Collection available from Leigh, Greater Manchester
- Workshop open Monday–Friday, 9 AM–5 PM
SHIPPING & DELIVERY
Delivery & Returns Policy
Delivery
Standard Delivery
- £6: Royal Mail Tracked 24 Service
- £3.99: Large Letter - Royal Mail 1st Class Post (Untracked)
We offer free delivery on all orders over £150 (excludes outboard engines).
Orders placed before 1:00 PM (Monday-Friday) are usually dispatched the same working day.
Most parcels are delivered within 24 hours, but please allow extra time for courier delays that may occur outside our control.
For outboard engines, please contact us for a delivery quote.
Important: Please ensure your shipping address is correct before completing checkout. SSI Marine is not responsible for parcels sent to an incorrect address provided by the buyer.
Tracking Your Order
Once your order has been dispatched, you will receive a tracking number via email (after 5 PM on the day of dispatch).
Tracking is available only for parcels sent via Royal Mail Tracked 24.
Large Letter orders are sent via Royal Mail 1st Class Post (untracked).
Returns
We accept returns of unused and undamaged items within 30 days of purchase.
Returned items must be in sellable condition and include the original packaging.
Please do not tape, label, or write directly on the product's original box.
Important: Do not return items in their original product boxes only, they must be placed inside a protective outer box or bag. Parcels returned like the example below will be subject to a 20% restocking fee.
Return shipping costs are the customer's responsibility.
Please include your order details and reason for return inside the parcel.
Refunds
Refunds are issued for the item purchase price only (shipping costs are non-refundable).
All refunds will be made using the same payment method as your original order.
Items returned in poor condition or without proper packaging may incur a 20% restocking fee.
YOU MIGHT ALSO LIKE
OFFICIAL PARTNERS OF
