PRODUCT DETAILS
Water Pump Base / Oil Seal Housing for Yamaha Outboards
Premium-quality aftermarket water pump base housing / oil seal housing for selected Yamaha 40 HP, 50 HP and 60 HP outboard engines.
Suitable for selected 2-stroke and 4-stroke Yamaha models using part number 63D-44341-00.
This housing is fitted in the lower unit directly below the main water pump assembly and houses the driveshaft oil seals. Yamaha parts diagrams identify 63D-44341-00 as HOUSING, WATER PUMP.
Fits Yamaha Outboards
2 Stroke
40 HP
- 40V – selected 1997 onwards models
- 40Y – selected 2004–2007 models
50 HP
- 50H – selected applications
Yamaha's 2005 40V parts catalogue specifically shows 63D-44341-00 in the lower casing/water-pump assembly.
4 Stroke
40 HP
- F40A
- F40D
- Selected other F40 applications using 63D-44341-00
50 HP
- F50A
- F50F
- Selected other F50 applications using 63D-44341-00
60 HP
- F60A
- F60C
- Selected other F60 applications using 63D-44341-00
For example, Yamaha's F40D catalogue and F60A catalogue both explicitly list 63D-44341-00 as the water-pump housing.
Replaces Yamaha Part Numbers
- 63D-44341-00
- 63D-44341-00-00
- 63D4434100
- 63D443410000
OEM part numbers are used for identification and reference purposes only.
Product Features
- Water pump base housing
- Water pump lower housing
- Oil seal housing
- Driveshaft oil seal housing
- Fits selected Yamaha outboards
- 40 HP
- 50 HP
- 60 HP
- Selected 2 Stroke applications
- Selected 4 Stroke applications
- Replacement for 63D-44341-00
- Marine-grade aftermarket part
- Manufactured to OEM specifications
- New replacement part
- UK stock
Important – Housing Only
This listing is for the:
WATER PUMP BASE / OIL SEAL HOUSING
Please check the product contents shown in the pictures.
Depending on the product you are supplying, oil seals and O-ring may not be included. Yamaha diagrams show the housing, oil seals, O-ring and oil-seal cover as separate components.
Important – Please Check Compatibility
Please do not order by horsepower or appearance alone.
Yamaha used different lower-unit and water-pump configurations across 40 HP, 50 HP and 60 HP engines.
Before purchasing, please check:
- Exact engine model
- 2 Stroke or 4 Stroke
- Production year
- Engine serial number
- Existing housing
- Original Yamaha part number
For the safest identification, check that your engine requires:
63D-44341-00
If the part 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 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.
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