PRODUCT DETAILS
Power Head / Base Gasket for Mariner 9.9 HP & 15 HP Outboards
Premium-quality aftermarket power head base gasket for selected Mariner 9.9 HP and 15 HP 2-stroke outboards.
⚠️ YAMAHA-MANUFACTURED MARINER ENGINES ONLY
This gasket is specifically for the Japanese Mariner outboards manufactured by Yamaha.
IT WILL NOT FIT MARINER ENGINES MANUFACTURED BY MERCURY.
Please check your engine model and identification before ordering.
Fits Mariner Outboards
9.9 HP – 2 Stroke
- 9.9C
- Selected 1979–1986 models
- Japanese / Yamaha-manufactured Mariner only
15 HP – 2 Stroke
- 15C
- 15K
- W15
- Selected 1979–1986 models
- Japanese / Yamaha-manufactured Mariner only
Replaces Mariner Part Numbers
- 27-96602M
- 96602M
- 27-96602
- 96602
- 83901M
OEM part numbers are used for identification and reference purposes only.
Product Features
- Power head / base gasket
- For selected Mariner outboards
- 9.9 HP & 15 HP
- 2-stroke applications
- Fits selected 9.9C / 15C / 15K / W15
- Selected 1979–1986 applications
- Japanese Yamaha-manufactured Mariner engines only
- Marine-grade aftermarket replacement
- Manufactured to OEM specifications
- Designed for accurate fitment and reliable sealing
- New replacement part
⚠️ IMPORTANT – YAMAHA-MADE MARINER ONLY
Mariner sold outboards manufactured by different manufacturers.
This gasket is specifically for the:
MARINER 9.9 HP / 15 HP – JAPANESE MODELS MANUFACTURED BY YAMAHA
WILL NOT FIT
Mariner engines manufactured by Mercury.
Do not order this gasket simply because your engine is a Mariner 9.9 HP or 15 HP.
The manufacturer, model and engine identification must be checked.
Important – Please Check Compatibility
Before purchasing, please check:
- Engine is a Japanese Yamaha-manufactured Mariner
- Engine horsepower
- Engine model
- Model year
- Original gasket
- Original Mariner part number
For the safest identification, your existing gasket should correspond with 27-96602M / 96602M.
If the gasket looks the same as yours, this does not always mean it is the correct gasket for your outboard.
If you are unsure whether your Mariner was manufactured by Yamaha or Mercury, please send us a photograph of your engine identification / serial-number plate before ordering.
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
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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