PRODUCT DETAILS
Cylinder Head Gasket for Mariner Outboard (Yamaha-Made) 9.9HP 15HP 2-Stroke (1988-1996) – Aftermarket Replacement
Ensure a perfect seal and optimal performance with this high-quality aftermarket cylinder head gasket, designed for Mariner outboards (Japanese models made by Yamaha). This gasket is a direct replacement for select 9.9HP and 15HP 2-stroke engines and is not compatible with Mariner outboards manufactured by Mercury.
Compatible Mariner Outboard Models:
✔ 9.9HP Models: 9.9C (1988-1996)
✔ 15HP Models: 15C-K (1988-1996)
⚠ Not for Mariner outboards made by Mercury
Replaces Mariner OEM Part Numbers:
🔹 18937
🔹 18937M
🔹 27-18937
🔹 27-18937M
Key Features & Benefits:
✅ Precision Fit for Yamaha-Made Mariner 9.9HP & 15HP 2-Stroke Engines
✅ High-Quality Aftermarket Replacement – Cost-effective alternative to OEM parts
✅ Durable Marine-Grade Construction – Built to withstand tough marine conditions
✅ Ensures Proper Engine Sealing – Prevents leaks and maintains compression
✅ Easy Installation – Direct replacement for OEM gasket
Why Buy From SSI Marine?
✔ Premium Marine Parts at Competitive Prices
✔ Fast & Secure UK Shipping – All Parts In Stock & Ready to Ship
✔ Expert Support – Need help? Contact us for compatibility assistance
✔ Trusted UK Seller – Collection Available from Leigh, Manchester (Mon–Fri, 9 AM–5 PM)
⚠️ If the part looks the same as yours, it does not always mean it is the correct fit. Please double-check compatibility before purchase.
Order Now for a Reliable Cylinder Head Gasket to Keep Your Mariner Outboard Running at Its Best! 🚤💨
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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