PRODUCT DETAILS
Quality aftermarket thermostat and gasket kit suitable for Mercury and Mariner 2-stroke 2-cylinder outboard engines.
Designed to maintain correct engine operating temperature and cooling system efficiency, helping to prevent overheating and improve engine performance.
Replaces Part Numbers
Thermostat
- 14586
- 8M0117413
- 8M0223832
Gasket
- 27-19205002
- 27-8M0204714
Fitment
Suitable for Mercury and Mariner 2-Stroke 2-Cylinder Outboards:
- 6HP
- 8HP
- 9.9HP
- 10HP
- 15HP
Important: Will not fit older Mariner models manufactured by Yamaha (Japanese-built models).
IMPORTANT
Please check your engine model and serial number before purchasing. If you are unsure of compatibility, send us your engine details and our team will gladly confirm the correct parts for your outboard.
Details
- Thermostat and gasket included
- Premium aftermarket replacement parts
- Manufactured to OEM specifications
- Helps maintain correct engine operating temperature
- Direct replacement for original Mercury components
- Ideal for routine maintenance and repairs
Why Buy from SSI Marine
- Workshop-tested aftermarket & OEM-spec parts
- Fast UK dispatch (same-day before 1 PM Mon–Fri)
- Tracked 24-hour UK delivery
- UK stock – collection available from Leigh (Manchester)
- Technical support available
Buyer Responsibility
Please confirm compatibility with your engine model and serial number before purchase. If unsure, contact us — our technical team will be happy to help.
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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