PRODUCT DETAILS
4HP 5HP 6HP Thermostat (50°C) for Suzuki Outboard DF4 DF5 DF6 2002 & Up – Replaces 17670-91J00
Description:
Thermostat – 50°C for Suzuki Outboards
Suitable for 4-stroke Suzuki 4HP, 5HP, and 6HP outboards
Will fit:
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DF4 / DF5 / DF6
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Years: 2002 & Up
Replaces OEM Part Numbers:
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17670-91J00
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17670-91J01
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17670-91J02
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17670-91J02-000
(OEM numbers used for reference only)
Key Details:
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Marine-grade quality aftermarket thermostat
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Suitable for both freshwater and saltwater use
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Maintains correct engine temperature for peak performance
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Easy installation – direct fit replacement
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Workshop tested aftermarket & OEM parts
Why Buy from SSI Marine?
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✅ Fast U.K. dispatch (same-day before 1 PM)
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✅ In-stock in our Leigh, Manchester workshop
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✅ Expert technical support available
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✅ Trusted marine supplier
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✅ VAT receipts available on request
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✅ Secure checkout with credit/debit card support
⚠️ Note: It is the buyer’s responsibility to confirm compatibility with their engine model and serial number. If in doubt, please message us before purchasing.
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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