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:
We offer free shipping on all orders over £150 (excluded outboard engines, trailers)
Standard Shipping - £ 8.50
Orders are typically shipped within 1 business day of receipt of payment. We ship via Royal Mail Tracked 24 delivery service. Delivery times vary depending on the delivery destination.
For engines delivery cost please ask for a quote.
It is the buyer's responsibility to ensure that the correct shipping address is supplied.
All item(s) will be despatched to the registered address.
Tracking your order:
Once your order has been shipped, you will receive a tracking number via email. You can track your order online using the tracking number provided.
Returns:
We accept returns of unused and undamaged items within 30 days of purchase.
To return an item please contact us for a return authorisation number. Return shipping costs are the responsibility of the customer.
Refunds:
Refunds will be issued for the purchase price of the item, less shipping costs. Refunds will be issued in the same form of payment as the initial purchase.











