GHmarine thermostat kit front view illustrating complete replacement for Yamaha outboard cooling systems.
GHmarine thermostat kit side view highlighting compact design for in-hatch installation.
GHmarine thermostat housing gasket close-up for Yamaha engines.
GHmarine thermostat seal assembly emphasizes secure thermal sealing for Yamaha outboards.
GHmarine thermostat package display showing thermostat, gasket, and seal contents.
GHmarine thermostat kit interior components laid out for maintenance consideration.
GHmarine Yamaha outboard thermostat fitment confirms compatibility with 2-stroke models.
GHmarine thermostat kit front view illustrating complete replacement for Yamaha outboard cooling systems.
GHmarine thermostat kit side view highlighting compact design for in-hatch installation.
GHmarine thermostat housing gasket close-up for Yamaha engines.
GHmarine thermostat seal assembly emphasizes secure thermal sealing for Yamaha outboards.
GHmarine thermostat package display showing thermostat, gasket, and seal contents.
GHmarine thermostat kit interior components laid out for maintenance consideration.
GHmarine Yamaha outboard thermostat fitment confirms compatibility with 2-stroke models.

GHmarine Thermostat Repair Kit for Yamaha 2-Stroke Outboards | 75–250 HP | 50°C

Overview Restore reliable cooling control with the GHmarine Thermostat Repair Kit, designed specifically for Yamaha 2-stroke outboards...
Vendor: GHmarine
Availability: In stock
£38.84
£38.84
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GHmarine thermostat kit front view illustrating complete replacement for Yamaha outboard cooling systems.

GHmarine Thermostat Repair Kit for Yamaha 2-Stroke Outboards | 75–250 HP | 50°C

£38.84
GHmarine thermostat kit front view illustrating complete replacement for Yamaha outboard cooling systems.
GHmarine thermostat kit side view highlighting compact design for in-hatch installation.
GHmarine thermostat housing gasket close-up for Yamaha engines.
GHmarine thermostat seal assembly emphasizes secure thermal sealing for Yamaha outboards.
GHmarine thermostat package display showing thermostat, gasket, and seal contents.
GHmarine thermostat kit interior components laid out for maintenance consideration.
GHmarine Yamaha outboard thermostat fitment confirms compatibility with 2-stroke models.

GHmarine Thermostat Repair Kit for Yamaha 2-Stroke Outboards | 75–250 HP | 50°C

£38.84
Description
Description
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Overview

Restore reliable cooling control with the GHmarine Thermostat Repair Kit, designed specifically for Yamaha 2-stroke outboards ranging from 75 to 250 HP. This all-in-one kit focuses on the core thermostat components and seals needed to maintain proper coolant flow. The included thermostat is rated at 122°F (50°C), providing a balanced temperature point that pairs well with a variety of operating conditions, from calm days on the water to more demanding outings.

Whether you’re performing routine maintenance or replacing worn parts, this kit offers a straightforward path to reestablishing a consistent cooling path. Because it consolidates essential pieces into one package, it can help streamline your repair workflow and reduce downtime during service or on-water emergencies.

What's Included

  • Thermostat 688-12411
  • Thermostat Housing Gasket 688-12414
  • Thermostat Seal 688-12412

Compatibility & Fit

The kit fits Yamaha 2-stroke models in the 75–250 HP range, including popular lines like Z150, Z175, and Z200. It’s designed to be a direct-replacement option that aligns with common Yamaha maintenance references and aftermarket equivalents.

Key Benefits & Use Scenarios

  • Comprehensive replacement: includes thermostat, gasket, and seal for a complete service path.
  • Standardized temperature rating: 122°F / 50°C to support typical engine cooling profiles.
  • Cross-compatibility: replaces several OEM and aftermarket part numbers to simplify sourcing.
  • Easier maintenance: components are organized for a straightforward swap, potentially reducing downtime.

Tips for Installation & Maintenance

Before starting, ensure the engine is cool and the ignition is off. Inspect mating surfaces and replace the housing gasket and seal with the included parts for a clean, secure seal. While performing the swap, verify alignment and seating of the thermostat to promote consistent coolant flow. If you’re unsure about any step, consult the engine service manual or a qualified technician.

FAQ

Q: Which Yamaha models are compatible with this thermostat repair kit?

A: Fits Yamaha 2-stroke engines from 75 to 250 HP, including Z150, Z175, and Z200.

Q: What parts are included in the package?

A: Thermostat 688-12411, thermostat housing gasket 688-12414, and thermostat seal 688-12412.

Shipping & Return
Shipping & Return
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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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