Thermostat & Exhaust Gasket Set for Yamaha 5HP 2-Stroke Outboard (6E3 Models)
Replaces Yamaha Part Numbers:
• Thermostat: 6E5-12411-02-00
• Exhaust Inner Cover Gasket: 6E3-41112-01
• Exhaust Outer Cover Gasket: 6E3-41114-01

This set includes the thermostat and both exhaust cover gaskets, designed to fit Yamaha 5HP 2-stroke outboard motors with serial numbers starting with 6E3. It's ideal for routine maintenance, cooling system repair, or a complete exhaust service.

Fits the following Yamaha outboards:
• 5HP 2-Stroke – Model 5C
• Only for engines with serial numbers starting with 6E3

Kit Includes:
• 1 x Thermostat
• 1 x Exhaust Inner Cover Gasket
• 1 x Exhaust Outer Cover Gasket

Please double check on the block if you have the '6E3' code on the casting.

If you have '6E0' then you have the 4hp block which is slightly different and needs different gaskets and thermostat.

The 4hp and 5hp blocks are interchangeable but internals are different

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.

For general guidance on choosing the correct outboard parts, visit our help page:
https://ssimarine.co.uk/blogs/news/blogs-news-how-to-order-the-correct-outboard-parts

5HP Thermostat & Exhaust Gasket Set for Yamaha 2-Stroke 6E3 Outboards – Replaces 6E5-12411-02