Thermostat

for Yamaha outboard

2 stroke

9.9 , 15 , 25 , 30 , 40 , 55 HP

Will fit :

9.9D, 15D - 1985-1995

20hp, 25hp, 30hp twin cylinder, single carburettor

40hp twin cylinder, single carburettor

40hp twin cylinder, twin carburettor

50hp, 55hp, 60hp twin cylinder, twin carburettor

Replaces Yamaha part number : 6F5-12411-03, 6F5-12411-02

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

9.9HP 15HP 25HP 30HP 40HP 55HP 60HP Thermostat for Yamaha 2-Stroke Outboards – Replaces 6F5-12411-03