If you have any concerns regarding the suitability of the item please ask before purchase.

THERMOSTAT KIT

THERMOSTAT , THERMOSTAT SEAL , THERMOSTAT GASKET

FOR

MERCURY / MARINER OUTBOARD

40 50 60 HP

F40 F50 F60

4 CYLINDER

Thermostat Kit for Mercury Mariner Outboard 40HP, 50HP & 60HP EFI 4-stroke engines.

This complete kit contains the essential components required when replacing the thermostat assembly, helping maintain correct engine operating temperature and cooling system efficiency.

Kit Contains

1 × Thermostat
1 × Thermostat Seal
1 × Thermostat Gasket

Replaces Part Number

Thermostat: 8M0117413
Thermostat Seal: 27-887978
Thermostat Gasket: 27-824853

Fitment

Mercury / Mariner Outboard Models

F40 EFI
F50 EFI
F60 EFI

Engine Type

4-Stroke
4 Cylinder
EFI Models

IMPORTANT

If the part looks the same as yours, it is not always the correct one for your outboard. Please double-check compatibility before ordering.

If you have any concerns regarding suitability, please contact us with your engine model and serial number and we will be happy to check compatibility for you.

Details

Complete thermostat replacement kit
Includes thermostat, seal & gasket
Helps maintain correct engine operating temperature
Suitable for Mercury & Mariner EFI outboards
High-quality aftermarket / OEM-spec components

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.

4 STROKE

EFI MODELS

Replaces Mercury part numbers :

Thermostat 8M0117413

Thermostat Seal : 27-887978

Thermosat gasket :27-824853

If the part looks the same like yours is not always the right one for your outboards so please double check.

40HP 50HP 60HP Thermostat Kit for Mercury Mariner Outboard F40 F50 F60 EFI 4 Stroke