Thermostat & Gasket for Mercury / Mariner 15HP 4-Stroke Carb Outboard (2-Cylinder)

Description:
High-quality aftermarket thermostat and gasket set suitable for Mercury and Mariner 15HP 4-stroke carburetted outboard engines (2-cylinder models). Designed to maintain optimal engine temperature and ensure reliable cooling system performance.

Fitment – Will Fit the Following Mercury / Mariner Models:
For 15 HP Mercury and Mariner 4-stroke carburetted outboards with 2 cylinders, including the following serial number ranges:

OG590000 thru OG760299
OG760300 thru 1B226999
OP075166 thru OP400999
OP401000 and UP
1B227000 thru 1B727495
9973100 thru OP016999

Replaces OEM Part Numbers:
Thermostat: 75692
Gasket: 27-814658
(Original part numbers used for reference only — this is a compatible, marine-grade aftermarket replacement.)

Key Features:

Compatible with Mercury and Mariner outboards
Marine-grade materials, corrosion-resistant
Reliable thermostat function for proper cooling
Suitable for both saltwater and freshwater use
Direct replacement – no modifications needed

Why Buy from SSI Marine?

UK-based stock for fast delivery
Tracked 24-hour dispatch (orders before 1 PM)
Trusted marine parts supplier
Expert support if you’re unsure about fitment
VAT invoice available on request

Please Note:
If the part looks the same as yours, it is not always the correct one. Please double-check your engine model and serial number. Contact us if you’re unsure — we’re happy to help.

Thermostat & Gasket for Mercury Mariner 15HP 4-Stroke Carb Outboard (2-Cylinder)