THERMOSTAT & HOUSING KIT – GENUINE QUIKSILVER
Fits Mercury / Mariner outboards 50HP & 60HP 2‑Stroke (3 Cylinder / 3 Carburettor Models) including Bigfoot variants.

Includes:

Aluminium Thermostat Housing
Housing Gasket
Thermostat & Seat
Rubber Seal
Cable Tie
Water Telltale Outlet Pipe

Genuine Part Number: 850055A2
Mercury/Mariner engine block latest models without poppet valve

This Kit is Designed to Fit:

40HP 3‑cyl 2‑Stroke (USA Serial 0G531301 and up / BEL 9855139 and up)
50HP 3‑cyl 2‑Stroke (USA Serial 0G590000 and up / BEL 9973100 and up) 55HP 3‑cyl 2‑Stroke (USA 0G590000 & up / BEL 9973100 & up)
60HP 3‑cyl 2‑Stroke (USA 0G590000 & up / BEL 9973100 & up)

Why Choose SSI Marine?

Workshop‑tested aftermarket & OEM parts
Fast dispatch from our UK warehouse
Tracked 24‑hour UK delivery
Expert technical support available
UK stock – same‑day dispatch if ordered before 1 PM (Mon–Fri)
Collection available from our Leigh (Manchester) unit

⚠️ Important: It is the buyer’s responsibility to confirm compatibility with your engine model and serial number before purchasing. If in doubt, contact us and our team will be happy to help.

50HP–60HP Thermostat & Housing Kit for Mercury/Mariner Outboard – Quicksilver 850055A2