Aftermarket Mercury 18HP 2-Cylinder International (0N001590 & Up) Service Kit | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Mercury 18 HP International Two-Cylinder Two-Stroke Service Kit - Kit Reference: Application-matched Japanese 0N kit

Comprehensive aftermarket routine-maintenance kit assembled for 18 HP Japanese-built twin-cylinder carburetted two-stroke outboard applications. It combines the ignition, cooling, filtration and drain-sealing components listed below so the main scheduled-service items can be renewed together.

⚙️ Key Features

Kit contents:

• 2 × NGK spark plug - Part Number: BR7HS-10

• 1 × Thermostat - Part Number: 804540 (Tohatsu 345-01030-0 / 3H6010300M)

• 1 × Thermostat gasket - Part Number: 27-853702005

• 2 × Gearcase drain-plug seal - Part Number: 12-191833

• 1 × Water-pump impeller - Part Number: 47-8M0214944 (supersedes 47-8M0135803 and 47-803748; Tohatsu 334-65021-0 related)

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• Mercury/Quicksilver hyphenated and compact-number formats identify the same listed component

OEM / Related Numbers:

• BR7HS-10

• 804540

• 27-853702005

• 12-191833

• 47-8M0214944

Aftermarket / Verified Equivalents:

• Recmar, Sierra and Outboard Spares component-level replacements are available where the listed OEM reference is cross-matched

🚤 Compatibility

Commonly used on:

• Mercury/Mariner 18 HP Japanese-built International two-stroke outboards

Typically suits:

• HP Range: 18 HP

• Engine Type: Japanese-built twin-cylinder carburetted two-stroke outboard

• Year / Serial Range: Serial 0N001590 and above

• Identification: Confirm the complete engine model and serial number before ordering, particularly where shaft length, gear ratio or gearcase family changes the water-pump components.

🔌 Function

Provides the principal routine-service components used to maintain correct ignition, fuel delivery, cooling-water flow and fluid sealing. Renewing these items at the proper service interval helps support reliable starting, stable running, normal operating temperature and protection against contaminated oil or water-pump failure.

Common signs service is required:

• Hard starting, misfire, poor idle or reduced throttle response

• Restricted fuel flow, dirty filters or fuel starvation under load

• Weak or intermittent tell-tale flow, rising temperature or an overheat warning

• Cracked, hardened or missing impeller vanes

• Oil or gear-lubricant leakage from deteriorated drain-plug seals

• Scheduled annual, 100-hour or storage-return maintenance interval reached

📦 Condition

• Brand-new aftermarket service kit

• Supplied as new replacement components

• Supplied in suitable retail or equivalent packaging