Aftermarket Mercury 25HP Marathon, Super15, SeaPro 2-Cylinder Service Kit | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Mercury 25 HP Marathon / Super 15 / SeaPro Two-Cylinder Service Kit - Kit Reference: Application-matched commercial two-cylinder kit

Comprehensive aftermarket routine-maintenance kit assembled for 15-25 HP Mercury/Mariner commercial-duty 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:

• 1 × Thermostat - Part Number: 14586

• 1 × Thermostat gasket - Part Number: 27-14318-3

• 1 × Fuel filter - Part Number: 35-87946Q3

• 1 × Fuel filter, 5/16 inch - Part Number: 816296Q2 (aftermarket Reco 40155)

• 1 × Water-pump repair kit - Part Number: 46-99157T2

• 2 × NGK spark plug - Part Number: BP8H-N-10

🔄 Supersession & Cross Reference

OEM Supersession Chain:

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

OEM / Related Numbers:

• 14586

• 27-14318-3

• 35-87946Q3

• 816296Q2

• 46-99157T2

• BP8H-N-10

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 25 HP Marathon, Super 15 and SeaPro twin-cylinder two-stroke outboards using the 46-99157T2 pump family

Typically suits:

• HP Range: 15-25 HP

• Engine Type: Mercury/Mariner commercial-duty twin-cylinder carburetted two-stroke outboard

• Year / Serial Range: Model/serial controlled; confirm commercial model designation and fuel-hose size

• 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