Aftermarket Mercury 9HP/15HP 2-Stroke USA, Marathon & SeaPro Service Kit | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Mercury 9HP/15HP Two-Stroke Service Kit - Kit Reference: USA / Marathon / SeaPro application package

A routine service package for USA-built Mercury and Mariner 9HP and 15HP two-stroke outboards, including Marathon and SeaPro variants. It does not suit the Japanese-built 0N-prefix engine family.

⚙️ Key Features

• Application-specific major service package

• Exact serial-range separation prevents mixing incompatible fuel filters, thermostats or gearcase pump parts

• Includes engine and gearcase drain-plug sealing components where applicable

• Includes the correct spark-plug type and quantity for the listed engine family

• Water-pump components match the stated standard, BigFoot or Command Thrust gearcase

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 46-42089A5 → Complete small-gearcase water-pump kit

• 35-87946Q3 → Current inline fuel-filter reference

OEM / Related Numbers:

• NGK BP8HS-15

• 12-191833

• 46-42089A5

• 35-87946Q3

• 14586

• 27-19205002

Aftermarket / Verified Equivalents:

• Sawley's Select application-specific aftermarket service package

Included Components:

• 2 × NGK BP8HS-15 spark plugs

• 2 × Gear-oil screw seals - 12-191833

• 1 × Water-pump kit - 46-42089A5

• 1 × Fuel filter - 35-87946Q3

• 1 × Thermostat - 14586

• 1 × Thermostat gasket - 27-19205002

🚤 Compatibility

Commonly used on:

• Mercury 9HP/15HP Two-Stroke outboard service applications

Typically suits:

• Engine models:

• Mercury 9HP two-stroke USA-built

• Mercury 15HP two-stroke USA-built

• Mercury/Mariner Marathon 9HP and 15HP

• Mercury/Mariner SeaPro 9HP and 15HP

• HP Range: 9HP-15HP

• Engine Type: Carburetted inline-two two-stroke outboard

• Year Range: Model-specific USA-built production

• Serial Range: USA-built serial families; excludes 0N-prefix Japanese engines

🔌 Function

The service kit groups the routine ignition, lubrication, fuel-system, cooling-system and gearcase consumables required for a major scheduled service. Replacing the listed components helps maintain reliable starting, correct operating temperature, clean fuel delivery, adequate cooling-water flow and secure engine and gearcase sealing.

Common signs service is due:

• Hard starting, rough idle or misfire from worn or fouled spark plugs

• Restricted fuel delivery or unstable engine speed from a contaminated filter

• Engine temperature runs high because the thermostat or water pump is deteriorated

• Low oil pressure, dirty engine oil or a restricted oil filter on four-stroke engines

• Water or lubricant leakage from reused drain-plug seals

• Reduced cooling-water discharge or damaged impeller vanes

📦 Condition

• Brand new aftermarket service kit

• New and unused components

• Supplied in manufacturer or equivalent protective packaging