Aftermarket Mercury 100HP 3-Cylinder Service Kit | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Mercury 100 HP Three-Cylinder Two-Stroke Service Kit - Kit Reference: Application-matched three-cylinder service kit

Comprehensive aftermarket routine-maintenance kit assembled for 100 HP Mercury/Mariner three-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. This listing is intentionally not extended to Mercury 100 HP four-cylinder engines.

⚙️ Key Features

Kit contents:

• 3 × Spark plug - Part Number: NGK/Champion application-matched plug (verify against the engine decal because the supplier listing spans all three-cylinder serial groups)

• 1 × Water-pump repair kit - Part Number: 817275A8 / application-matched 817275-series kit (gearcase-dependent)

• 1 × Thermostat - Part Number: application-matched Mercury three-cylinder thermostat (verify 14586 or 850055001 by serial range)

• 1 × Thermostat gasket - Part Number: application-matched

• 1 × Fuel filter - Part Number: application-matched Mercury inline filter

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

🔄 Supersession & Cross Reference

OEM Supersession Chain:

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

OEM / Related Numbers:

• NGK

• Champion application-matched plug

• 817275A8

• application-matched 817275-series kit

• application-matched Mercury three-cylinder thermostat

• application-matched

• application-matched Mercury inline filter

• 12-191833

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 100 HP three-cylinder two-stroke applications represented by the supplier's all-serial-range kit

Typically suits:

• HP Range: 100 HP

• Engine Type: Mercury/Mariner three-cylinder carburetted two-stroke outboard

• Year / Serial Range: All supplier-listed three-cylinder serial ranges; the exact engine serial and original component numbers must be checked because Mercury also produced 100 HP four-cylinder engines

• 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