50-8M0166297 Aftermarket Mercruiser Starter Motor 13-Tooth CCW | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Mercury 75-115HP EFI four-stroke outboard starter motor - Part Number: 50-8M0166297

A 12-volt, thirteen-tooth, counter-clockwise starter for Mercury's 2.1L inline-four EFI four-stroke outboard family. It supersedes the 8M0137769, 8M0129166 and 8M0088064 starter references used on selected 75HP, 80HP, 90HP, 100HP and 115HP engines.

This is an outboard starter rather than a MerCruiser inboard starter. Earlier 1.7L Yamaha-derived engines and later V6/V8 four-strokes use different starters.

⚙️ Key Features

• 12V marine outboard starter

• Thirteen-tooth pinion

• Counter-clockwise drive rotation

• Designed for the 2.1L inline-four EFI platform

• Complete replacement motor, solenoid and drive assembly

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 50-8M0166297 → Supersedes 50-8M0137769

• 50-8M0137769 → Supersedes 50-8M0129166

• 50-8M0129166 → Supersedes 50-8M0088064

OEM / Related Numbers:

• Mercury: 50-8M0166297

• Mercury: 50-8M0137769

• Mercury: 50-8M0129166

• Mercury: 50-8M0088064

Aftermarket / Verified Equivalents:

• Recmar: REC50-8M0166297

🚤 Compatibility

Commonly used on:

• Mercury 2.1L inline-four EFI four-stroke outboards

Typically suits:

• Engine models:

• Mercury 75HP EFI four-stroke

• Mercury 80HP EFI four-stroke

• Mercury 90HP EFI four-stroke

• Mercury 100HP EFI four-stroke

• Mercury 115HP EFI four-stroke

• Applicable Command Thrust versions using the same starter reference

• HP Range: 75HP-115HP

• Engine Type: 2.1L inline four-cylinder EFI four-stroke outboard

• Year Range: Approximately 2014 onward

• Serial Range: Principally 2B095049 & Up, subject to the serialised parts catalogue

🔌 Function

The starter turns the flywheel and crankshaft until the EFI control system, fuel pressure and ignition establish engine operation.

Common signs of failure:

• No crank or only a relay click

• Slow cranking and low-voltage ECU faults

• Starter spins without engaging the flywheel

• Intermittent operation when hot

• Damaged thirteen-tooth pinion or ring gear

📦 Condition

• Brand-new aftermarket outboard starter motor

• Supplied as a complete thirteen-tooth counter-clockwise assembly

• Confirm the 2.1L engine family and serial number before installation