128170-77010 Aftermarket Yanmar GM Series Starter Motor | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Yanmar GM-Series Starter Motor - Replaces Part Number: 128170-77010

New aftermarket Hitachi-pattern starter replacing Yanmar 128170-77010 for compact GM-series marine diesels. It is a 12-volt, 1.0kW clockwise starter with a 9-tooth drive.

⚙️ Key Features

• 12-volt electrical system

• 1.0kW rated output

• Clockwise rotation viewed from the drive end

• 9-tooth pinion

• Compact direct-fit marine diesel starter

• Complete new starter motor with integrated solenoid

• Marine or engine-grade corrosion-resistant construction

• Direct replacement only after voltage, rotation, tooth count and mounting pattern are confirmed

🧰 Kit / Assembly Contents

• 1 × Complete starter motor assembly - P/N 128170-77010

• 1 × Integrated starter solenoid and shift mechanism

• 1 × Installed pinion gear and overrunning clutch/Bendix assembly

• 1 × Installed armature, field-magnet/winding, brush holder and drive housing

• Mounting bolts, electrical cables and external relays are transferred or renewed separately unless supplied

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 128170-77010 (Yanmar OEM reference)

OEM / Related Numbers:

• 128170-77010

• Hitachi S114-303

• Hitachi S114-303A

Aftermarket / Verified Equivalents:

• API Marine: PH140-0008

• Mallory: 9-15906

• Recmar: REC128170-77010

🚤 Compatibility

Commonly used on:

• Yanmar GM-series marine diesel starting systems

Typically suits:

• Engine / Generator models:

• 1GM, 1GM10, 1GM10C, 1GM10L and 1GM10VE

• 2GM, 2GMF and 2GM20

• 3GM, 3GMD, 3GMF and 3GM30

• HP / Output Range: Approximately 6HP - 30HP

• Year Range: Engine-model and production-year dependent

• Starter Identification: Confirm 12V, 9-tooth pinion and Hitachi S114-303 mounting pattern.

🔌 Function

The starter motor converts battery electrical energy into high-torque mechanical rotation to crank the engine. When the start circuit energises the solenoid, the pinion moves into the flywheel ring gear and the motor turns the crankshaft until the engine starts. The overrunning clutch then protects the starter as engine speed rises.

Common signs of failure / incorrect starter fitment:

• No-crank condition even though the battery and start-control circuit test correctly

• Solenoid clicks but the starter motor does not rotate

• Starter turns slowly, draws excessive current or overheats the battery cables

• Pinion spins without engaging the flywheel ring gear

• Grinding, clashing or repeated pinion kick-out during cranking

• Intermittent cranking caused by worn brushes, solenoid contacts or heat soak

• Corrosion, water intrusion, burnt windings or excessive shaft/bearing play

📦 Condition

• New aftermarket replacement starter motor

• Brand new

• Supplied in original or equivalent packaging