6H3-81800-11 Aftermarket Yamaha Starter Motor | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Yamaha 60-70HP Three-Cylinder Starter Motor - Part Number: 6H3-81800-11

New aftermarket Hitachi-pattern direct-drive starter for Yamaha three-cylinder 60HP and 70HP two-stroke outboards. The assembly uses a 12-volt, 9-tooth, counter-clockwise drive configuration and replaces the earlier 6H3-81800-10 starter.

⚙️ Key Features

• 12-volt marine electrical system

• Counter-clockwise rotation viewed from the drive end

• 9-tooth starter pinion

• Hitachi-pattern permanent-magnet direct-drive construction

• Integrated marine starter solenoid

• Correct 6H3 mounting pattern for applicable three-cylinder powerheads

🧰 Assembly Contents

• 1 × Complete starter motor assembly - Part Number: 6H3-81800-11

• 1 × Integrated starter solenoid

• 1 × Installed 9-tooth pinion and overrunning clutch

• 1 × Installed armature, field-magnet, brush-holder and starter housing

• External cables and mounting fasteners are transferred or renewed separately

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 6H3-81800-11 → Supersedes 6H3-81800-10

• 6H3-81800-10 → Earlier complete starter reference

OEM / Related Numbers:

• 6H3-81800-11

• 6H3-81800-11-00

• 6H3-81800-10

• 6H3-81800-10-00

• Hitachi S108-97A

Aftermarket / Verified Equivalents:

• Sierra Marine: 18-6411

• ARCO Marine: 3422

• API Marine: MOT5001N-AM

• Recmar: REC6H3-81800-11

• Hitachi: S108-97A

🚤 Compatibility

Commonly used on:

• Yamaha three-cylinder carburetted two-stroke outboard starting systems

Typically suits:

• 60F, 60FET, 60FETL and 60TLR model families specifying 6H3-81800-11

• 70B, 70BETO and related 70HP model families specifying the 6H3 starter

• C60 and E60 market variants only where the engine parts catalogue lists 6H3-81800-10 or 6H3-81800-11

• HP Range: 60-70 HP

• Engine Type: Inline three-cylinder carburetted two-stroke outboard

• Year Range: Approximately 1984-2019, depending on model code and market

• Serial / Model Identification: Confirm the complete Yamaha model code, 9-tooth counter-clockwise drive, mounting bracket and original 6H3 starter number.

🔌 Function

The motor supplies the cranking torque required to rotate the three-cylinder powerhead during starting. Its pinion must match the flywheel ring gear and disengage immediately after the engine fires.

Common signs of failure:

• No crank despite correct battery voltage and start-signal voltage

• Starter turns slowly or draws excessive current

• Solenoid engages but the motor does not spin

• Pinion fails to engage or clashes with the flywheel

• Intermittent operation from worn brushes or solenoid contacts

• Corrosion, water ingress, burnt windings or excessive shaft play

📦 Condition

• Brand-new aftermarket replacement starter motor

• New and unused

• Supplied in suitable manufacturer or equivalent protective packaging