6BG-81800-00 Aftermarket Yamaha Starter Assembly | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Yamaha F25/F30/F40 Starter Motor - Replaces Part Number: 6BG-81800-00

New aftermarket Mitsubishi-pattern permanent-magnet gear-reduction starter replacing Yamaha 6BG-81800-00.

⚙️ Key Features

• 12-volt electrical system

• 1.0kW rated output

• Counter-clockwise rotation viewed from the drive end

• 9-tooth pinion

• Permanent-magnet gear-reduction construction

• 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 6BG-81800-00

• 1 × Integrated starter solenoid and shift mechanism

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

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

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

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 6BG-81800-00 (Yamaha OEM starter reference)

OEM / Related Numbers:

• 6BG-81800-00

• Mitsubishi M000TA5071

• M0TA5071

Aftermarket / Verified Equivalents:

• Sierra: 18-6964

• Arrowhead/J&N: 410-48368

• Aftermarket M000TA5071 starter

🚤 Compatibility

Commonly used on:

• Yamaha mid-range four-stroke outboard starting systems

Typically suits:

• Engine / Component models:

• F25 and T25, principally 2009-2018

• F30, principally 2014-2018

• F40, principally 2009-2018

• HP Range: 25HP - 40HP

• Year Range: Principally 2009 - 2018

• Component Identification: Confirm 12V, 1.0kW, 9 teeth and CCW rotation.

🔌 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 combustion begins. The overrunning clutch then protects the starter as engine speed rises.

Common signs of failure / service requirement:

• 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