6AW-81800-00 Aftermarket Yamaha Starter Motor | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Yamaha 6AW-Series High-Output Starter Motor - Replaces Part Number: 6AW-81800-00

New aftermarket high-output starter replacing Yamaha 6AW-81800-00 for large V8 and XTO offshore outboards. It uses a 13-tooth drive and is supplied as a complete starter and solenoid assembly.

⚙️ Key Features

• 12-volt marine starting system

• 13-tooth starter pinion

• Heavy-duty gear-reduction construction

• Designed for high-compression Yamaha V8/XTO outboards

• Integrated high-current solenoid

• 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 6AW-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:

• 6AW-81800-02 / 6AW-81800-01 → Later Yamaha service revisions associated with 6AW-81800-00

OEM / Related Numbers:

• 6AW-81800-00

• 6AW-81800-01

• 6AW-81800-02

Aftermarket / Verified Equivalents:

• Sierra: 18-55507

• ARCO: 3451

• Aftermarket Yamaha 6AW high-output starter

🚤 Compatibility

Commonly used on:

• Yamaha large V8 and XTO offshore outboard starting systems

Typically suits:

• Engine / Component models:

• F300 and LF300 applications using the 6AW starter family

• F350 and LF350, principally 2007-2019

• F425 XTO, principally 2018-2022 where 6AW is specified

• F450 XTO applications using the same starter reference

• HP Range: 300HP - 450HP

• Year Range: Principally 2007 onward; model and serial dependent

• Component Identification: Confirm the 6AW OEM number and 13-tooth drive; exact rotation and electrical revisions should be matched to the removed unit.

🔌 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