1. Technical Specifications

2. Key Features

• High Cranking Torque: High-purity copper windings and heavy-duty field coils deliver maximum rotational torque, ensuring rapid engine starting even under low ambient temperatures and high cylinder compression.

• Marine Corrosion Protection: Sealed joints with O-rings and an epoxy-coated exterior shell protect internal components against salt spray, marine humidity, and water splashing.

• Hardened Pinion Gear: The 9-tooth Bendix gear is heat-treated and case-hardened to resist impact chipping and ensure smooth, reliable engagement with the engine flywheel ring gear.

• Direct OEM Fitment: Flange mounting bolt hole spacing and electrical terminal studs match factory specifications exactly for straightforward drop-in replacement.

3. Compatible Models

Primarily compatible with Yamaha 2-stroke 75HP to 90HP 3-cylinder outboard engines:

• Yamaha 75 HP 2-Stroke Series: 75A, 75C, P75, C75 models

• Yamaha 80 HP 2-Stroke Series: 80A series

• Yamaha 85 HP 2-Stroke Series: 85A, C85 models

• Yamaha 90 HP 2-Stroke Series: 90A, 90TLR, 90TJR, C90, and 90 HP 3-cylinder powerheads

4. Aftermarket & Brand Compatibility

• OEM Brand Fitment:

• Yamaha Marine: Designed for Yamaha 75HP through 90HP 2-stroke outboard starting systems.

• PREMARINE Brand Aftermarket Replacement:

• PREMARINE Quality Standard: PREMARINE specializes in high-reliability marine electrical and starting system components. This starter motor is built with premium copper-graphite brush assemblies, heavy-duty armatures, and reinforced Bendix drive gears.

• Direct OEM-Level Performance: Cranking torque, amp-draw efficiency, and salt-fog durability meet or exceed original OEM standards, making it the premier cost-effective choice for marine repair workshops, maintenance overhauls, and complete starter replacements.

5. Common Symptoms & Troubleshooting

• Starter Fails to Turn / Only Solenoid Click Heard:

• Cause: Worn-out carbon brushes, burnt internal armature coils, or corroded primary power terminals.

• Troubleshooting: Verify that 12V battery voltage reaches the starter positive terminal during key-turn. If voltage is present and grounding is clean, replace the starter assembly.

• Starter Spins Freely at High Speed but Engine Does Not Crank:

• Cause: Slipping internal Bendix one-way clutch or a sticking spiral spline preventing the pinion gear from extending into the flywheel.

• Troubleshooting: Remove the starter and inspect the pinion mechanism. If the gear extends but slips freely under resistance, replace the starter assembly.

• Sluggish Cranking / Insufficient Cranking Speed:

• Cause: Shorted armature windings, seized drive bearings, or degraded field magnets causing excessive current draw and low rotational power.

• Troubleshooting: After confirming battery health, check the rotational resistance of the starter shaft by hand. If rough, tight, or producing an electrical burning odor, install a new starter motor.

OEM Part Numbers

Compatible OEM references include:

688-81800-12

688-81800-12-00

688-81800-11

688-81800-10

Compatible Engine Models

This Starter Motor Complete Assembly is primarily designed for:

2-Stroke 75/80/85/90HP

If you are unsure about compatibility, please provide your engine model number or identification plate for verification before ordering.

Applications

This Starter Motor Complete Assembly is commonly used for:

Outboard engine repair

Engine rebuilding projects

Marine maintenance workshops

Boat fleet maintenance

Commercial fishing vessels

Recreational boats

Marine spare parts distribution