6L2-81800-20 Aftermarket Mercruiser/Yamaha E10-B10 Starter Motor | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Yamaha / Tohatsu / Mercury-Mariner 9.9-25HP Starter Motor - Part Number: 6L2-81800-20

New aftermarket 12-volt, 10-tooth counter-clockwise starter used across the Yamaha 6L2 small-outboard platform and directly related Tohatsu, Nissan, Mercury/Mariner and Johnson/Evinrude applications. The E10/B10 wording in the supplied title identifies a shared small-outboard application rather than a MerCruiser sterndrive starter.

⚙️ Key Features

• 12-volt marine electrical system

• Counter-clockwise rotation viewed from the drive end

• 10-tooth starter pinion

• Permanent-magnet direct-drive construction

• Two-bolt small-outboard mounting pattern

• Large verified OEM and aftermarket interchange family

🧰 Assembly Contents

• 1 × Complete starter motor assembly - Part Number: 6L2-81800-20

• 1 × Integrated starter solenoid

• 1 × Installed 10-tooth pinion and overrunning clutch

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

• External cables, relays and mounting bolts are not included unless specified

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 6L2-81800-20 → Later Yamaha service reference associated with 6L2-81800-11 and 6L2-81800-10

• 6L2-81800-11 / 6L2-81800-10 → Earlier Yamaha starter references

OEM / Related Numbers:

• 6L2-81800-20

• 6L2-81800-11

• 6L2-81800-10

• 682-81800-10

• Mercury / Mariner 50-803835T02

• Mercury / Mariner 803835T02

• Tohatsu / Nissan 350-76010-0M

• Tohatsu / Nissan 3AA-76010-0M

• Tohatsu B29A90500 / B29A90500A

• Johnson / Evinrude 5040343

• Hitachi S106-07B / S106-07E / S106-07F

• Hitachi S106-12 / S106-12A / S106-12B

Aftermarket / Verified Equivalents:

• Sierra Marine: 18-6420

• ARCO Marine: 3421

• API Marine: MOT5013N

• Marine Spare Parts: PH130-0061

• WAI: 18301N

• J&N: 410-44084

• Arrowhead: SHI0133

• Recmar: REC6L2-81800-20

🚤 Compatibility

Commonly used on:

• Shared Yamaha/Tohatsu-manufactured small-outboard starting systems

Typically suits:

• Yamaha 9.9D and 15D model families - principally 1984-1997

• Yamaha 20D model families - principally 1993-2016

• Yamaha 25N model families - principally 1988-2016

• Tohatsu/Nissan small two-stroke engines whose starter is 350-76010-0M or 3AA-76010-0M

• Mercury/Mariner applications whose parts catalogue specifies 50-803835T02

• Johnson/Evinrude applications whose parts catalogue specifies 5040343

• HP Range: Approximately 9.9-25 HP

• Engine Type: Two-cylinder carburetted two-stroke outboard

• Year Range: Approximately 1984-2016, controlled by brand and model code

• Serial / Model Identification: Confirm the 10-tooth counter-clockwise starter, two-bolt mounting arrangement and one of the listed OEM references. This is not an inboard MerCruiser starter.

🔌 Function

The starter turns the small-outboard flywheel through the 10-tooth pinion until the engine starts. Correct direction and pinion geometry are essential because similar-looking starters are available with different tooth counts.

Common signs of failure:

• Starter solenoid clicks without motor rotation

• Slow cranking or excessive battery-cable heating

• Pinion fails to rise or engage the flywheel

• Grinding from incorrect tooth count or worn flywheel teeth

• Intermittent operation from worn brushes or internal corrosion

• Overheating, burnt windings or loose internal bushings

📦 Condition

• Brand-new aftermarket replacement starter motor

• New and unused

• Supplied in suitable manufacturer or equivalent protective packaging