86976 Aftermarket Mercruiser Starter Motor | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Mercury / Mariner V6 Outboard Starter Motor - Part Number: 50-86976

New aftermarket 9-tooth counter-clockwise starter for early Mercury and Mariner V6 two-stroke outboards using the 135-tooth flywheel. The supplied MerCruiser branding is corrected: 50-86976 is an outboard starter reference rather than an inboard sterndrive starter.

⚙️ Key Features

• 12-volt marine electrical system

• Counter-clockwise rotation viewed from the drive end

• 9-tooth starter pinion

• Permanent-magnet direct-drive construction

• Matched to the applicable 135-tooth Mercury V6 flywheel

• Integrated starter solenoid

🧰 Assembly Contents

• 1 × Complete starter motor assembly - Part Number: 50-86976

• 1 × Integrated starter solenoid

• 1 × Installed 9-tooth pinion and overrunning clutch

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

• Mounting fasteners and battery leads are not included unless specified

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 50-898265013 → Later Mercury service starter associated with 50-856996T and 50-86976

• 50-856996T → Related later service reference for the 50-86976 application family

• 50-86976 → Earlier Mercury complete starter reference

OEM / Related Numbers:

• 50-86976

• 86976

• 50-856996T

• 50-898265013

• United Technologies 4838740-M030SM

• United Technologies SM48387

Aftermarket / Verified Equivalents:

• ARCO Marine: 5381X

• Sierra Marine: 18-5609 / 18-6825

• API Marine: MOT3009 / MOT3009N

• DB Electrical / J&N: 410-21061

• Recmar: REC86976

🚤 Compatibility

Commonly used on:

• Early Mercury and Mariner V6 two-stroke outboard starting systems with a 135-tooth flywheel

Typically suits:

• Mercury V200 - principally from 1978

• Mercury V-2000 - principally 1978-1988

• Mercury V225 - principally 1980-1981

• Mercury/Mariner 150HP, 175HP, 200HP and 225HP V6 applications only where the original starter is 50-86976, 50-856996T or 50-898265013

• HP Range: Principally 150-225 HP

• Engine Type: Carburetted V6 two-stroke outboard

• Year Range: Principally late 1970s-1980s; exact flywheel and starter number control fitment

• Serial / Model Identification: Confirm 12V, 9 teeth, counter-clockwise rotation and the 135-tooth flywheel. Do not use this starter on a MerCruiser sterndrive solely from the supplied title.

🔌 Function

The starter engages the V6 flywheel and supplies the torque required to crank the powerhead. Matching the 9-tooth drive to the correct flywheel is essential for smooth engagement and reliable disengagement.

Common signs of failure:

• No crank or intermittent crank with correct battery voltage

• Slow rotation or excessive current draw

• Pinion spins without engaging the flywheel

• Grinding or repeated kick-out caused by worn or mismatched teeth

• Worn brushes, damaged commutator or burnt solenoid contacts

• Water intrusion, corrosion or excessive armature-shaft movement

📦 Condition

• Brand-new aftermarket replacement starter motor

• New and unused

• Supplied in suitable manufacturer or equivalent protective packaging