38890A1 55601A2 Mercury Starter Motor | Genuine Used Part

🔧 Product Description

Genuine Mercury Starter Motor - Part Numbers: 50-38890A1 / 50-55601A2

A genuine Mercury starter motor used on older Mercury 35HP, 40HP and 50HP two-stroke outboards. This 12-volt, 9-tooth, counter-clockwise starter family is commonly used on classic Mercury outboard electric-start systems from the mid-1960s through early-1980s applications.

⚙️ Key Features

• Genuine Mercury starter motor

• Correct OEM references 50-38890A1 and 50-55601A2

• 12-volt starter motor

• 9-tooth drive gear

• Used on older Mercury 35HP, 40HP and 50HP two-stroke outboards

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 50-55601A2 later Mercury starter motor reference

• 50-38890A1 related Mercury starter motor reference

• 50-38890 earlier Mercury starter reference

• 50-37345 related earlier Mercury starter reference

• 50-32411 related earlier Mercury starter reference

• 50-32403 related earlier Mercury starter reference

• 50-30829 earlier Mercury starter reference

OEM / Related Numbers:

• 50-55601A2

• 55601A2

• 50-55601

• 55601

• 50-55801A

• 55801A

• 50-38890A1

• 38890A1

• 50-38890

• 38890

• 50-37345

• 37345

• 50-32411

• 32411

• 50-32403

• 32403

• 50-30829

• 30829

Aftermarket / Verified Equivalents:

• Sierra: 18-5604 style replacement

• ARCO: 5366 style replacement

• DB Electrical: 410-21000

• WAI / MES style replacement: 5400N

• Aftermarket reference: 50-30829 / 50-38890A1 / 50-55601A2 starter replacement

🚤 Compatibility

Commonly used on:

• Mercury two-stroke electric-start outboards

• Older 9-tooth Mercury starter systems used on 35HP, 40HP and 50HP engines

Typically suits:

• Engine models:

• Mercury 35HP two-stroke - approximately 1965-1969

• Mercury 40HP two-stroke - approximately 1970-1977

• Mercury 40E two-stroke - approximately 1978-1983

• Mercury 40EH two-stroke - approximately 1979-1983

• Mercury 40EL two-stroke - approximately 1978-1983

• Mercury 40ELH two-stroke - approximately 1979-1983

• Mercury 50HP two-stroke - approximately 1965-1975

• Mercury 50HP classic electric-start applications using 50-38890A1 / 50-55601A2 starter systems

• HP Range: commonly 35HP - 50HP

• Engine Type: Mercury two-stroke outboard

• Year Range: approximately 1965-1983

• Starter Type: 12V, 9-tooth, counter-clockwise rotation

🔌 Function

The starter motor converts battery power into cranking force and engages the flywheel ring gear so the engine can start from the electric-start circuit.

Common signs of failure:

• Starter clicks but does not crank

• Slow cranking with a charged battery

• Starter spins without engaging the flywheel

• Grinding noise during starter engagement

• Starter motor overheating

• Worn brushes, bushings, armature or drive gear

📦 Condition

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated