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

🚤 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

🔄 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

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated