50-893891T Aftermarket Mercruiser 10-Tooth CCW Starter Motor | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Mercury/Mariner 65-90HP two-stroke outboard starter motor - Part Number: 50-893891T

A 12-volt, ten-tooth, counter-clockwise starter for selected Mercury and Mariner carburetted two-stroke outboards. It is principally associated with 65 Jet, 75HP and 90HP three-cylinder engines, while the same replacement family also cross-references to earlier 60-90HP outboards.

This is an outboard starter rather than a MerCruiser inboard starter. Starter length and mounting must be checked because some earlier engines use physically longer assemblies despite sharing related electrical references.

⚙️ Key Features

• 12V marine outboard starter

• Ten-tooth pinion

• Counter-clockwise drive rotation

• Suitable for selected 65 Jet and 75-90HP two-stroke engines

• Complete motor and starter-drive assembly

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 50-893891T → Replaces the applicable 50-66015T1 starter family

OEM / Related Numbers:

• Mercury: 50-893891T

• Mercury: 50-57485

• Mercury: 50-60315

• Mercury: 50-65436

• Mercury: 50-66015

• Mercury: 50-66015T1

• Mercury: 50-66015-2

• Mercury: 50-88119

• Electrical reference: 5708N

Aftermarket / Verified Equivalents:

• Sierra: 18-5642

• ARCO Marine: 5375

• WAI: 5708N

• Recmar: REC50-893891T

🚤 Compatibility

Commonly used on:

• Mercury and Mariner carburetted two-stroke outboards

Typically suits:

• Engine models:

• Mercury 65 Jet three-cylinder

• Mercury/Mariner 75HP three-cylinder

• Mercury/Mariner 90HP three-cylinder

• Selected earlier Mercury 60HP, 65HP, 70HP, 75HP, 80HP, 85HP and 90HP engines using the same ten-tooth starter configuration

• HP Range: 60HP-90HP

• Engine Type: Carburetted two-stroke outboard, principally inline three-cylinder

• Year Range: Approximately 1972 onward across the related starter family; principal later applications extend into the 2000s

• Serial Guidance:

• 65 Jet: 0T980000-0T999999 and 1B000001 & Up

• 75/90HP: selected 0P325500 & Up, 0T980000-0T999999 and 1B000001 & Up

🔌 Function

The starter engages the flywheel and cranks the engine until the ignition system and fuel charge start combustion.

Common signs of failure:

• No crank when the start circuit is energised

• Slow cranking under compression

• Starter spins but the pinion does not engage

• Grinding or repeated pinion kick-out

• Intermittent operation from worn brushes or armature contacts

📦 Condition

• Brand-new aftermarket outboard starter motor

• Supplied as a complete ten-tooth counter-clockwise assembly

• Confirm starter length, serial number and mounting before installation