3853945 Aftermarket Volvo Penta Power Trim Motor | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket OMC Cobra / Volvo Penta Power Trim Motor - Part Number: 3853945

A 12-volt reversible, two-wire replacement motor for the three-bolt OMC Cobra and Volvo Penta hydraulic trim-pump system. It restores electrical drive to the pump used to raise, lower and trim the sterndrive and is dimensionally matched to the 3853945 / 986280 motor family.

⚙️ Key Features

• 12 V reversible DC trim motor

• Two-wire electrical connection and three-bolt pump mounting

• Approximately 7.9 mm output shaft

• Motor-only replacement for compatible hydraulic pump assemblies

• Marine-duty replacement for corroded, seized or electrically failed original motors

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 3853945 → Volvo Penta service reference corresponding with OMC 0986280 / 986280

• 0986280 / 986280 → Earlier OMC Cobra motor reference

OEM / Related Numbers:

• 3853945

• 03853945

• 0986280

• 986280

• PT304

• PT304NM-3

• 18-6779

• 6245

• TRM0030

• 430-22010

• 10812

• 10812N

Aftermarket / Verified Equivalents:

• Recmar: REC3853945

• Sierra Marine: 18-6779

• ARCO / Pro Marine: 6245

• API Marine: PT304 / PT304NM-3

• Arrowhead / DB Electrical / J&N: TRM0030 / 430-22010

• EMP: 4-6779

• Lester / WAI: 10812 / 10812N

🚤 Compatibility

Commonly used on:

• OMC Cobra and King Cobra sterndrive trim pumps

• Volvo Penta SX, DP, DPS and DPX installations using motor 3853945 or 986280

Typically suits:

• Engine / drive models:

• OMC Cobra models using the two-wire, three-bolt motor, including 1990 Cobra applications

• OMC King Cobra trim systems catalogued with 986280 / 3853945

• Volvo Penta petrol sterndrive packages from approximately 3.0 L through 8.2 L where 3853945 is specified

• HP Range: Sterndrive application; approximately 115-500 HP depending on engine package

• Engine / Drive Type: 12 V hydraulic power-trim pump for OMC Cobra / Volvo Penta sterndrives

• Year Range: Approximately 1989-1998 for the principal Cobra/early Volvo applications

• Serial / Identification Range: No universal serial block covers every pump. Confirm the two-wire connector, three-bolt mounting pattern and original motor number before ordering.

🔌 Function

Drives the hydraulic gear pump in both directions so the sterndrive can be raised, lowered and trimmed under operator command.

Common signs of failure or replacement requirement:

• Trim relays click but the motor does not run

• Slow or intermittent raising and lowering

• Operation in one direction only after wiring and relays test correctly

• Excessive current draw, blown fuse or overheating

• Corrosion, water entry, brush wear or abnormal motor noise

📦 Condition

• Brand-new aftermarket replacement part

• Supplied as a new replacement component

• Supplied in suitable retail or equivalent packaging