3840888 Aftermarket Volvo Penta Starter Motor | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Volvo Penta Small D1/MD-Series Starter Motor - Replaces Part Number: 3840888

New aftermarket compact starter replacing Volvo Penta 3840888 for MD2010/MD2020 and D1-13/D1-20 marine diesels. It is a 12-volt clockwise starter with an 8-tooth pinion.

⚙️ Key Features

• 12-volt electrical system

• Approximately 0.95-1.1kW output

• Clockwise rotation viewed from the drive end

• 8-tooth pinion

• Compact marine gear-reduction construction

• Complete new starter motor with integrated solenoid

• Marine or engine-grade corrosion-resistant construction

• Direct replacement only after voltage, rotation, tooth count and mounting pattern are confirmed

🧰 Kit / Assembly Contents

• 1 × Complete starter motor assembly - P/N 3840888

• 1 × Integrated starter solenoid and shift mechanism

• 1 × Installed pinion gear and overrunning clutch/Bendix assembly

• 1 × Installed armature, field-magnet/winding, brush holder and drive housing

• Mounting bolts, electrical cables and external relays are transferred or renewed separately unless supplied

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 23140597 → Current Volvo Penta service replacement associated with 3840888 and 3803904

OEM / Related Numbers:

• 3840888

• 3803904

• 23140597

Aftermarket / Verified Equivalents:

• Recmar: REC3840888

• Aftermarket Volvo Penta 8-tooth D1/MD starter

🚤 Compatibility

Commonly used on:

• Volvo Penta small marine diesel starting systems

Typically suits:

• Engine / Generator models:

• MD2010A/B/C/D

• MD2020A/B/C/D

• D1-13, D1-13B and D1-13F

• D1-20, D1-20B and D1-20F

• HP / Output Range: Approximately 10HP - 20HP

• Year Range: Principally 1990s onward; engine-serial dependent

• Starter Identification: Confirm 8 teeth; related 21302969 uses a 9-tooth pinion.

🔌 Function

The starter motor converts battery electrical energy into high-torque mechanical rotation to crank the engine. When the start circuit energises the solenoid, the pinion moves into the flywheel ring gear and the motor turns the crankshaft until the engine starts. The overrunning clutch then protects the starter as engine speed rises.

Common signs of failure / incorrect starter fitment:

• No-crank condition even though the battery and start-control circuit test correctly

• Solenoid clicks but the starter motor does not rotate

• Starter turns slowly, draws excessive current or overheats the battery cables

• Pinion spins without engaging the flywheel ring gear

• Grinding, clashing or repeated pinion kick-out during cranking

• Intermittent cranking caused by worn brushes, solenoid contacts or heat soak

• Corrosion, water intrusion, burnt windings or excessive shaft/bearing play

📦 Condition

• New aftermarket replacement starter motor

• Brand new

• Supplied in original or equivalent packaging