3860764 Aftermarket Volvo Penta Starter Motor | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement GM Petrol Offset-Mount Marine Starter Motor - Replaces Part Number: 3860764

New aftermarket SAE J1171-style permanent-magnet gear-reduction starter replacing Volvo Penta 3860764 and related MerCruiser/OMC references. It uses a 12-volt, approximately 1.7kW clockwise motor with an 11-tooth pinion and staggered/offset two-bolt nose.

⚙️ Key Features

• 12-volt electrical system

• Approximately 1.7kW output

• Clockwise rotation viewed from the drive end

• 11-tooth pinion

• Two-bolt staggered/offset PMGR marine mounting

• 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 3860764

• 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:

• 3885317 / later 863007A1 service family → Cross-references earlier 3860764/3856004/3854751 numbers

OEM / Related Numbers:

• 3860764

• 3856004

• 3854751

• 3853982

• 3587625

• 3885317

• MerCruiser 50-812604A2

• 50-806964A2

• 50-806964A3

• 50-863007A1

• OMC 984456

Aftermarket / Verified Equivalents:

• Sierra: 18-5913 / 18-5919

• ARCO: 30460 family

• Recmar: REC3860764

🚤 Compatibility

Commonly used on:

• MerCruiser, Volvo Penta and OMC GM-block marine petrol starting systems

Typically suits:

• Engine / Generator models:

• 3.0L inline-four

• 4.3L V6

• 5.0L and 5.7L small-block V8

• 7.4L, 8.1L and 8.2L big-block applications using the offset-mount starter

• HP / Output Range: Engine-rating dependent

• Year Range: Application and flywheel/mounting-pattern dependent

• Starter Identification: Confirm 14-inch flywheel, 11-tooth pinion and staggered offset bolt pattern.

🔌 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

Also supersedes Volvo part numbers 3850525 and 3853817