191-2229 Aftermarket Onan Starter Motor MDKAU, MDKBH, MDKBW, MDKBJ | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Onan MDKAU/MDKBH/MDKBJ/MDKBW Starter Motor - Replaces Part Number: 191-2229

New aftermarket offset gear-reduction starter replacing Cummins Onan 191-2229 for specified marine generator sets. The assembly is a 12-volt clockwise starter with a 9-tooth drive.

⚙️ Key Features

• 12-volt electrical system

• Approximately 1.2kW output

• Clockwise rotation viewed from the drive end

• 9-tooth pinion

• Two-bolt offset 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 191-2229

• 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:

• 191-2229 (Cummins Onan OEM reference)

OEM / Related Numbers:

• 191-2229

• ND474

Aftermarket / Verified Equivalents:

• WAI: 18400N

• Aftermarket ND474 starter

• Recmar-compatible Onan 191-2229 starter

🚤 Compatibility

Commonly used on:

• Cummins Onan marine-generator starting systems

Typically suits:

• Engine / Generator models:

• MDKAU

• MDKBH

• MDKBJ

• MDKBW

• HP / Output Range: Generator-output dependent

• Year Range: Generator specification dependent

• Starter Identification: Confirm 12V, 9-tooth drive and two-bolt mounting nose.

🔌 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