31100-90J01 Aftermarket Suzuki/Mercury DF90/DF100/DF115HP Outboard Starter Motor | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Suzuki 90J-Series Starter Motor - Replaces Part Number: 31100-90J01

New aftermarket Hitachi-pattern starter replacing Suzuki 31100-90J01 for first-generation DF90-DF140 four-stroke outboards and corresponding Suzuki-built Johnson applications.

⚙️ Key Features

• 12-volt electrical system

• Clockwise rotation viewed from the drive end

• 9-tooth pinion

• Hitachi gear-reduction construction

• Integrated marine starter solenoid

• 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 31100-90J01

• 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:

• 31100-90J01 → Supersedes/cross-references 31100-90J00

OEM / Related Numbers:

• 31100-90J00

• 31100-90J01

• Hitachi S114-837

• Hitachi S114-837A

• BRP 5033799

Aftermarket / Verified Equivalents:

• Sierra: 18-6831

• WAI: 19701N

• Recmar: REC31100-90J01

🚤 Compatibility

Commonly used on:

• Suzuki and Suzuki-built Johnson four-stroke outboard starting systems

Typically suits:

• Engine / Generator models:

• DF90, principally 2001-2008

• DF100 and DF115 pre-A-series

• DF100A and DF115A early applications using the 90J starter

• DF140 and early DF140A applications using the 90J starter

• HP / Output Range: 90HP - 140HP

• Year Range: Principally 2001-2015; model and serial dependent

• Starter Identification: Corrected brand classification: this is a Suzuki/BRP application, not a Mercury starter.

🔌 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