BZJUNZE Starter Motor 8200308 39MT 12V 11T Heavy-Duty 7.3 kW Replacement for Diesel Engines

The BZJUNZE 8200308 39MT is a heavy-duty 12V, 11-tooth starter motor engineered to replace OEM starters on Caterpillar, Cummins, Detroit Diesel and major heavy-truck engines.

This high-torque starter is designed for demanding diesel applications where dependable cold starts and long service life matter. Built with a 7.3 kW output, premium copper windings, a rotatable drive end housing and integrated Overcrank Protection (OCP), the unit aims to match or replace a wide range of OEM part numbers while providing installation flexibility and robust protection against harsh operating environments.

Which engines and OEM numbers does this starter actually fit?

The 8200308 39MT starter is cross-referenced to many heavy-duty diesel platforms and replacement part numbers, making it suitable for fleet and single-unit repairs. Confirm engine model and pinion specs before ordering to ensure correct fit.

• Compatible engines: Caterpillar C10/C12/C13/C15/C16, 3176, 3406.
• Cummins coverage: ISX, ISM, M11, N14, L-10, Signature.
• Also fits: Detroit Diesel Series 60, Mack E7/EM7, Volvo VED12 and Ford, Kenworth applications.
• Replaces OEMs including 8200308, 3103304, 8201079, 19011530 and others; acts as 6924N substitute.

How does its construction help in tough jobsite conditions?

This starter uses heavy-gauge copper windings and a sealed modular housing to resist dust, moisture and vibration common on construction, mining and long-haul fleets. Rugged components and protective features reduce downtime and lower maintenance frequency compared with lower-spec replacement units.

• Sealed modular design resists contaminants and moisture ingress.
• Premium copper windings deliver stable, high-current performance.
• Durable drive assembly tolerates frequent start-stop cycles.
• Integrated OCP prevents overheating during extended cranking attempts.

What are the key technical specs and installation considerations?

The starter runs on a 12V system, delivers roughly 7.3 kW, and uses an 11-tooth pinion with clockwise rotation. It includes a rotatable drive end housing for flexible fitment, but professional installation is recommended to ensure correct engagement and electrical connections.

• Voltage: 12V; Output: 7.3 kW; Rotation: Clockwise.
• Pinion: 11 Tooth / 6-8 Pitch; Item weight ~32.2 lbs (14.6 kg).
• Features rotatable drive end housing, IMS and overcrank protection.
• Must be installed by a qualified technician to avoid fitment issues.

Will this starter protect my engine’s starter system during hard starts?

The built-in Overcrank Protection is designed to reduce the risk of damage from prolonged or repeated cranking by limiting overheating in the starter. While OCP adds a layer of defense, good battery health and correct starter sizing remain essential for reliable starting performance.

• OCP helps prevent overheating during extended cranking cycles.
• Designed to complement proper battery and electrical system maintenance.
• Helps extend starter service life under heavy-duty operating conditions.

Who is this for: The BZJUNZE 8200308 39MT starter is aimed at fleet managers, heavy-equipment technicians and owner-operators who need a durable, cross-referenced replacement for Caterpillar, Cummins, Detroit Diesel and other heavy-duty diesel engines. Choose this unit when you require a robust 12V starter with OCP, rotatable drive end housing and wide OEM compatibility — and arrange professional installation to ensure safe, precise fitment and reliable performance.