Multiquip 8941741830 Nozzle Spring Spacer Holder

The Multiquip 8941741830 Nozzle Spring Spacer Holder is a genuine OEM component designed for the DCA-45USJ ultra-silent diesel generator. Sourced directly from Multiquip, this part meets the exact specifications required by the 4JG1 engine fuel injection system fitted to the DCA-45USJ. Verify your model and engine code before ordering to ensure a correct, direct installation.

Key Features

• Genuine OEM Fuel Injection Precision — Manufactured to the exact dimensional tolerances required by the 4JG1 engine injector assembly, ensuring the spring and nozzle seat correctly within the injector holder.
• Direct Installation Fit — Engineered as a drop-in replacement that seats into the existing injector bore without rework, preserving the injector stack height and compression seal.
• Confirmed DCA-45USJ Fitment — Specifically validated for the DCA-45USJ ultra-silent generator platform powered by the Isuzu 4JG1 diesel engine.
• Consistent Injection Pressure — A properly seated spacer holder maintains the correct spring preload on the injector nozzle, supporting stable fuel atomization and consistent combustion under load.
• Fuel System Integrity — Correct spacer geometry is critical to maintaining injection timing and nozzle opening pressure; a worn or incorrect spacer can cause rough running, excessive smoke, or hard starting.

The nozzle spring spacer holder is a precision component within the fuel injector assembly of the 4JG1 diesel engine. It positions and preloads the injector spring, which controls the pressure at which the nozzle opens to spray fuel into the combustion chamber. When this spacer is worn, damaged, or incorrectly dimensioned, injection pressure shifts outside specification — leading to poor fuel atomization, uneven combustion, increased exhaust emissions, and reduced generator output. Replacing it with the correct OEM part restores proper injection behavior and protects the surrounding injector components from accelerated wear.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.