Multiquip 8973647750 Rubber Fuel Leak Hose DCA-45USJ 4JG1

The Multiquip 8973647750 is a genuine OEM Rubber Fuel Leak Hose DCA-45USJ 4JG1 designed for the DCA-45USJ ultra-silent diesel generator. Sourced directly from Multiquip, this part meets the exact specifications of the original component installed at the factory. It is confirmed to fit the DCA-45USJ, which is powered by the Isuzu 4JG1 diesel engine. Order with confidence knowing you are getting the correct part for your machine.

Key Features

• OEM Fuel System Integrity — Manufactured to the same material grade and dimensional spec as the original hose, ensuring a proper fuel-tight connection in the leak-off circuit of the Isuzu 4JG1 engine.
• Direct Drop-In Fitment — Engineered to connect to the existing fuel leak-off fittings on the DCA-45USJ without modification, using the same routing and attachment points as the original.
• Confirmed Compatibility — Specifically matched to the DCA-45USJ ultra-silent diesel generator powered by the Isuzu 4JG1 engine.
• Fuel System Performance — A correctly seated leak hose maintains proper fuel return pressure in the injection system, supporting consistent engine starts, smooth running, and fuel efficiency under load.
• Fuel Safety Critical Component — A cracked or deteriorated fuel leak hose can allow diesel seepage near heat sources; replacing with a genuine OEM hose restores the integrity of the fuel return circuit and reduces fire risk.

The fuel leak hose — also called a fuel return or overflow hose — routes excess fuel from the injectors back to the fuel tank or return circuit on the Isuzu 4JG1 diesel engine. This controlled return flow is a normal part of diesel injection operation and keeps injection pressure balanced across all cylinders. When this hose cracks, hardens, or develops a leak, it can cause hard starting, rough running, fuel odor, and potential fire hazard due to uncontrolled diesel seepage.

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.