16851-57723 Fuel Shut Off Stop Solenoid for Kubota Diesel Engine

Product Overview

16851-57723 (also written as 1685157723) is a fuel shut-off stop solenoid. It mounts directly on the fuel injection pump of small-displacement Kubota diesel engines. When the ignition key is turned off, this solenoid automatically cuts off fuel supply to achieve safe engine shutdown. This unit is mainly 12V DC with a 3-wire connector; a small number of custom 24V replacement versions are available for special equipment.

Key Specifications

FAQs

Q: Which engines and machines fit the 16851-57723 stop solenoid?

A: It fits Kubota Super Mini 2-cylinder and 3-cylinder diesel engines: D722, D902, Z482, D782, Z602.

Machinery list:

Kubota: BX series compact tractors (BX1500D, BX1800D, BX1830D), ZD21F zero-turn mowers, mini excavators and small generator sets.

Bobcat: Early skid steer loaders and mini excavators including 316,320,322 powered by Kubota engines.

Other brands: JCB, Genie aerial work platforms, Dynapac light compactors equipped with Kubota small engines.

Q: What failure symptoms occur when this fuel stop solenoid goes bad?

A:

• Engine cannot shut down: Engine continues running after turning the ignition key off, caused by stuck plunger failing to cut fuel.
• Engine no-start or stalls immediately after startup: The pull or hold coil burns out, so the fuel control rack cannot stay open.

Q: What is the working principle of this Kubota fuel shut-off solenoid?

A: When the ignition is switched on, the solenoid energizes and pulls the fuel rack open to allow fuel delivery for engine operation. Once the key is turned off, power is cut, and the spring pushes the plunger back to shut off fuel flow and stop the engine.

Q: What should I verify before ordering this solenoid?

A: Confirm your engine model and machine serial number, check the voltage requirement and 3-wire connector, and cross-check the original part number to ensure proper fitment.

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