Direct Replacement Stop Solenoid — 12V OEM-Spec for Hatz 3131C, L & M Series Engines

Hatz diesel engines are built for one thing above all else: reliability in demanding, often remote applications where maintenance access is limited and downtime is not an option. The 3131 series — in C, L, and M configurations — powers generators, construction equipment, and industrial machinery that operators depend on to run when called upon. The stop solenoid is the engine’s primary safety control: it cuts fuel supply to the injection system when de-energized, ensuring a complete, fail-safe engine shutdown on command. When it fails, you get the two classic failure modes: the engine won’t start (solenoid stuck closed) or it won’t shut off (solenoid stuck open) — both are serious issues on equipment that often operates in isolated or safety-critical environments. This direct-fit 12V replacement solenoid (03938010 / 01660910 / 01660911) restores reliable shutdown control across all three Hatz 3131 variants.

✅ Direct-Fit Compatibility

• Hatz Engines: 3131C, 3131L, 3131M
• Voltage: 12V
• Direct replacement — no modifications required
• Suitable for generators, construction equipment, and industrial machinery applications

🔧 Fail-Safe Shutdown Control for Hatz 3131 Series

• Fail-safe fuel cutoff — de-energized solenoid cuts fuel supply to the injection system completely, ensuring positive engine shutdown on command or power loss
• 100% new aftermarket — not rebuilt or reconditioned; starts with a full service life
• 12V specification — correct voltage for Hatz 3131 series engine electrical systems
• Triple OEM cross-reference — covers 03938010, 01660910, and 01660911 for confirmed fitment confidence regardless of how your parts catalog lists it
• Resolves no-start & no-stop conditions — replaces a stuck-closed solenoid (engine won’t start) or stuck-open solenoid (engine won’t shut off)
• No dealer markup — OEM-equivalent quality at aftermarket pricing

📦 What's Included

• 1 × Stop Solenoid 12V (03938010 / 01660910 / 01660911)

🔑 Key Specs

• Part Numbers: 03938010, 01660910, 01660911
• Voltage: 12V
• Condition: 100% New Aftermarket
• Product Type: Stop Solenoid (Fuel Cutoff)
• Fitment: Hatz 3131C / 3131L / 3131M engines

In stock and ready to ship. Order today and restore reliable shutdown control to your Hatz 3131 engine.