Wacker Neuson 5000408512 Throttle Return Spring

The Wacker Neuson Throttle Return Spring is a genuine OEM throttle return spring designed for a wide range of Wacker Neuson equipment including the MP12, MP15, and MP20 single direction plate compactors, BPS1550c and BPS2050c plate compactors, MFS735 gasoline powered floor saws, MCP2 and MCP3 pumps, ZEN-L and ZEN-C single direction plates, and D3.5G2 and D3.5G3 modular internal vibrators. Sourced directly from Wacker Neuson, this is the same spring installed during original assembly — no guesswork about fit or function. Genuine OEM specification means the meets the exact tension and material requirements Wacker Neuson engineers designed the throttle system around. Whether you're servicing a plate compactor on a commercial paving job or maintaining a pump on a rental fleet, this spring keeps the throttle control operating as intended.

Key Features

• Correct Spring Tension for Throttle Control — Manufactured to OEM tension spec, ensuring the throttle returns to idle consistently and without delay.
• Direct OEM Replacement — Drops into the throttle linkage assembly exactly as the original, using the same mounting points and spring geometry.
• Broad Equipment Compatibility — Fits MP12, MP15, and MP20 plate compactors, BPS1550c and BPS2050c, MFS735 floor saws, MCP2 and MCP3 pumps, ZEN-L and ZEN-C plates, and D3.5G2/D3.5G3 vibrators.
• Throttle Safety Function Preserved — A functioning throttle return spring is critical to engine speed management; a broken or fatigued spring can prevent the engine from returning to idle, creating an unsafe operating condition.
• Genuine Wacker Neuson Part — Backed by Wacker Neuson's OEM supply chain, so you get the correct material grade and coil specification rather than a generic substitute.

The throttle return spring pulls the throttle lever or cable back to the idle position whenever the operator releases input. Without a properly functioning spring, the engine may hold at an elevated RPM rather than returning to idle — reducing operator control and placing unnecessary strain on the engine and drive components. On equipment like plate compactors and floor saws where throttle response directly affects output and safety, a worn or broken throttle return spring should be replaced immediately to restore normal machine behavior.

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.

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