Tamiya 54777 - FS-12FZ/FN Throttle Return Springs Performance Safety Set [54777]

Tamiya 54777 - FS-12FZ/FN Return Spring (2pcs) OP-1777

Price:

£4.78

Brand:

Tamiya

Model:

54777

GTIN:

4950344547777

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Spares / Hop-ups - Tamiya - TG-10 MK.II

Engine protection for FS-12FZ and FN installs

The Tamiya 54777 Throttle Return Springs are designed to force the throttle back to a neutral setting, helping to prevent accidental over throttle and subsequent engine damage. They also help maintain a consistent idle position for safer running.

Intended compatibility

These return springs are tailored for vehicles fitted with FS-12FZ or FN engines. They are intended as a practical upgrade for modellers and racers seeking simple mechanical redundancy for the throttle system.

Will fitting these affect throttle calibration?

If installed and adjusted correctly they should not interfere with normal calibration; ensure the idle is set with the spring in place to get the correct neutral point.

Can they prevent accidents from stuck throttle?

The springs help ensure the throttle returns if the servo or linkage fails, reducing the chance of sustained high throttle, but they are an aid not a full safety system.

How often should I inspect the springs?

Inspect them regularly before running sessions and replace at the first sign of fatigue or corrosion to maintain reliable operation.

Are there common installation pitfalls?

Avoid routing the spring where it can snag or chafe, and do not overstretch it during fitting as that will reduce service life.

Should I pair this with other safety upgrades?

Combining a return spring with routine checks of throttle linkage, servo function and fuel system reduces overall failure risk and is good practice for performance builds.