YS Engine YSS2021 56SR Carburetor Seal O-ring for YS Carburetors  [YSS2021]

YS ENGINE CARBURETOR O-RING 56SR #S2021
Price:
AUD$6.37
Brand:
YS Engine
Model:
YSS2021
GTIN:
4560105741810
Condition:
Brand New
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Carburetor Seal O-ring for YS Engine

Listed as YS Engine YSS2021 and marked 56SR, this O-ring acts as a replacement seal for RC model carburetors. It is used to prevent fuel seepage and to support stable idling and consistent fuel feed during engine use.

The part is suitable for routine upkeep and repair when the factory O-ring shows signs of hardening, cracks, or loss of elasticity. Replacing the old ring restores proper sealing contact and reduces leak-related tuning issues and throttle irregularities.

Fitting guidance: clean and inspect mating surfaces before installing the O-ring, replace compromised clamps or fittings, and avoid overstretching while seating the seal. Ensure fuel lines are unobstructed and only recheck needle settings once you have a confirmed leak-free installation.

What material behaviour should I expect from the YS Engine YSS2021 O-ring?

The 56SR compound is intended to remain flexible under normal fuel exposure; over time it can harden or crack, at which point replacement restores correct sealing.

How does a worn O-ring affect engine tuning?

Leaks from a degraded O-ring upset fuel pressure at the needle and can cause unstable idle and inconsistent throttle response. Replacing the seal often stabilises tuning behaviour.

Is professional servicing required to replace this O-ring?

No, basic mechanical skill is sufficient; however, ensure cleanliness and correct seating to avoid pinching or stretching the new ring.

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