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601856 - Carburettor Piston

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- €44,10
€44,10
€44,10 - €44,10
€44,10
OEM Part
OEM: Made by an Original Equipment Manufacturer. This part is made by an original equipment manufacturer or under their license, ensuring compatibility and quality.
Carburettor Piston for the Zenith carburettor fitted to the 2.25L petrol engine.

The piston is the air valve that slides within the carburettor's suction chamber, rising and falling with engine demand to vary the air passage and control the metering of fuel through the jet.
Alternative Codes
601856

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Frequently asked questions

What does the carburettor piston do on a 2.25 petrol engine?
The carburettor piston is the air valve inside the Zenith carburettor's suction chamber on the 2.25-litre petrol engine. It rises and falls with engine demand, varying the air passage and controlling how much fuel is metered through the jet. It's central to smooth running and throttle response.
Where does the piston sit inside the carburettor?
The piston sits in the suction chamber at the top of the Zenith carburettor, sliding vertically as engine vacuum changes. It typically carries a tapered needle on its underside that moves through the jet, so its position sets the fuel mixture. It needs to slide freely without sticking.
What are the signs a carburettor piston needs replacing?
A worn or sticking carburettor piston typically causes poor throttle response, hesitation, uneven idle, or a rich mixture. Wear on the piston or scoring in the suction chamber stops it sliding cleanly. Replacing the piston restores correct air metering on the Zenith carburettor and 2.25 petrol engine.