YS Engine YSF1555 FZ High-Speed Needle Seat for Carburettor Tuning  [YSF1555]

YS ENGINE HIGH SPEED NEEDLE SEAT FZ #F1555
Price:
CAD$8.26
Brand:
YS Engine
Model:
YSF1555
GTIN:
4560105735703
Condition:
Brand New
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Precision high-speed seat

This YS Engine YSF1555 high-speed needle seat is a replacement carburettor part intended to restore reliable high-rpm fuel metering in RC glow engines. The FZ style seat engages with the high-speed needle and directly influences mixture control at elevated revs.

Installation is straightforward for those familiar with glow carburettors: remove the bowl, access the needle assembly, and fit the seat with common hand tools. Keep threads clean and align the seat carefully to avoid cross-threading; a light lubricant on the needle shank helps ensure smooth needle travel.

As a functional component, the seat affects repeatability of high-speed needle settings rather than acting as a tuning adjuster by itself. Regular inspection for deposits or wear and confirming correct seating after reassembly will help maintain consistent high-rpm behaviour.

How does this seat change high-rpm mixture control?

It provides a precise seating surface so the high-speed needle can meter fuel consistently at high engine speeds, which improves repeatability of needle adjustments and top-end response.

Can I install the YSF1555 myself?

Yes. Follow basic carburettor procedures: drain fuel, remove the bowl, extract the needle assembly, fit the new seat, and reassemble while avoiding contamination and cross-threading.

How often should I inspect the needle seat?

Inspect during routine servicing or after runs that show inconsistent top-end. Clean with appropriate carburettor cleaner and replace the seat if you find pitting or damage.

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