Carburettor Needle Kit 20M-60L OS27981910 for RC Engines O.S. Engine  [OS27981910]

O.S. ENGINES NEEDLE 20M,40E,60B,60G,60H,60L
Price:
AUD$10.59
Brand:
O.S. Engine
Model:
OS27981910
GTIN:
4531028117464
Condition:
Brand New
Write a review

Service and tuning needle set

This item covers the O.S. Engine OS27981910 needle codes 20M, 40E, 60B, 60G, 60H and 60L as replacement components for carburettor needle valves on glow-powered RC engines. The code marking is used to identify the correct needle profile when carrying out maintenance.

Replacement is a routine carburettor procedure: remove the top, extract the needle assembly, inspect the seat and tip for damage or contamination, and insert the matching code from the set. Refit and check for any fuel seepage before running the engine.

After fitting run progressive tuning: bench adjustments then a controlled on-track trial. Needle changes influence idle, midrange and throttle response; proceed with small changes, monitor temperatures, and fine tune mixture and idle screws for stable performance.

Can I visually confirm the correct replacement needle?

Yes. Match the stamped code and examine the needle tip profile; selecting the identical code from the kit preserves the original mixture map for predictable performance.

What steps reduce the risk of a poor tune after replacement?

Begin with conservative settings, run incremental tests to watch temperature and response, and only make modest mixture and idle adjustments to avoid sudden lean conditions that can harm the engine.

Copyright © 2008-2026 rcjaz.com.au All rights reserved