O.S. Engine OS27915100 60B Carburettor Sealing Washer for RC Nitro Carburettors  [OS27915100]

Small 60B Carburettor Seal

This O.S. Engine OS27915100 sealing washer is a compact replacement part made for RC nitro carburettors. It creates a seal between carburettor components to reduce fuel and air leaks that can disturb idle and throttle response.

Fitting is straightforward for hobby technicians: remove the carburettor cover or needle assembly as required, seat the OS27915100 washer correctly, then reassemble and check for leaks. Use basic hand tools and work on a clean bench to avoid contaminating the carburettor bore.

As part of routine tuning and upkeep this sealing washer helps keep needle settings more predictable. Replacing worn seals can cut down on repeat needle adjustments after running, helping preserve steady idle and transition behavior.