O.S. Engine OS27915100 Carburettor Sealing Washer 60B for RC nitro carburettors  [OS27915100]

Carburettor sealing washer 60B

This O.S. Engine OS27915100 sealing washer is a small-scale replacement part designed for RC nitro carburettors. It serves as a sealing interface between carburettor components to help prevent fuel and air leaks that affect idle stability and throttle response.

Installation is straightforward for hobby technicians: remove the carburettor cover or needle assembly as required, replace the old washer with the OS27915100 part ensuring correct seating, then reassemble and test for leaks. Use basic hand tools and work on a clean bench to avoid contaminating the carburettor bore.

In tuning and maintenance work the sealing washer is a service item that supports consistent needle settings and more predictable tuning changes. Replacing worn seals can reduce the need for repeated needle readjustments after driving sessions, helping you maintain reliable idle and transition behaviour.