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

Leak Prevention and Testing

The O.S. Engine OS27915100 sealing washer is a precision replacement for RC nitro carburettors. It seals interfaces inside the carburettor to reduce fuel and air leaks that can cause unstable idle or poor throttle transitions.

Replacing the washer is a routine task: remove the carburettor cover or needle assembly as required, fit the OS27915100 ensuring it seats properly, then reassemble and inspect for leaks. Carry out the work on a clean bench with basic hand tools to avoid contaminating passages.

For diagnostic and tuning work the sealing washer supports consistent needle behavior and more predictable responses to adjustments. Renewing worn seals is a simple measure to restore reliable idle and transition characteristics.