Insulator, Carb.

To stop vibration and fuel 'fizz' affecting the optimum fuel atomisation, these insulators will need replacing from time to time. All plastic and rubber items like this fall prey to heat, pressure, grease and general dirt.
You might like to check the online schematic covering this model, and ensure you order all the parts required - the more parts you order in one shipment the lower the respective shipping costs.

Helps stop heat and vibration taking the edge of the performance of the carburettor.

Fitting new items removes the doubt experienced when reusing old parts that may or may not be up to the job.