Isolator Rings and Gaskets can be found between the Carburetor and the Intake Manifold on many 4-Stroke Units. In many cases when suffering from a lack of performance the original isolator ring will be cracked and or the gasket will require replacement. If 19mm Carburetor then you need a 19mm Ring/Gasket Recommendation: It is highly recommended that the isolator ring and gasket be replaced as routine maintenance to ensure proper carburetor idling and operation.
Isolator Rings and Gaskets can be found between the Carburetor and the Intake Manifold on many 4-Stroke Units. In many cases when suffering from a lack of performance the original isolator ring will be cracked and or the gasket will require replacement. If 19mm Carburetor then you need a 19mm Ring/Gasket Recommendation: It is highly recommended that the isolator ring and gasket be replaced as routine maintenance to ensure proper carburetor idling and operation.