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Main Metering Diaphragm HS
237-653 Tillotson HS Main Metering Diaphragm
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Main Metering Diaphragm HS

Part Number: 237-653
Your Price: $5.23
Main Metering Diaphragm HS
Availability: Out of Stock.


Tillotson Main Metering Diaphragm operates to open the fuel inlet needle valve which allows fuel to flow to the high and low fuel circuits.

You may hear us describing this diaphragm as the one that has the metal в€ÅƒÅ¡wagon wheelв€ÅƒÅ› in the middle. The в€ÅƒÅ¡wagon wheelв€ÅƒÅ› stabilizes the diaphragm and helps to control is movement so the dimple in the center is right above the tip of the fulcrum arm. 

237-653 OE Tillotson Main Metering Diaphragm fits HS Model Carburetors

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