Key Features

Genuine OEM diaphragm – Briggs & Stratton Diaphragm 272638S, manufactured to Briggs & Stratton original equipment standards for precise fit and dependable performance.
Responsive fuel control – Designed to flex with changes in engine vacuum/pressure to meter fuel accurately across varying loads and throttle positions.
Durable construction – Built to withstand repeated flexing, exposure to fuel, heat and engine vibration for reliable long‑term operation.
Easy replacement – Intended for straightforward installation during routine carburettor servicing or rebuilds, reducing downtime.
Specific compatibility – Suitable for selected Briggs & Stratton petrol engines requiring this diaphragm as part of the fuel pump system, including L-head twin cylinder engines and some 8hp/11hp horizontal crankshaft configurations.

Product Details

Product Type – Carburettor Fuel Pump Diaphragm
Part Reference – 272638S
Application – Helps regulate fuel flow by responding to engine vacuum/pressure changes within the carburettor fuel pump assembly
Construction Note – Durable construction designed to withstand repeated flexing, exposure to fuel, heat and engine vibration
Replacement Guidance – Fitment depends on the exact engine model and carburettor design; verify against your engine model/tag or your existing diaphragm before ordering

– Used in Briggs & Stratton petrol engines that require this diaphragm as part of the fuel pump system
Engine Families – All L-head (side valve) twin cylinder engines and some 8hp and 11hp horizontal crankshaft engines fitted with a fuel pump
Typical Applications – Lawn mowers (push and self‑propelled), petrol-powered garden machinery such as compact tillers and cultivators, pressure washers and generators, and other outdoor equipment requiring this diaphragm type
Fitment Tip – Diaphragm compatibility depends on the exact engine model and carburettor design; always check the engine model/tag or compare with your existing diaphragm to confirm proper fit before ordering