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Briggs 5hp Flathead Pump Diaphragm
Briggs Raptor Carburetor Pump Diaphragm REF#394
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Briggs 5hp Flathead Pump Diaphragm

Part Number: 272538S
Online Price: $3.29
OEM Briggs & Stratton 272538S Pump Diaphragm for Model 13 & Horizontal Engines
Availability: In Stock.

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Description

Briggs & Stratton 272538S Carburetor Pump Diaphragm – OEM for 5HP Flathead & Horizontal Engines


Restore reliable fuel delivery and smooth engine performance with the Briggs & Stratton 272538S Carburetor Pump Diaphragm Kit. This genuine OEM replacement part is specially designed to fit Briggs & Stratton 450–600 Series horizontal shaft engines and the popular Model 13 5HP Flathead / Raptor.


Ideal for carburetor maintenance or repairs, this diaphragm ensures consistent fuel flow by regulating fuel pump pressure inside the carburetor. Manufactured to exact Briggs & Stratton specifications, it provides a perfect fit, superior durability, and peak performance for your small engine.


Key Features:

  • Genuine Briggs & Stratton Diaphragm Kit – OEM Quality
  • Fits 450–600 Series Horizontal Shaft Engines (2–5 Gross HP)
  • Also Fits Model 13 5HP Flathead / Raptor Engines
  • Restores Proper Fuel Pump Function for Consistent Carburetion
  • Replaces Part Numbers: 272538, 555119
  • Made from Fuel-Resistant Materials for Long Life & Durability


Why Choose Genuine OEM?

Only genuine Briggs & Stratton parts are built to the same engineering standards as the original equipment. This ensures seamless fit, dependable performance, and long-term engine protection.

FAQ

Q1: What engines is the 272538S diaphragm compatible with?
A: It fits Briggs & Stratton 450–600 Series (2–5 Gross HP) horizontal engines, including the widely used Model 13 5HP Flathead / Raptor.


Q2: What does this diaphragm do?
A: This diaphragm regulates fuel flow by enabling the carburetor’s internal fuel pump. A damaged diaphragm can cause fuel starvation, surging, or difficulty starting.


Q3: Is this an OEM Briggs & Stratton part?
A: Yes, the 272538S is a genuine Briggs & Stratton OEM part, designed and tested to meet factory specs for fit and performance.


Q4: What part numbers does this replace?
A: It replaces Briggs part numbers 272538 and 555119.


Q5: When should I replace the diaphragm?
A: Replace it if the engine surges, stalls, has trouble starting, or if you're rebuilding the carburetor during regular maintenance.

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