A fuel pump diaphragm suitable for 1.5-4HP Petter M engines.
Laser cut in the UK from hardened and tempered high carbon steel 0.25mm thick.
Approximate dimensions are 4.5" wide by 4 7/8" tall with four 3/8" diameter stud holes.
Fuel Pump Diaphragm For 1.5-4HP Petter M Engines