Reply To: New Member Introduction

[Gary H.]

Thanks Seakaye12. I just did some research and you are correct. A 2 stroke can produce up to 8 psi difference from pressure to vacuum in a pulse meaning it can produce up to 8 psi fuel pressure. A 4 stroke only produces 2-3 psi difference from vacuum to atmosphere pressure and typically uses an internal spring to return the diaphragm from the the vacuum pulse to normal atmospheric pressure. I ordered a Waldro FPC – 1  – 1 impulse pump (supposedly good to 25 hp) and will install when I receive it.