This brand name of the electric fuel pump is Walbro and I purchased it from JC Whitney. It is a bellows type pump, with some adjustment for pressure. I do know that many are used in marine applications, (therefore I deemed it dependable). Check it out on JC Whitney's website.

You did the best thing by replacing the primer pump if it was leaking from the inside. Mine was leaking where it screws into the supply pump.

Keep us posted on your progress. I would have figured that vegetable oil was more expensive than diesel fuel.