I picked up a pair of FAST EZ EFI kits at a swap meet. I am contemplating trying it on a hp500 carb engine. My concern is water on the O2 sensor with the Gil exhaust. The risers are dry till the transom, but I have heard there is a fair amount of reversion with the Gil manifolds. I would weld in an O2 bung in the riser, right at the manifold / riser joint.
Has anyone used the FAST EFI system on a boat ?
Anyone want to swap a complete pair of Merc hp500 EFI for the new in the box FAST systems. I have two sets, complete with fuel pump kit and harness.