MASTERTECH MARINE
offers this Alternative replacement pump MTM-03-70 for VRO on Crossflow V4 motors
Mounts on Air Silencer in place of original VRO pump. Has bracket for easy mounting.
This pump uses the VRO pulse hose to operate it.
You can also use pump 8556 and mount to manifold, as done prior to VRO pumps.
That one gets the pulse directly through the back to operate it.