Though SV Racing is only team currently running Mercury Racing 860 engines, Supercat-class team owners have agreed to allow the fuel-injected mills into the class this season, https://www.speedonthewater.com/supe...-power-option/

That will be a heck of a spec engine.

So much for getting away from mother Mercury and using your own engine builder. I doubt those engines more cost effective to run. The current engines live all season.

“The 860s have been way more cost-effective for us,” Diorio said. “We have one set of engines that we ran all season without a problem and we are fully expecting to get through this season on the same set of engines.”