All of which is fascinating I'm sure, but none of these is a spark-ignited diesel outboard.
I'm intrigued as to whether being spark ignited makes this an Otto-cycle engine or something halfway between a true Diesel and an Otto. It'd be interesting to know what sort of compression ratio it's using as well — presumably higher than the petrol version, but not that high, or there'd be no need for a spark plug. The block might not be able to handle typical diesel engine compression either.
The current 175hp OptiMax is 2.5L and 195kg, whereas this is 3.0L and 236kg.
From this document [http://www.mercuryracing.com/wp-cont...nce-Chart.pdf]
that went with it:
This engine does not meet EPA, C-ARB, or CE exhaust emissions requirements... It does not conform to the exhaust and noise emissions requirements of the Recreational Craft Directive.
So it's not for the likes of most of us anyway. I know the RCD doesn't apply to racing, but what about CE? Does that limit it to military applications only?