OMC - johnson and evenrude did jet drive outboards way back like 30 years ago. We use to work on them. Merc did the OPTIMAX 2 stroke DFI outboard powerhead matched up with Merc jetdrives - I know I use to sell them brand new at my dealerships up till 2011. Man those sold good. 17 thru 23 ft boats. We competed against the Yama jetdrive boats and the sea doo jet drive boats.

I believe Yamaha and Evinrude still offer the jet outdrives...guys use them on river boats.