on a 388 hustler (blackcloud)we run the port engine and blower reverse rotation to cancel the torque roll they will accellerate like a funny car on the water with BIG power but they are very nervous above 140 and twichy above 130.....theres quite a learning curve to drive these beast as you learn to lower the drives to go faster but do not trim the drives at speed! you set the drive indicators to the number that works at the speed you want to go then slam power and drive thru the weirdness and towing a bus feeling ....its an amazing ride when you get it right but horrifying when you get it wrong you can go from rubrail to rubrail in .2 seconds a few times... then idle in change the underwear and get up the nerve to try again!