jgreene69
Veteran Member
I'm currently in the market for a 1997-2005 model year Mainship 390. I want a single engine. Looking at Yanmars 300-380 hp. Any experience or advise would be appreciated before I pull the trigger..
I have a single screw Cummins 330hp in my '01 390. Great boat, no issue with the Commins 6bta
I would suggest a bow thruster if you go with a single. .
why avoid twins ?
Avoid the 6LY2 420 or 440.
I had eliminated the 390 from my search earlier because it was too slow, but recently heard about the 440s. Darn I was hoping those would give me the speed I want while still maintaining some engine room space. Just curious what the problems are with those engines?
BD
Which is the most desired boat , the 39 ft or the 400 mainship?
Thanks and that will be a mindset that I fully enjoy - when I'm retired. I simply do not have that luxury today. I don't live on the water - I'm 4 hours without traffic - 5 on summer weekends - from the boat. My cruising grounds are isolated. "Nearby" destinations are 75 - 100 miles away. At 15 or 18 knots I can realistically travel somewhere and return (with safety margin) in a 3 day weekend. At 7 or 8 I simply can't.
They put the 440 in there so that people could do that. I was simply wondering what it is about that engine that would lead Ski to conclude that. I highly respect his opinion.
Thanks and that will be a mindset that I fully enjoy - when I'm retired. I simply do not have that luxury today. I don't live on the water - I'm 4 hours without traffic - 5 on summer weekends - from the boat. My cruising grounds are isolated. "Nearby" destinations are 75 - 100 miles away. At 15 or 18 knots I can realistically travel somewhere and return (with safety margin) in a 3 day weekend. At 7 or 8 I simply can't.
They put the 440 in there so that people could do that. I was simply wondering what it is about that engine that would lead Ski to conclude that. I highly respect his opinion.
I'm aware of the typical performance of these models, and 18 WOT is what Powerboat Guide provides as a guide for the 390 with twin Yanmar 230s