You could follow the steps Yamaha has taken to isolate the floor, but it might be costly. Maybe not! Four isolation posts under that fuel tank lid may go farther than the hatch insulation that has become the norm on retrofit. But I agree with
@MikeyL , the reengineered Yamaha seems at first glance to be a quantum leap in applied technology in a good many areas, making an upgrade the cheapest alternative to some of these mods. But looks can be deceiving, and there is real value in the pre 2015 boats. All of the real added improvements in the 2015 240 series don't total the increase in msrp IMO. They have added a good deal more things to the boat and made changes that make sense. Many of these things are just different, and the cost to do them vs what they were doing shouldn't have changed the msrp that much. Getting a return on investment used to be done over time, not up front. So getting these costs paid for at purchase seems a bit over the top at first glance to me. That said, maybe it isn't. I like the buzz the new boat is creating, and I have no doubt it is a better boat than the previous...but it is a different boat too, with a much different price point. And...as a member of a consumer forum that we have here, the buzz is great, but as a membership, we have the ability to measure the value here much better from hindsight. That means that
@Williamsone46 , and the guys that buy this new boat design need to use them and give us their opinions...not just hype Yamaha...let's not pay for Yamahas Ad campaign, let them spend the money to do that. But let's not kill a product before it is tested either. All of the previous years of boats may benefit from the new designs. You don't have to start from scratch to compartmentalize these boats, there may be some improvement that can be made that is at a low enough cost that the applied technology can be retrofitted...if lowering the sound level is that important to you.
@Glassman , what would it cost to scab on a keel rib extension on an existing boat to add longitudinal stability when combined with an aftermarket rudder assembly or fins? I get that they patented their rudder, but hey, boats have had rudders a long time, as have jet pumps been around a long time. My guess is that what improvements the aftermarket made in these boats was ahead of Yamaha, and they went the way they did, not because it was the best way, but because they other way may have already held patents to prevent them from going that way
@Cobra Jet Steering LLC . I don't remember the guy that came out with the rudder a few years back...that we all scoffed at up front, but his design is very similar to what Yamaha came up with.
My point here is that there are always creative folks out there, make improvements to existing technology, that makes a contribution to future developments. I don't see 10's of thousands of preowned Yammi's being scrapped to jump to the new and improved. I firmly believe that these advances that Yamaha is making in their 2015 240/242 is a direct result of our forum involvement. It is good that they are listening, but it would be good for them to balance their achievements from our input with some support of the earlier boats they made too, and come up with some parts to support them too. They did this with the clean out plug rebuild kit, but they hid this in a newer model and didn't add it to existing parts lists, even though those parts would fit earlier plugs too. It was forum members that found this and discovered it would fit. I bet that the jetboaters.net members get a boost and benefit from the improvements present in the new boats without throwing the baby out with the bathwater!
