• Welcome to Jetboaters.net!

    We are delighted you have found your way to the best Jet Boaters Forum on the internet! Please consider Signing Up so that you can enjoy all the features and offers on the forum. We have members with boats from all the major manufacturers including Yamaha, Seadoo, Scarab and Chaparral. We don't email you SPAM, and the site is totally non-commercial. So what's to lose? IT IS FREE!

    Membership allows you to ask questions (no matter how mundane), meet up with other jet boaters, see full images (not just thumbnails), browse the member map and qualifies you for members only discounts offered by vendors who run specials for our members only! (It also gets rid of this banner!)

    free hit counter
  • Guest, we are pleased to announce that Hydrophase Ridesteady is offering an extra $100 off for JETBOATERS.NET members on any Ridesteady for Yamaha Speed Control system purchased through March 7th, 2025. Ridesteady is a speed control system (“cruise control”) that uses GPS satellites or engine RPM to keep your boat at the set speed you choose. On twin engine boats, it will also automatically synchronize your engines.

    Click Here for more information>Ride Steady group buy for JetBoaters.net members only

    You can dismiss this Notice by clicking the "X" in the upper right>>>>>

Yamaha announces new engine!!!

Everyone keeps speculating what the new section of the Yamaha plant in Tennessee is I'm now wondering if this is where they plan to build this engine.
 
The good 425 hp, the bad 1000lbs.
 
5 fuel pumps, up to 2900psi.... wow
 
This is just silly. The fuel bill with quad 425 NO thank you. I’m sure it’s fun though.
 
If you can afford a few of those engines on a large boat, fuel prices are not an issue
 
ClemsonTiger said:
Wrong. The 4.2L V6 weighs just under 600 lbs. A 5.6L V8 does not weigh 66% more.
Click to expand...
Yeah, a V8 has more holes in it than a V6 so obviously it's lighter :wacky: :wideyed::winkingthumbsup"
 
DieselCamel said:
This is just silly. The fuel bill with quad 425 NO thank you. I’m sure it’s fun though.
Click to expand...

If you can afford a boat that will take Quad 425s, paying for gas is not a concern!
 
I'm not a huge fan of very high pressure injection systems, because by design, it takes more work and more presission to achieve. I hope they nail the reliability factor and prove me wrong.
 
Sbrown said:
Yeah, a V8 has more holes in it than a V6 so obviously it's lighter :wacky: :wideyed::winkingthumbsup"
Click to expand...

you got to stop man. I am on the floor lauching for 5 minutes and my wife will be sending you a bill if I have a heart attack from not being able to breath
 
Pretty good power out of a N/A 5.6. Still needs a supercharger though. [flag]
 
Bet the first place I will see one of these in person is on a bass boat but only if it is docked, otherwise just a blur.
 
Ha what about this?? Saw this on Facebook today. Someone took pic on 285 in Atlanta.
12C8EFF3-F914-4E2D-9A69-A021E87C68A5.jpeg
 
Neutron said:
Thats just ridiculous
Click to expand...

Almost looks fake doesn’t it? Surely it isn’t going to Lake Lanier. Wouldn’t surprise me though
 
1E46ACDA-033C-42B3-87D6-99062CEA4549.jpeg Wow! That trumps the best one I have seen...
 
You must log in or register to reply here.

Similar threads

zipper
Yamaha to buy Torqeedo
    • Informative
    • Like
Replies
1
Views
446
buckbuck
buckbuck
dalcini
2018+ YDS engine diagnostic scanner
Replies
4
Views
503
dalcini
dalcini
2kwik4u
Interesting Jetboat related Car and Driver article
    • Like
    • Informative
Replies
7
Views
716
2kwik4u
2kwik4u
Y
SOLD 2013 Yamaha SX 240 for sale New Jersey
Replies
9
Views
653
yam240sx
Y
D
Brand New Boat - What to do?
Replies
6
Views
194
BumbleBee255
BumbleBee255
Back
Top