Boatmad.com


Reply
 
Thread Tools Display Modes
 
Old 19-02-2007, 10:35 PM   #1
Traveling
 
Country: UK
Location: Alderholt
Occupation: Aerospace
Boat name: T/T D2S
Boat make: Midas 27' Cat, Argo 16 Cat. Avon Rib Thingy
Engines: Merc 280-ROS -JSRE,65Xs, 75 Stinger, Yam 60
Cruising area: Any Seedy Bar

Join Date: Sep 2004
Location: Alderholt
Posts: 4,225
350 HP V8 Outboard

If You MUST
__________________

__________________
It is impossible to lick your elbow.

Team25Racing.com

At least 75% of people who read this will try to lick their elbow!
BluFin is offline   Reply With Quote
Old 19-02-2007, 10:43 PM   #2
Registered User
 
scottyboy's Avatar
 
Country: United kingdom
Location: West Sussex
Occupation: Grease Monkey
Interests: Makin my boat faster!
Boat name: S.B Racing
Boat make: Ocke mannerfelt canopied B23 / Zapcat
Engines: Merc 200XS Gen 2 / Tohatsu 50
Cruising area: littlehampton/Southampton

Join Date: Jan 2005
Location: West Sussex
Posts: 2,656
"It's great to know we will have them on the transom soon"

Bet they wont be on there for long on some boats if they weigh as much as i think they will! they look massive!
__________________

__________________
Class 3C Mono EPA National speed record holder 95.35 mph Avg!
scottyboy is offline   Reply With Quote
Old 20-02-2007, 01:44 AM   #3
Registered User
 
RossM's Avatar
 
Boat make: Phantom 23

Join Date: Mar 2006
Posts: 1,693
Send a message via MSN to RossM
5.3 ltr! JEEEZ!!
i recon our engine would use less fuel then that, and that weighs double what our 355 does.
think it will be a o.k engine for a 30+ footer though(twins)

Whats the benifits of 4 stroke over 2 stroke?
why arnt 2 stroke engines used as inboards and linked upto sterndrives?
RossM is offline   Reply With Quote
Old 20-02-2007, 02:22 AM   #4
Member
 
Country: England
Location: The Norf
Occupation: hieght's/offshore
Interests: telling the tax man storys/Boating/Chucking money away!
Boat make: None
Engines: Merc efi Drag.
Cruising area: Any

Join Date: Dec 2006
Location: The Norf
Posts: 88
Looks like this is Yamaha's follow up to the xs300?, but surley 5.3 liter's a bit on the large side (Geeee!!) thats over 2 liter's more than the Merc.
Triple Niple is offline   Reply With Quote
Old 20-02-2007, 12:32 PM   #5
Guest
 
Country: U.K.
Location: London
Occupation: Commodity Broker
Interests: Repairing my boat
Boat name: TABOO
Boat make: ******** 25
Engines: Mercury Optimax 225
Cruising area: North Wales

Join Date: Dec 2005
Location: London
Posts: 105
Yam 350 is 804 lbs. Merc 300 is 534 lbs
Smith is offline   Reply With Quote
Old 20-02-2007, 01:01 PM   #6
Registered User
 

Join Date: Mar 2004
Posts: 6,891
That's comparing the opposite ends of the market.

The 300 viagra, a more direct competitor, weighs 635lbs, 0.47hp/lb
The yammie is 0.435hp/lb
And the old favourite honda 225 delivers 0.383hp/lb

So in 4 stroke terms it's fairly competive weight wise.

In a 30' boat with a pair of motors where you're unlikely to worry about the weight difference too much, do you want 600hp or 700?
Matt is offline   Reply With Quote
Old 20-02-2007, 05:47 PM   #7
Registered User
 
The Docta's Avatar
 
Country: UK
Location: Coventry (but from Lee on Solent)
Occupation: Sales Director
Interests: My Boat of course
Boat make: Extreme 21
Engines: Merc V8
Cruising area: Solent

Join Date: Jul 2005
Location: Coventry (but from Lee on Solent)
Posts: 587


I thought my old 3.4L merc was big - That thing looks huge!!

Surley its all about power to weight ratios though even on a big boat. I cant imagine that engine ever being used for any kind of performance application other than on one of those effin big rubber dinghies!
__________________
The Docta
The Docta is offline   Reply With Quote
Old 21-02-2007, 12:44 PM   #8
Registered User
 

Join Date: Mar 2004
Posts: 6,891
I'd quite fancy a pair on a sonic 33 instead of the usual triple 200's.
Would go pretty well with that setup.
Attached Thumbnails
Click image for larger version

Name:	59926100_1.jpg
Views:	166
Size:	52.0 KB
ID:	11689   Click image for larger version

Name:	59926100_5.jpg
Views:	163
Size:	31.4 KB
ID:	11690   Click image for larger version

Name:	59926100_6.jpg
Views:	184
Size:	45.5 KB
ID:	11691  
Matt is offline   Reply With Quote
Old 21-02-2007, 01:40 PM   #9
Registered User
 
RossM's Avatar
 
Boat make: Phantom 23

Join Date: Mar 2006
Posts: 1,693
Send a message via MSN to RossM
niceee! how much do they fetch?
RossM is offline   Reply With Quote
Old 21-02-2007, 03:11 PM   #10
Registered User
 

Join Date: Mar 2004
Posts: 6,891
Not sure. That was the best looking one I ever found, was in 2003 when I bought the formula instead. IIRC was about $30K but the vendor was an idiot - I sent him a mail asking for more details, 1st line of his response - "SEND MONEY".

With triple 200's they run about 62mph and burn 60GPH - but the cabin is HUGE.
Matt is offline   Reply With Quote
Old 21-02-2007, 05:08 PM   #11
Registered User
 
littlenige's Avatar
 
Country: Spain

Join Date: Sep 2005
Posts: 1,726
Looks like something out of Star Wars!! Or something you´d see 8 of on the back of a Crompton MArine RIB....
littlenige is offline   Reply With Quote
Old 21-02-2007, 06:22 PM   #12
Registered User
 
RossM's Avatar
 
Boat make: Phantom 23

Join Date: Mar 2006
Posts: 1,693
Send a message via MSN to RossM
Quote:
Originally Posted by Matt View Post
Not sure. That was the best looking one I ever found, was in 2003 when I bought the formula instead. IIRC was about $30K but the vendor was an idiot - I sent him a mail asking for more details, 1st line of his response - "SEND MONEY".

With triple 200's they run about 62mph and burn 60GPH - but the cabin is HUGE.
would 2x300 hp engines be faster? due to being less weight, less drag etc?
also would the burn less fuel?

how much fuel does ur boat burn at 50ish mph and at wot?
RossM is offline   Reply With Quote
Old 21-02-2007, 06:27 PM   #13
Registered User
 

Join Date: Mar 2004
Posts: 6,891
It guess it's be a bit quicker, plus it'd handle better.
But twin 350's would be better.
What about triple 350's.


I dunno how much it burns at 50. I always reckoned on 1mpg at 62ish & 3mpg at 33 ish.
Matt is offline   Reply With Quote
Old 22-02-2007, 10:13 PM   #14
Moderator
 
Mike Lloyd's Avatar
 
Country: England
Location: Cornwall.
Occupation: Retired.
Interests: Golf & liquid lunches with friends.

Join Date: Mar 2006
Location: Cornwall.
Posts: 2,303
Could this be a possible re-rig going on here for the RB Matt or just fantasy?
Mike Lloyd is offline   Reply With Quote
Old 22-02-2007, 10:20 PM   #15
Registered User
 

Join Date: Mar 2004
Posts: 6,891
Just Fantasy.
Matt is offline   Reply With Quote
Old 22-02-2007, 10:42 PM   #16
Registered User
 
RossM's Avatar
 
Boat make: Phantom 23

Join Date: Mar 2006
Posts: 1,693
Send a message via MSN to RossM
Matt,Doya recon ur boat would be quicker with twin 355's?
RossM is offline   Reply With Quote
Old 22-02-2007, 10:48 PM   #17
Registered User
 

Join Date: Mar 2004
Posts: 6,891
Do I reckon a formula would be quicker with a pair of 350 outboards over inboards? Never really considered it to be honest, but I guess it might since 330hp inboards are a crank optimstic rating and the 350 should be a on the propshaft
__________________

Matt is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Powered by vBadvanced CMPS v3.2.3

All times are GMT +1. The time now is 05:43 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
×