Like Tree0Likes

Ordered My New Boat - 300x or 2.5 offshore- need advice

Reply
Old 09-08-2003, 08:20 AM
  #31
Registered
Thread Starter
 
Join Date: Apr 2002
Location: Boca Raton, FL
My Boats: 38 Jupiter CC, Miss GEICO
Posts: 2,112
Default This is great information!

So big problems with your 300x's no problems with 300Pro's are they the same HP?

Why so many powerheads? high rpm's ,rough water or avg HP boating?

can you get extended warranties on 2.5's or 300's.

Guy's these seem like as much trouble as Big blocks.

Maybe I should put some 500's in the thing.

mcvatt: My friend is getting 108 in his 00' 30ft spectre. We are going to be setting it up to run a little faster with a goal of 110.
sounds like an awsome stereo.

Tom: Now you know i would be very interested in a Velocity. But I figure I get one when I'm in my 70's and its time to slow down...........dooooooh!!!! just kidding, still like the kitty!

Maximus
Maximus is offline  
Reply With Quote
Old 09-08-2003, 12:28 PM
  #32
Registered
 
Join Date: Nov 2000
Location: NJ
Posts: 560
Default Hi Mike,

I was running OK, put another gear case on, this one seems OK, no housing cracks, but had another P/H problem, not sure what let go yet, more then likely a rod. We will see, The boat runs great when all Cyl's are healthy.
Maximus. why the P/H problems?? I don't know, the Promax's were different technology. The X's are optimax technology, I think that might make the difference. The X's definitely have more HP, I took a pair of Promax's off, and put x's right back on the 32' Skater, boat ran 5-6 mph better, 6 mph might not seem like a lot, but it must translate to 60-75 hp more for the both motors. I am not sure of the HP,s of the promax's or the X's everyone seems to have different numbers, but same boat, same props, 500 rpm more = 30 to 35 HP, per motor??? IMHO. Extended Warranty? Mercury offers one additional year at a cost of $2,500 to $2,800 per motor, I think that was the price. In the North East 2 or 3 month season, pretty expensive 3 months. Powerheads are more though. 525 HP,s now you are getting the Picture. or (2) 2.5's 15" mid sections would be cool. I am not sure if the 15" will fit, maybe not,

Philip
Philip is offline  
Reply With Quote
Old 09-08-2003, 08:16 PM
  #33
Registered
 
Join Date: Apr 2003
Location: Punta Gorda
My Boats: new to me 388 slingshot 2000 velocity 390 sold 2005 390 velocity sold 2001 390 velocity sold 260 velocity sold 320 velocity sold 30ft velocity sold vr1 velocity sold 35 Cigarette sold. 34 phantom cur.
Posts: 1,789
Default

Im shure it will be one bat cat. Good luck I want a ride.
Velocity Tom is offline  
Reply With Quote
Old 09-08-2003, 09:07 PM
  #34
Registered
 
eMotiondriver's Avatar
 
Join Date: Mar 2001
Location: Rosedale,MD
My Boats: Pontoon 2002 Crestliner
Posts: 891
Default

I'm switching to Yamaha they will back their stuff up with warrenties
eMotiondriver is offline  
Reply With Quote
Old 09-08-2003, 11:28 PM
  #35
Registered
 
Join Date: Dec 2002
Location: chesapeake bay md
My Boats: 30 motion ob
Posts: 959
Default

Hell Doug you could break a concrete block with a feather!
Maybe you could something from John Deere that would work
mmwalters is offline  
Reply With Quote
Old 09-09-2003, 09:24 AM
  #36
Registered
Thread Starter
 
Join Date: Apr 2002
Location: Boca Raton, FL
My Boats: 38 Jupiter CC, Miss GEICO
Posts: 2,112
Default you guys crack me up

I'm learning a lot.

Ok , how long until the first problems start to arise?

MMwalt, What speed did you say yur getting out of the 2,5's. are they 'Smokey'

Jack plates?? recomend?

Phillip, sounds like the promaxs were very reliable.

Why dosn't Yamaha make HP? I undersand they are very reliable.

Tom, You are always welcome on my boat. Isn't it about time you switched to a cat?

Maximus
Maximus is offline  
Reply With Quote
Old 09-09-2003, 11:17 AM
  #37
Registered
 
Brad Zastrow's Avatar
 
Join Date: Jun 2001
Location: McHenry, Illinois
Posts: 2,244
Default

Have you considered triple 2.5's? My 30' Motion with triples is a rocket. 114 on GPS. Would accelerate like a drag boat.
Brad Zastrow is offline  
Reply With Quote
Old 09-09-2003, 12:06 PM
  #38
ClockworkOrange
Guest
 
Posts: n/a
Default After reading........

I will be looking for a pair of motors for a 30 Spectre in the next month.
So I will be going through the same deal. Yamaha is releasing their 300,s this fall. I have already riddin in a 33 Hydra-sport w/ twin 300,s.. Not bad but I would want the 20" V-max version w/ low water pickups and nose cones. 5 year warr.

I have read all the posts and must disagree w/ most of the statments made in regards to the 300 vs. X. All I expeirenced has been the completely diffrent. The older 300,s were not great performance motor due to the design of the oil gear. Constant runs at high rpms were causing them to fail which resulted in fried powerheads. I have rebuilt many a 3.0 litre. I,d say out of 10/ 6 were oil gear failures. I have not seen the same problem w/ the X,s. However , The HPDI Yamaha,s have had their share with fouling plugs at low RPM,s. Solution there is easy, Run the crap out of it. Hard to foul a plug at 6000 rpm. Who knows.....

Last edited by ClockworkOrange; 09-09-2003 at 12:21 PM.
 
Reply With Quote
Old 09-09-2003, 02:00 PM
  #39
Registered
 
Join Date: Dec 2002
Location: chesapeake bay md
My Boats: 30 motion ob
Posts: 959
Default

Maximus I have 300promaxs. With fuel and 4 people it will run 104mph every day. best speed so far has been 109.2 with 2people and 1/4 fuel. Cruise at 4000rpm is 63mph 5000rpm is around 80mph
mmwalters is offline  
Reply With Quote
Old 09-09-2003, 03:21 PM
  #40
Firewalker
Guest
 
Posts: n/a
Default

2.5's will give better response and reliability. The first 280 mercs has a few piston and bearing problems, that have long been solved, the 300X......................
A properly set up 280 is a VERY civil motor, more so than the 300X. I hear people rave about the top end legs that the 300X has, but reality is, how often can you stretch it out for those few extra MPH?.

If the oil mixing thing is a problem (it really is not an issue), G-Force Technologies makes a retrofit package that will convert 2.5 to electronic oil injection.......just like the 300X.

Gearcases, can and should be shifted while the motor is running, hell my 350 hp 10000 rpm 2.5 drag (modified) shifts like a 150, and idles at 800 rpm. The only gearcase that should not be shifted with the motor running is the XR6........and you guys would never ever use one.
The new fat shaft will never break........and they are the same on both motors.

Add to the fact that most of the 2.5 that blow are repairable, the 300x's tray and saw themselves in half.....and I have seen a lot.

And finally the "ratcheting dog" is the ability of the prop to freewheel while it is not under power, next time your boat is on the trailer put the motor in gear and spin the prop by hand, it won't turn one way and will "ratchet" (a clicking noise) the other

I hope that helps.

RT
 
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
JIMKID Motorsports
Skater
14
12-22-2007 10:16 AM
bobl
Nordic
3
09-26-2007 06:26 PM
DollaBill
General Boating Discussion
36
01-07-2006 10:52 AM
General Boating Discussion
3
11-28-2005 07:48 PM
J Berman
General Boating Discussion
6
02-21-2002 07:57 PM



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 On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 02:19 PM.


Copyright 2011 OffShoreOnly. All rights reserved.