Like Tree0Likes

Anybody out there with Merc 2.5s

Reply
Old 10-02-2002, 04:07 PM
  #1
Gold Member
Gold Member
Thread Starter
 
Join Date: Nov 2000
Location: Fl
Posts: 89
Default Anybody out there with Merc 2.5s

Does anyone use these motors other than racers?
Expo is offline  
Reply With Quote
Old 10-02-2002, 04:29 PM
  #2
T2x
Allergic to Nonsense
Platinum Member
 
T2x's Avatar
 
Join Date: Aug 2001
Location: Granite Quarry, NC
My Boats: 1966 !8' Switzer Wing "Miss Diablo" 1968 Switzer Wing "Dust'n the Wind 2",, 1960 Powercat 15C , 1977 17' Molinari w/Evinrude CCC
Posts: 5,004
Default

I do.........I have them on my 28 Skater....race version 2.5 -300's @8200 RPM

They burn 30 gals/hr....idle like kittens and at present have about 100 hours on each motor.

I prefer them to the 300x's in terms of weight, docking and maneuvering at idle, powerhead life and behaviour.

T2x
T2x is offline  
Reply With Quote
Old 10-02-2002, 05:22 PM
  #3
Registered
 
Join Date: Sep 2001
Posts: 75
Default

I have 2.5 carb motors on 24' lightning Express Cat. I have had good luck and I feel they are more forgiving than the EFI versoins.
I have run EFI's and 2.4 Bridgeports as well. They do use the fuel at high RPM's but compared to a couple of thirsty BBC'c they are not bad.
skat is offline  
Reply With Quote
Old 10-02-2002, 08:53 PM
  #4
Registered
 
dkwestern's Avatar
 
Join Date: Mar 2002
Location: Lake St. Clair
My Boats: 33' Powerplay triple 2.5's
Posts: 2,973
Default

Hey Skat, Anything else you can tell me about the 2.5 carbs. I am in negotiations right now on a boat with triple 2.5 carbs. It is a vee bottom, so i know it has diff. fuel usage, but how does your MPG or GPH compare to EFI's. Anything else you can tell me would be great too. Thanks.
dkwestern is offline  
Reply With Quote
Old 10-02-2002, 09:44 PM
  #5
Registered
 
Join Date: Sep 2001
Posts: 75
Default

These impressions are from personal usage only and I don't have data to back them up. It is easier to work on the carb version and problems seem easier to diagnose. They seem to be more forgiving to slight fuel contamination and oil mix/ plug fouling. My EFI motors had fuels brands they liked and did not like, carbs not as big a deal. You are giving up HP to the EFI's but the carbs will turn the RPM'S and lack the rev limiter (this can be a bad thing).
I don't think there is any doubt the newer 2.5 EFI's are awsome and if I was buying brand new I would love to have them.
I have 2.4 BP EFI parts and had little success w/ 2.4 EFI motors.
skat is offline  
Reply With Quote
Old 10-02-2002, 10:00 PM
  #6
OSO Content Provider
Commercial Member
 
SHARKEY-IMAGES's Avatar
 
Join Date: Jun 2001
Location: Sharkey-Images.com
Posts: 19,673
Default

I have a pair of 1997's on my 28 Checkmate. Very pleased with their performance all year. Now if I can only keep the props from backing off...
Attached Thumbnails
Anybody out there with Merc 2.5s-28survey4.jpg  
__________________
www.TimSharkey.com/

Digital Photography & Video one BYTE at a time !
SHARKEY-IMAGES is offline  
Reply With Quote
Old 10-02-2002, 10:05 PM
  #7
Charter Member #232
Charter Member
 
Audiofn's Avatar
 
Join Date: Oct 2000
Location: Carlisle, MA USA
My Boats: 1979 Formula 302, 99 Formula 353, 81 Donzi 18 2+3 with 454
Posts: 18,379
Default

Sharkey we had that same problem on the race boat and found the solution to be use brand new thrust washers EVERY time we took off the props and Torque them on not just tighten them by hand.

Jon
__________________
Put your best foot forward!
Audiofn is offline  
Reply With Quote
Old 10-03-2002, 12:34 AM
  #8
OSO Content Provider
Commercial Member
 
SHARKEY-IMAGES's Avatar
 
Join Date: Jun 2001
Location: Sharkey-Images.com
Posts: 19,673
Default

@ $40.00 a pair, that could get quite expensive It doesn't seem to be a problem when I have the family out...but when I am running solo that's when I'll start to run it the hardest
__________________
www.TimSharkey.com/

Digital Photography & Video one BYTE at a time !
SHARKEY-IMAGES is offline  
Reply With Quote
Old 10-03-2002, 08:12 AM
  #9
DanL
Guest
 
Posts: n/a
Default

we were losing intermediates and lowers constantly running these on the Skate race boat. I was over-propped. the bearing carriers would jump out on re-entry from the extra load from the bigger prop. They were offshore lowers. Broken prop shafts were common also. Motrs were flawless. Only change the powerhead to midsection gasket and spark plugs in 2 full sesons. Went thru 5 lowers.
 
Reply With Quote
Old 10-04-2002, 01:38 PM
  #10
Registered
 
charlie 28's Avatar
 
Join Date: Apr 2002
Location: BayShore,Long Island N.y.
My Boats: '92 28 Skater
Posts: 49
Default

I have a pair 280's offshore race on my 28 skater I put 130 hours on in two seasons. took the motors apart changed piston,rings bearings.the pistons looked like they had 10 hours on them. just to be on the safe side i changed them.The 280's have so much snap i wouldnt use anything else....
charlie 28 is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
shw-n-go h20
General Q & A
8
07-29-2008 11:05 AM
Magic34
General Boating Discussion
28
10-24-2007 06:05 PM
dfealy
General Q & A
11
09-21-2007 05:07 AM
superwrench0166
General Q & A
1
01-06-2007 09:59 AM
timucin
General Q & A
4
11-03-2002 08:29 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 12:15 PM.


Copyright 2011 OffShoreOnly. All rights reserved.