Classic SeaCraft Community  

Go Back   Classic SeaCraft Community > Recovered Threads
FAQ Community Calendar Today's Posts Search

Notices

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 08-20-2014, 01:59 PM
Bigshrimpin Bigshrimpin is offline
Senior Member
 
Join Date: Dec 2002
Location: Onset, MA
Posts: 2,712
Default 150 Mercury 4 stroke on a 23 seacraft

https://www.mercurymarine.com/en/us/...units=imperial

This got me thinking : )
Reply With Quote
  #2  
Old 08-20-2014, 02:20 PM
flyingfrizzle flyingfrizzle is offline
Senior Member
 
Join Date: Sep 2012
Location: Eastern NC
Posts: 1,653
Default

Quote:
Originally Posted by Bigshrimpin View Post
Those #'s are impressive for a boat that large
__________________
Current SeaCraft projects:
68 27' SeaCraft Race boat
71 20' SeaCraft CC sf
73 23' SeaCraft CC sf
74 20' SeaCraft Sceptre
74 20' SeaCraft CC sf
Reply With Quote
  #3  
Old 08-20-2014, 04:01 PM
thehermit thehermit is offline
Senior Member
 
Join Date: Aug 2006
Location: Chatham, MA
Posts: 777
Default

Quote:
Originally Posted by Bigshrimpin View Post
That you should strap 2 of these on a Shrimpco bracket ?
__________________
__________________________________________________ ________________
1974 23SF
Reply With Quote
  #4  
Old 08-22-2014, 12:14 AM
McGillicuddy McGillicuddy is offline
Senior Member
 
Join Date: Dec 2007
Location: 32.77 N, 117.01 W
Posts: 2,184
Default

Quote:
Originally Posted by DonV View Post
Yeah....no kidding!!!!

Besides the performance numbers are with a 15 pitch prop which will really limit high speed. 38 mph at WOT is nothing to brag about. I like the performance curve graph, as you increase the RPMs by 600 @ 3000 to 3600 your MPG goes up. I wish my truck would do that as I increase the RPMs.
At that point the hull has just gotten on plane thus the improved fuel economy. I'd like to see more motors tested on the sailfish hulls, closer to home... Tired of everybody testing on carolina skiffs and 19 foot tinnies.
__________________
there's no such thing as normal anymore...
Reply With Quote
  #5  
Old 08-22-2014, 12:14 PM
Bigshrimpin Bigshrimpin is offline
Senior Member
 
Join Date: Dec 2002
Location: Onset, MA
Posts: 2,712
Default

My 23 has a top speed of approx 39mph (+/- 2mph with load/conditions) . . . 38.6 isn't too much of a loss. The conditions usually dictate your cruising speed anyways, so 95% of the time that is enough speed. The Merc 150 3.0L has almost as much displacement as the first generation yamaha 4 strokes 200 - 250hp (3.3L) and Honda 225/250hp (3.5L). It's only 4 cylinders, but it sure seems like it'll do the job.
Reply With Quote
  #6  
Old 08-22-2014, 04:25 PM
McGillicuddy McGillicuddy is offline
Senior Member
 
Join Date: Dec 2007
Location: 32.77 N, 117.01 W
Posts: 2,184
Default

Big, are you still running that 3L 250 efi? or did you go back to the old school lightweights?
__________________
there's no such thing as normal anymore...
Reply With Quote
  #7  
Old 08-23-2014, 03:25 PM
doodlebug doodlebug is offline
Senior Member
 
Join Date: Dec 2006
Location: tampa fl
Posts: 137
Default

Does anyone notice that mercury has removed the optimax
Test data for the 135 thru 175 2.5L engines.
The 21 Seacraft with a 150 opti had a 5 mpg cruise and
A top end in the low 40's looks like mercury did not want
People to compare old with new.
__________________
1979 23 SCEPTRE TWIN 150 Opti's/GAUSE BUILT BRACKET
Reply With Quote
  #8  
Old 08-26-2014, 01:06 PM
RidgeRunner RidgeRunner is offline
Member
 
Join Date: Jan 2012
Location: Lakeland,FL
Posts: 57
Default

Redoing their website
Reply With Quote
  #9  
Old 08-27-2014, 09:53 AM
Bigshrimpin Bigshrimpin is offline
Senior Member
 
Join Date: Dec 2002
Location: Onset, MA
Posts: 2,712
Default

Quote:
Originally Posted by McGillicuddy View Post
Big, are you still running that 3L 250 efi? or did you go back to the old school lightweights?
Running the old 2.4's . . . saving the 250EFI for the 25.
Reply With Quote
  #10  
Old 08-27-2014, 02:24 PM
Sullivan21 Sullivan21 is offline
Senior Member
 
Join Date: Dec 2011
Location: Berlin/Westbrook, CT
Posts: 220
Default

Those are impressive figures! 3.5 MPG is unreal! My hull runs about 45mph but i rarely get up over 40 so who cares, run at 26mph sipping fuel, I have heard all good things about the new Merc 150 4 stroke too!
Reply With Quote
Reply


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

Forum Jump


All times are GMT -4. The time now is 06:49 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
All original content © 2003-2013 ClassicSeacraft