Classic SeaCraft Community  

Go Back   Classic SeaCraft Community > General Discussion > Performance

Notices

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 02-26-2013, 08:14 PM
fly4navy fly4navy is offline
Senior Member
 
Join Date: Oct 2012
Location: East Orleans Cape Cod
Posts: 164
Default 1974 20 Ft CC SF transom

Just curious,

Has everyone who has repowered with a 4 stroke engine at 115 h.p. or above, gone ahead and raised the transom on their boat?
I have a new (to me) original 1974 20 ft. CC SF and am having installed a 115 h.p. E-TEC this week.
I just don't see how the low transom height of my vintage year Seacraft can handle the weight of a 4 stroke (particularly 140 h.p. and above) without really getting the waterline close to the top. I am not planing on raising my transom unless I run into a structural need to replace it.
Has this created an operational or safety issue for anyone? I assume the boat was designed the way it was, with this issue having been considered.

Thanks for any input.

Geoff
Reply With Quote
  #2  
Old 02-26-2013, 09:18 PM
Sceptre20 Sceptre20 is offline
Senior Member
 
Join Date: Sep 2011
Location: Oyster river,Chatham Ma./Plymouth
Posts: 137
Default

I had a Yamaha F100 four stroke on my 20' Sceptre with the 20" transom and never had any issue with waqter over the transom but I got one of Hermco's splashwells just in case,and the f100 is a fairly light four stroke
Reply With Quote
  #3  
Old 02-26-2013, 11:04 PM
NoBones NoBones is offline
Pooh Bah
 
Join Date: Apr 2004
Location: Area 442 Somewhere in Florida
Posts: 3,699
Default

Plain and simple....
25 inch motors had not been invented yet in 74....
__________________
See ya, Ken ©
Reply With Quote
  #4  
Old 02-26-2013, 11:15 PM
hugo hugo is offline
Senior Member
 
Join Date: Mar 2008
Location: homestead Fl,
Posts: 261
Default

the reason most of us raise the transom should be self explanitory. i had mine originaly at 25 inches and still didnt like water being so close to coming in the splash well. when my transom failed i was happy to close it in and add a bracket, now its a joy to run around in about any conditions and have peice of mind! i would personaly would not have a 20 with at least a 25 inch transom. remember that these boats were desighned originaly with motors in the 300lbe range and the newer ones with newer power had 25 inch transoms from factory.
Reply With Quote
  #5  
Old 02-27-2013, 02:19 PM
mrobertson mrobertson is offline
Senior Member
 
Join Date: Sep 2008
Posts: 172
Default

115 2 smoker on a 25" transom has never caused me concern. However, i'm always lightly loaded, no T-Top, and a new deck. I fish frequently in choppy waters of the chesapeake bay
Reply With Quote
  #6  
Old 02-27-2013, 04:30 PM
fly4navy fly4navy is offline
Senior Member
 
Join Date: Oct 2012
Location: East Orleans Cape Cod
Posts: 164
Default transom

So MRobertson....did you raise your transom to a 25? Had you had a problem/ or concern with it at 20??

Thanks!


Quote:
Originally Posted by mrobertson View Post
115 2 smoker on a 25" transom has never caused me concern. However, i'm always lightly loaded, no T-Top, and a new deck. I fish frequently in choppy waters of the chesapeake bay
Reply With Quote
  #7  
Old 02-27-2013, 04:53 PM
caper caper is offline
Senior Member
 
Join Date: Nov 2004
Location: Cape Cod
Posts: 258
Default

I have a 2003 2 stroke Johnson 175 on my 1975 20 SF amd have no real concerns about the 20" transom. Moved oil tank and batteries under the console. Boat in Cape Cod Bay and off Marathon in the Keys - never been a problem. Present waterline is very close to original and through deck scuppers work well.
Reply With Quote
  #8  
Old 02-27-2013, 08:09 PM
fly4navy fly4navy is offline
Senior Member
 
Join Date: Oct 2012
Location: East Orleans Cape Cod
Posts: 164
Default Transom

Thanks Caper,


Now thats a useful response!! It has been suggested (by my marina) that 100+ lbs of deadweight in forward storage would/ could be beneficial.

I'm out of Orleans but will be going out of Wellfleet Harbor on occasion this summer



Quote:
Originally Posted by caper View Post
I have a 2003 2 stroke Johnson 175 on my 1975 20 SF amd have no real concerns about the 20" transom. Moved oil tank and batteries under the console. Boat in Cape Cod Bay and off Marathon in the Keys - never been a problem. Present waterline is very close to original and through deck scuppers work well.
Reply With Quote
  #9  
Old 02-27-2013, 09:55 PM
eggsuckindog eggsuckindog is offline
Senior Member
 
Join Date: Mar 2003
Location: Tampa
Posts: 2,354
Default

Move the batts up under the console somewhere and you should be fine, my merc is 415 and no trouble. The previous owner put some 4/5" starboard splash guards on each side ofthe motor and I think they help too

The oil tank can go starboard where the battery usually was, I don't think a 115 being a V4 is that heavy?
__________________
Any way you measure it - dumbass is expensive
Reply With Quote
  #10  
Old 02-27-2013, 11:47 PM
fly4navy fly4navy is offline
Senior Member
 
Join Date: Oct 2012
Location: East Orleans Cape Cod
Posts: 164
Default transom

Thanks.....batts are already under the console and the oil reservoir will go where the batt used to be. Could move that forward also but probably not going to get much in return for that effort.

Appreciate the response!!!!!!
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

Forum Jump


All times are GMT -4. The time now is 06:47 AM.


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