Reply
 
Thread Tools Search this Thread
 
Old 14 April 2015, 14:01   #1
Member
 
Country: UK - Channel Islands
Town: St helier jersey
Make: Avon searider 5.4
Length: 5m +
Engine: Twin 60hp mariners
Join Date: Apr 2015
Posts: 17
Avon SR. 5.4 rebuild

Hi Guys
I have my self a Avon sr 5.4 which I have completely revamping I have sunk a new custom built 123 ltr fuel tank, new console redoing the tubes with hypalon paint etc. I have redone all the seems on the tubes as they were looking tatty and putting a new strafing around the tubes. I have run run all cables under the deck with new hydraulic steering and electrics.
The one thing that I am doing is putting twin 60hp Mariners on her the year of both engines is 97 I have cut the transom wider to make room for both engines and have taken note of the weight and know I am 20 kg over the recommend working transom load which I can't see being an issue as I have my tank up front which weights in at 125kg full. If any one has done this befor or has any information regarding what I have done will be great to hear from you.
Here is some photos of where I'm up to and befor and after
Thanks
Nick
__________________

__________________
nckalderson is offline   Reply With Quote
Old 14 April 2015, 14:07   #2
Member
 
Country: UK - Channel Islands
Town: St helier jersey
Make: Avon searider 5.4
Length: 5m +
Engine: Twin 60hp mariners
Join Date: Apr 2015
Posts: 17
Avon SR. 5.4 rebuild

Hi Guys
I have my self a Avon sr 5.4 which I have completely revamping I have sunk a new custom built 123 ltr fuel tank, new console redoing the tubes with hypalon paint etc. I have redone all the seems on the tubes as they were looking tatty and putting a new strafing around the tubes. I have run run all cables under the deck with new hydraulic steering and electrics.
The one thing that I am doing is putting twin 60hp Mariners on her the year of both engines is 97 I have cut the transom wider to make room for both engines and have taken note of the weight and know I am 20 kg over the recommend working transom load which I can't see being an issue as I have my tank up front which weights in at 125kg full. If any one has done this befor or has any information regarding what I have done will be great to hear from you.
Here is some photos of where I'm up to and befor and after
Thanks
Nick
Attached Thumbnails
Click image for larger version

Name:	image.jpg
Views:	348
Size:	127.7 KB
ID:	104454  
__________________

__________________
nckalderson is offline   Reply With Quote
Old 14 April 2015, 16:46   #3
Member
 
Country: UK - Channel Islands
Town: St helier jersey
Make: Avon searider 5.4
Length: 5m +
Engine: Twin 60hp mariners
Join Date: Apr 2015
Posts: 17
Avon searider 5.4 project

Hi Guys
I have my self a Avon sr 5.4 which I am completely revamping I have sunk a new custom built 123 ltr fuel tank, new console redoing the tubes with hypalon paint etc. I have redone all the seems on the tubes as they were looking tatty and putting a new strafing around the tubes. I have run run all cables under the deck with new hydraulic steering and electrics.
The one thing that I am doing is putting twin 60hp Mariners on her the year of both engines is 97 I have cut the transom wider to make room for both engines and have taken note of the weight and know I am 20 kg over the recommend working transom load which I can't see being an issue as I have my tank up front which weights in at 125kg full. If any one has done this befor or has any information regarding what I have done will be great to hear from you.
I will upload photos when I can work it out.

Thanks
Nick
Attached Thumbnails
Click image for larger version
__________________
nckalderson is offline   Reply With Quote
Old 14 April 2015, 18:37   #4
Member
 
Country: UK - England
Town: Royal Wootton Bassett
Length: 8m +
Engine: 250
Join Date: Jul 2008
Posts: 8,020
Dude, I'm sorry to say this but I think you have made some big mistakes

The twin set up on a 5.4 goes on the top of the transom, not lower down so there was no need to cut the transom. Now with the extra weight you will just flood the boat, especially in reverse. And I would have thought that the engines will be at the wrong height.

There was another pic of the deck that had been cut down the middle, also not good dude, there is air tanks there.

The engines are over powered the tank is too far forward.

Sorry to bring bad news but someone has to say before you go any further.
__________________
whisper is offline   Reply With Quote
Old 15 April 2015, 10:57   #5
Member
 
Country: UK - Channel Islands
Town: St helier jersey
Make: Avon searider 5.4
Length: 5m +
Engine: Twin 60hp mariners
Join Date: Apr 2015
Posts: 17
Hi mate thanks for you reply in a way I disagree as I have not cut the transom down only made it wider.
With regards to the air pockets I have blocked up the hull so it's a water tight compartment and will be filling with expanding foam.
The fuel tank fully loaded comes in at 123 kg plus my weight of 80kg plus a passenger. I respect what your saying but with the extra bouncy with the hull not filling with water I think that will be enough compensation for the extra weight if my calculations are right I'm only 20 kg over which is not a massive overload. I had a friend which had the old type Yamaha 140 v4 which is a massive load.

Thanks
Nick
__________________
nckalderson is offline   Reply With Quote
Old 15 April 2015, 11:02   #6
Member
 
biffer's Avatar
 
Country: UK - England
Town: swanwick/hamble
Boat name: stormchaser
Make: custom rib
Length: 8m +
Engine: inboard/diesel
Join Date: Aug 2007
Posts: 3,848
Don't fill it with foam. Just make sure it's watertight
__________________
biffer is offline   Reply With Quote
Old 15 April 2015, 13:02   #7
Member
 
Country: UK - England
Town: Bristol
Make: Ribcraft
Length: 5m +
Engine: Yamaha
Join Date: May 2006
Posts: 4,194
I totally agree with whisper. a SR 5.4 is ideal for up to 125 kgs on its stern, any more and it becomes unbalanced. if you made the transom aperture wider coupled with the extra engine weight you are going to have a VERY wet boat.. the air tanks are under the deck floor about 2.5ft from the rear of the boat. these also strengthen the floor where needed.
20 Kgs over the transom weight is a lot on a narrow beam boat. and def on a 5.4.
__________________
Member of S.A.B.S. West Country Division
matt h is offline   Reply With Quote
Old 15 April 2015, 15:01   #8
Member
 
Country: UK - Channel Islands
Town: St helier jersey
Make: Avon searider 5.4
Length: 5m +
Engine: Twin 60hp mariners
Join Date: Apr 2015
Posts: 17
Ok thanks guys project is to far to start changing it so there will only be one way to find out. And the hull is 100% water tight will keep you posted thanks
__________________
nckalderson is offline   Reply With Quote
Old 16 January 2016, 16:13   #9
Member
 
Country: UK - Channel Islands
Town: St helier jersey
Make: Avon searider 5.4
Length: 5m +
Engine: Twin 60hp mariners
Join Date: Apr 2015
Posts: 17
Click image for larger version

Name:	ImageUploadedByRIB Net1452978524.778516.jpg
Views:	192
Size:	55.7 KB
ID:	110372Click image for larger version

Name:	ImageUploadedByRIB Net1452978622.329647.jpg
Views:	191
Size:	24.0 KB
ID:	110373Click image for larger version

Name:	ImageUploadedByRIB Net1452978668.516110.jpg
Views:	198
Size:	28.0 KB
ID:	110374Click image for larger version

Name:	ImageUploadedByRIB Net1452978688.767436.jpg
Views:	204
Size:	22.8 KB
ID:	110375Click image for larger version

Name:	ImageUploadedByRIB Net1452978712.486712.jpg
Views:	209
Size:	31.6 KB
ID:	110378Click image for larger version

Name:	ImageUploadedByRIB Net1452978733.986284.jpg
Views:	202
Size:	22.4 KB
ID:	110379
__________________
nckalderson is offline   Reply With Quote
Old 18 January 2016, 05:15   #10
Member
 
Country: UK - England
Town: Enfield/Switzerland
Boat name: Zonneschijn II/Vixen
Make: Shakespeare/Avon
Length: 7m +
Engine: Evin' 175 DI /Yam 90
MMSI: 235055605
Join Date: May 2006
Posts: 1,418
Whats with the plate on the transom? Did you realise Whisper and Matt were right? How did you build it back up underneath?
__________________

__________________
Neil Harvey is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 10:26.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.