Reply
 
Thread Tools Search this Thread
 
Old 23 March 2012, 11:30   #1
Member
 
Country: UK - Scotland
Make: Bombard Aerotec 380
Length: 3m +
Engine: Twahtzoo 20hp
MMSI: 235906188
Join Date: Jan 2011
Posts: 66
Aerotec 380 transom height mod.

Couple pics to show off new permanent transom riser on my aerotec 380.

Extends transom by 3cm - fancy marine wood with fancy sikoflex and fancy marine screws.

First pic (from previous owner) is wildtype aerotec on her trailer, showing original transom shape. Pic of the riser being fitted and, finally, a pic of the job done and painted - all ready for the west coast in April!

She has a new shiny, slightly higher arse!! Hmm, now I wonder if I could manufacture the same for 'er indoors????


.
Attached Thumbnails
Click image for larger version

Name:	boatontrailor[1].JPG
Views:	325
Size:	34.1 KB
ID:	66446   Click image for larger version

Name:	Transom fitting.jpg
Views:	501
Size:	53.6 KB
ID:	66447   Click image for larger version

Name:	Transom fitted outside.jpg
Views:	474
Size:	39.7 KB
ID:	66448  
__________________

__________________
squiddy is offline   Reply With Quote
Old 23 March 2012, 11:38   #2
Member
 
Country: UK - England
Town: Dorset & Hants
Boat name: Streaker/Orange
Make: Avon/Ribcraft
Length: 4m +
Engine: 50Yam/25 Mariner
Join Date: Apr 2007
Posts: 5,551
Very nice job - will be doing the same to mine in the next few weeks. I'll just have to out up with lots of spray tomorrow ..been and filled the petrol tank and got more this afternoon - roll on 5 pm !!
__________________

__________________
PeterM is offline   Reply With Quote
Old 23 March 2012, 11:42   #3
Member
 
Country: UK - Scotland
Make: Bombard Aerotec 380
Length: 3m +
Engine: Twahtzoo 20hp
MMSI: 235906188
Join Date: Jan 2011
Posts: 66
Quote:
Originally Posted by PeterM View Post
Very nice job - will be doing the same to mine in the next few weeks. I'll just have to out up with lots of spray tomorrow ..been and filled the petrol tank and got more this afternoon - roll on 5 pm !!
Thank you. Sounds good , just chuck a block of wood in - until you do the permanent modding. Have fun!!!!!!

Do you happen to know how much you are raising your transom for your merc 25hp??

Just interested to know what heights required for other engines.

squiddy
__________________
squiddy is offline   Reply With Quote
Old 23 March 2012, 12:51   #4
Member
 
Country: UK - England
Town: Dorset & Hants
Boat name: Streaker/Orange
Make: Avon/Ribcraft
Length: 4m +
Engine: 50Yam/25 Mariner
Join Date: Apr 2007
Posts: 5,551
Between 2-3 cm seems to give the best results to reduce the waterfall over the transom so I start at 2 and spend an ahour or two with a few differant sized blocks before commiting. So far when I've run it fast I just pull the bungs so the water comes in and goes straight out again.

I probably wont be as well finished as yours - just raise the transom pads inside and out and block the middle gap with a bonded & screwed in bit of ply - suitably painted black.
__________________
PeterM is offline   Reply With Quote
Old 23 March 2012, 14:05   #5
Member
 
Country: UK - England
Town: Bristol
Make: Ribcraft
Length: 5m +
Engine: Yamaha
Join Date: May 2006
Posts: 4,194
looks great.. Heading to salcombe tomorrow so lookin forward to trying out the new bathtub!!
__________________
matt h is offline   Reply With Quote
Old 23 March 2012, 18:23   #6
Member
 
Country: UK - England
Make: Bombard Aerotec
Length: 3m +
Engine: Mariner 25hp
Join Date: May 2011
Posts: 23
I tried various size blocks on my 380 and it improved the spray but did not fully resolve it, but the prop is more prone to cavitation the higher it is. Courtesy of Mrs Bongy, I then tried to put a piece of pipe lagging in between the clamp brackets at the top of the transom and it totally resolved it by blocking the water path. I then lowered the outboard back to its standard condition with the lagging in place and still no spray. The lagging stays attached to the engine when removed so it's no hassle.
__________________
davenport5 is offline   Reply With Quote
Old 24 March 2012, 18:35   #7
Member
 
Country: UK - England
Town: Dorset & Hants
Boat name: Streaker/Orange
Make: Avon/Ribcraft
Length: 4m +
Engine: 50Yam/25 Mariner
Join Date: Apr 2007
Posts: 5,551
Quote:
Originally Posted by matt h View Post
looks great.. Heading to salcombe tomorrow so lookin forward to trying out the new bathtub!!
test went well I think !
Attached Thumbnails
Click image for larger version

Name:	P3240003.jpg
Views:	254
Size:	278.4 KB
ID:	66495  
__________________
PeterM is offline   Reply With Quote
Old 25 March 2012, 20:05   #8
Member
 
Country: UK - Scotland
Make: Bombard Aerotec 380
Length: 3m +
Engine: Twahtzoo 20hp
MMSI: 235906188
Join Date: Jan 2011
Posts: 66
Quote:
Originally Posted by PeterM View Post
test went well I think !
Nice one! Did you get it down to 0.5% splashback?

Davenport5, I stuck some cunning spray deflectors on the engine - these along with the raised transom do the job nicely. Wouldn't want to raise the engine another cm though.
__________________
squiddy is offline   Reply With Quote
Old 26 March 2012, 14:19   #9
Member
 
Country: UK - England
Town: stockport
Length: 3m +
Join Date: Apr 2009
Posts: 48
hi, any pics of these spray deflectors please, i've been suffering the same problem with my aerotec 380 and 18hp tohatsu. raised the motor 30mm and its more or less solved the problem, but still getting that little bit of water between the transom clamps. cheers
__________________
uny1965 is offline   Reply With Quote
Old 26 March 2012, 14:21   #10
Member
 
Country: UK - England
Town: Dorset & Hants
Boat name: Streaker/Orange
Make: Avon/Ribcraft
Length: 4m +
Engine: 50Yam/25 Mariner
Join Date: Apr 2007
Posts: 5,551
Quote:
Originally Posted by uny1965 View Post
hi, any pics of these spray deflectors please, i've been suffering the same problem with my aerotec 380 and 18hp tohatsu. raised the motor 30mm and its more or less solved the problem, but still getting that little bit of water between the transom clamps. cheers
If the engine raise works then I think with some pipe lagging problem solved ??
__________________

__________________
PeterM 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 08:45.


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