Thread Tools Search this Thread
Old 12 April 2012, 22:33   #1
Country: Ireland
Town: ireland
Make: yam 480r
Length: 4m +
Engine: yamaha autolube 40
Join Date: Dec 2011
Posts: 33
transom flaps

can anybody tell me how these work
do they just let water flow out and not in?
or do i need elephant trunks?
Attached Thumbnails
Click image for larger version

Name:	outboard 095.jpg
Views:	187
Size:	106.7 KB
ID:	67112   Click image for larger version

Name:	outboard 096.jpg
Views:	172
Size:	161.4 KB
ID:	67113  

eoin1981 is offline   Reply With Quote
Old 12 April 2012, 23:04   #2
Country: USA
Town: Seattle
Boat name: Water Dog
Make: Polaris
Length: 4m +
Engine: Yamaha 60hp
Join Date: Apr 2007
Posts: 1,152
There's a one way rubber flap in there. They don't drain as well as a similar sized trunk, as there's a "X" in the middle supporting the flap. Mine is forever clogging up with dog hair so it leaks in almost as much as it drains.

They work, sort of. They won't drain a good sized wave though. Those look like they are centered on the transom so unless you have twin engines it will be hard to replace them with a trunk. I would just keep them and decide if they work for you.

captnjack is offline   Reply With Quote
Old 12 April 2012, 23:14   #3
Dhf's Avatar
Country: UK - Wales
Length: no boat
Join Date: Jan 2012
Posts: 1,012
Looks like you need 2 expanding bungs there i'd say, I have one similar on my transom, They insert from inside the boat and when you puch the expanding bung lever it causes them to lock in place through expantion, They can also be taken out whilst going ahead allowing a bit of green water to flow out, Personally I think I preffer the elephant trunk idea, But i'll make do with other for now.
Dhf is offline   Reply With Quote
Old 13 April 2012, 12:24   #4
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,650
They work (slowly) in theory, but first sign of any grit / weed / anything solid they will jam open.

Had them on a SIB. Phrases involviong chocolate teapots came to mind.

As said above, expandable bung in them & a trunk would be ideal (then if the boat is stored ashore or being towed, you can take the bungs out to get rid of the rainwater)
9D280 is offline   Reply With Quote

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

All times are GMT. The time now is 23:08.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.