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Old 25 March 2010, 14:14   #1
Country: Ireland
Length: 5m +
Join Date: Nov 2006
Posts: 90
doel fins

not sure if that is the right spelling but are doel fins any good ? ,and if so why dont the engine already have them when it is manufactured

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Old 25 March 2010, 14:27   #2
Country: UK - England
Town: Midlands
Make: Nautique
Length: 6m +
Engine: PCM 5.7l
Join Date: Oct 2003
Posts: 1,082
Great if your boats a bit bum heavy, don't come as standard because they add drag.

We put them on, lost a knot or 2 but the boat rides massively better


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Old 26 March 2010, 04:10   #3
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Cookee's Avatar
Country: UK - England
Town: Salcombe, Devon, UK
Boat name: BananaShark
Make: BananaShark
Length: 10m +
Engine: 2xYanmar 260 diesels
Join Date: Mar 2003
Posts: 4,225
They stop porpoising as well, but beware they have had adverse effects on some SIBs - do a search on here!
Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
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Old 26 March 2010, 05:56   #4
Country: UK - England
Town: NW& wherever the boat is!
Boat name: depends on m'mood!
Make: Humbers/15-24m cats
Length: 6m +
Engine: etec130/big volvos
MMSI: many and various
Join Date: Nov 2001
Posts: 1,815
we had them already fitted on a SR4/50 yam we bought-all seemed ok but of course never tried boat without them so no comparison available. On the other hand we out some on a 15ft fast fishing boat for cosmetic reasons the boat was manual trim and needed to be trimmed out a bit to lift the weight of the cuddy, batteries, fishing weights and m'wallet. There was no upside as a result but the downside was the tail end would try to dive at times under the influence of the fins-- and now I had 4 ***** holes in the cavitation plate!
Dave M
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