Wedger Posted March 23, 2017 Report Share Posted March 23, 2017 Does anyone use bilge blowers to keep down condensation under / below decks? Seems the recent deterioration below Otter's deck was most likely caused by an epoxy coat on the outside preventing moisture egress. I am advised this is prevented by fitting bilge blower ventilation in these cases and should be routinely fitted, if not already in place. What do you guys know?? Cheers Trev Quote Link to comment Share on other sites More sharing options...
Maverick Martin Posted March 23, 2017 Report Share Posted March 23, 2017 Trevor My boat has bilge blowers that are on all the time the engine is running. Not sure whether their needed on a diesel boat but were fitted as standard when new so guess they are. I think they maybe needed more for getting air into the engine room rather than vacating it. In the winter months I use a dehumidifer to keep the mouldy growths away Wedger and Jim 2 Quote Link to comment Share on other sites More sharing options...
Wedger Posted March 23, 2017 Author Report Share Posted March 23, 2017 Thank you Martin. My particular issue is condensation forming below the sealed deck which has gradually softened the deck by being continuously wet. Quote Link to comment Share on other sites More sharing options...
Jim Posted March 23, 2017 Report Share Posted March 23, 2017 Bloody boats ! Hope you can get it dried out Trev. I suppose it works like air bricks on houses ? ? Jim Wedger 1 Quote Link to comment Share on other sites More sharing options...
Mike Fox Posted March 23, 2017 Report Share Posted March 23, 2017 I have one fitted on Feisty, and was advised to use in hotter climates to aid with cooling. That feels like an absolute load of garbage - the liquid cooling has to be much more effective! Seems the US Coastguard require them to disperse fumes, and reduce risk of explosions: http://www.boatus.com/boatTECH/articles/bilge-blowers.asp Interesting what it says about 4 minutes only needed.... Quote Link to comment Share on other sites More sharing options...
Maverick Martin Posted March 23, 2017 Report Share Posted March 23, 2017 Mike I think you will find the us regulations are in place because more users have petrol boats than over here hence the 4 minutes to clear fumes before starting a sparking engine fisherman1055 and Kingfisher 126 2 Quote Link to comment Share on other sites More sharing options...
Mike Fox Posted March 23, 2017 Report Share Posted March 23, 2017 Ahh, could be Martin, thanks! Quote Link to comment Share on other sites More sharing options...
Steve S Posted March 23, 2017 Report Share Posted March 23, 2017 Tigerfish has a switch in the wheelhouse labeled engine room fan. I can honestly say I have never turned it on. Being a diesel and having a massive amount of air intakes to let the engines breath I could not think why it was needed and showing a total lack of curiosity have never tried (maybe it does nothing ), suspect a regulatory requirement. No help to your question Trev, however, I think i will turn it on, if nothing else to find out if there is a fan, maybe it does something marvelous! I won't hold my breath. Wedger 1 Quote Link to comment Share on other sites More sharing options...
Rob Posted March 24, 2017 Report Share Posted March 24, 2017 Yes, friend of mine who had and has V8 petrol American Cobalt ski boats has blowers fitted as standard. When you turn the ignition to 1 the blowers fired up and it is recommended to run them for 4 mins before setting off, and us the manual fan at tick over and low speed. This is the risks of vapour associated with inboard petrol tanks and engines. For you trev, I guess what you do will need solar power to run. Look at the Ctek solar range, you put it between the panel and you battery to ensure you don't over charge them. Rob Wedger and Jim 2 Quote Link to comment Share on other sites More sharing options...
gjb Posted March 24, 2017 Report Share Posted March 24, 2017 I think with EU law older men need them fitted In there underpants Jim, Wedger and Greg 3 Quote Link to comment Share on other sites More sharing options...
Stuie Posted March 24, 2017 Report Share Posted March 24, 2017 I think with EU law older men need them fitted In there underpants Some of us have one already fitted as standard - don't they Neal? fisherman1055, sparky, Wedger and 1 other 4 Quote Link to comment Share on other sites More sharing options...
Wedger Posted March 27, 2017 Author Report Share Posted March 27, 2017 The purpose of one for 'Otter' is to keep the voids under the deck free from condensation - not for removing fumes from the engine bay as is most common for inboard petrol engines. Thank you all. Quote Link to comment Share on other sites More sharing options...
Maverick Martin Posted March 27, 2017 Report Share Posted March 27, 2017 Not sure that would work very well Trevor as bilge blowers are normally connected to the ignition system and therefore would only come on when you use the boat. If left on permanent they would drain the battery and even if on a timer would need to be on every day so would still drain the battery. Of course if you plan to use Otter everyday then problem solved Wedger and Jim 2 Quote Link to comment Share on other sites More sharing options...
Wedger Posted April 30, 2017 Author Report Share Posted April 30, 2017 Not sure that would work very well Trevor as bilge blowers are normally connected to the ignition system and therefore would only come on when you use the boat. If left on permanent they would drain the battery and even if on a timer would need to be on every day so would still drain the battery. Of course if you plan to use Otter everyday then problem solved If I could find the time to use her once a month it would be a bonus!! Think I need to go dry stack. Any ideas for a poor bloke chaps?? Jim 1 Quote Link to comment Share on other sites More sharing options...
Jim Posted April 30, 2017 Report Share Posted April 30, 2017 If you find one let me know Trev. I don't think there's such a thing around here Quote Link to comment Share on other sites More sharing options...
Adam F Posted April 30, 2017 Report Share Posted April 30, 2017 Boats sat for a long time in the water isn't a good combination for long life... as you've found. A dry stack is probably the most expensive way to moor a boat, so worse if you're not using it much... but the upside is minimal maintenance. Either that or trail it.... Bilge blowers won't help. A dehumidifier would but then you need shore power to run it 24/7? Quote Link to comment Share on other sites More sharing options...
Steve S Posted May 1, 2017 Report Share Posted May 1, 2017 Trevor a couple of thoughts. If the water egress is through the hull in contact with the water (put simply the small water molecules can easily pass through gell coat and fiberglass which is made of large complex chains of molecules ) then there won't be a lot of water getting in so not a lot of water to remove. If the bilge is totally sealed in then try some of those water absorbing boxes to bring the humidity level down. They need swap outs when they fill up. If not totally sealed then 2 air vents ideally at opposite ends will get some air through, just like a house boats need ventilation. Jim, Kingfisher 126, Stuie and 1 other 4 Quote Link to comment Share on other sites More sharing options...
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