Turning off engine blower
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Category: General
Forum Name: Chit Chat
Forum Description: Talk about anything to do with your boat
URL: https://www.myhanse.com/forum_posts.asp?TID=5286
Printed Date: 27 March 2026 at 01:44
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Topic: Turning off engine blower
Posted By: nickfabbri
Subject: Turning off engine blower
Date Posted: 03 July 2011 at 20:31
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Is there any reason why I can't put a simple switch from the engine blower to turn it off? The noise drives me mad and I have heard that it is only there so that the boat complies with EU regulations or something similar.
I can see no real danger or disadvantage in doing this. ------------- Nick71 Hanse 320 |
Replies:
Posted By: Idelfix
Date Posted: 03 July 2011 at 21:30
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No
I have fore 3 years now and it works fine with out blower ------------- "Keep sailing in free wind" http://suhrfa.blogspot.se |
Posted By: iemand
Date Posted: 04 July 2011 at 07:55
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Yanmar is recommending certain temperatures for the engine room. This is also related to efficiency and long time wear. It is simple to say that cooler is always better. The engine would also work in a hotter enviroment but less good.
Why should you switch that off? Doesn't make sense to me.
BR Thomas
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Posted By: Peter-Blake
Date Posted: 04 July 2011 at 08:12
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Which engine blower is build into your boat? Some time Hanse used a very noisy but cheap fan from attwood for this. I changed it to one from plastimo. It is totally diffrent now! The sound of the old fan was much louder than the engine itself. The new one is not audible when the motor is running! ------------- Blake 370 
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Posted By: Stella*Nova
Date Posted: 04 July 2011 at 08:42
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For the maiden trip I was really nerved about he noise, I bought a switch to turn the fan off for manouvers in harbour. For longer motor trips I switched it on and i measured that temperatur is going down. After te maiden trip I had few complains, one was the fan. Hanse changed it to a more quiet one and now I'm happy with the sound. ------------- BR Ralf, Ex. 'a mare' H370 |
Posted By: MarcoC
Date Posted: 04 July 2011 at 10:54
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Which noise are you refferring to? The one in the engine room or the sound coming out from the air ducts? ------------- "Älva" Hanse 370#671 Stockholm, Sweden http://www.wesailhanse.se" rel="nofollow - www.wesailhanse.se big wheel, deep draught iron keel, 3 cabins,Yanmar 3JH4E, Sparcraft rig. |
Posted By: Idelfix
Date Posted: 04 July 2011 at 19:21
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When you run a 2 liter engine at 2500 rpm, you get a turnover of 5,000 liters of air per minute and it should be more than enough ventilation in the engine compartment ------------- "Keep sailing in free wind" http://suhrfa.blogspot.se |
Posted By: CharlesP
Date Posted: 28 July 2011 at 17:06
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I cannot see or hear an engine fan on my 320. I have vents in the companionway which supply air down to the engine.
Charles ------------- 'MERIDIAN LADY' 320 Nr 536 2010 Medway |
Posted By: Gordon Harrison
Date Posted: 29 July 2011 at 09:32
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Charles
if you are missing the noise, I have you can hear if you want to swop. ------------- Gordon |
Posted By: trist33
Date Posted: 29 July 2011 at 10:31
| Our blower is very quiet, we hardly hear it but it does work, I occasionally hear it coming from a vent in the stern, I think the cheaper ones are the noisy ones! |
Posted By: Gordon Harrison
Date Posted: 29 July 2011 at 10:41
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trist
do you know the make of your blower ------------- Gordon |
Posted By: CharlesP
Date Posted: 29 July 2011 at 13:46
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Oh Gordon. If only you had mentioned swapping earlier. We could have done it when I was in Cawsand, which I think is quite close to you. Your large headsails would have been useful for my passage onwards.
Charles ------------- 'MERIDIAN LADY' 320 Nr 536 2010 Medway |
Posted By: trist33
Date Posted: 29 July 2011 at 15:06
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Gordon
i'll have a look this weekend, can you tell me the size and make of your larger headsail, weve been out a couple times this week with low winds, and the self tacker is useful but not good enough in a f3, we have the extra tracks fitted but have never used them,did you use the same installation as shaukaas?  cheers Gordon
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Posted By: Gordon Harrison
Date Posted: 30 July 2011 at 08:21
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Thanks trist. we got a North sail 4.1 m from clew to luff. Yes I copied shaukass couldnt think of another way other than a block off the stern cleat. maybe code 0 is an easier option as suggested by Nick ------------- Gordon |
Posted By: Gordon Harrison
Date Posted: 30 July 2011 at 08:23
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Charles I only want to swop to a quieter fan not the head sail ------------- Gordon |
Posted By: panos
Date Posted: 30 July 2011 at 16:14
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We faced the opposite problem : How to run the blowers after the engine was shut down. This is important for us also when we run the generator. We noticed that running the fans for about an hour after stopping the engine reduces the rear cabin temperature and smell considerably. Initially we used a spare switch to feed the blower together with the existing engine circuit but the engine buzzer was activated, so we used a relay to deactivate the engine circuit when the blowers are directly fed by the manual switch. ------------- Panos Hanse 630e - selling her - |
Posted By: rtchina
Date Posted: 02 September 2011 at 11:12
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The Atwood fan stopped working this summer so replaced it with another Atwood, same model but revised with different blades. Definitely quieter. Also, I changed the fitting method. No longer screwed to the bulkhead but "floating". this also reduced sound in general. I had thought about the suggestion from Panos, keeping the fan running, and I think I will try this with a relay. The aft cabins are definitely warmer after running the engine and since we are now based in Greece, this is not so good. ------------- 430e Ella Jane - Greece |
Posted By: H8jer
Date Posted: 02 September 2011 at 11:17
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This summer I placed a wireless thermometer in the engine compartment.
The highest temperature I measured was 46 ° Celsius (115 ° F). This was when the engine was turned off. When the engine is running, the temperature is somewhat lower. I have no engine fan. ------------- Hanse 370#487 30HP 3-cabin |
Posted By: silversailor
Date Posted: 02 September 2011 at 16:15
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Our H 370, delivered in the US, has no blower.
------------- Silversailor South Haven, MI USA S/V Legacy 2010 Andrews 28 |
Posted By: coriolis2
Date Posted: 04 September 2011 at 18:38
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Nick, it is probably screwed to the wall which will transfer the noise, it did in our case (Hanse 350 2007). If you hang it freely in tiewraps the noise will be reduced.
This year the fan broke down so we are running without it, no problems and I will not replace it. Regards, ------------- "Coriolis" H350 #045 (ex Waarschip 570 #? 1987/1992, ex Waarschip 28LD #7 1994/2007) |
Posted By: White Lines
Date Posted: 18 October 2011 at 08:59
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We had a very noisy fan fitted to our 2008 320 which was so annoying in the first year that I disconnected it for the second year. We noticed a hot diesel engine smell after a long motor in one day. This year I had the boatyard install a manual illuminated (when on) switch under the compaionway ladder which we activate when motoring for more that fifteen minutes. The blower was VERY noisy. ------------- Hanse 320 #154 GBR7888L |