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09-06-2014, 11:07
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#1
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Registered User
Join Date: Apr 2009
Location: Canada or Spain
Boat: Jeanneau SO 43 DS
Posts: 1,162
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Loud Engine Blower on Jeanneau SO 43 DS
Our engine blower is loud and runs continuously in the heat of a Med summer. Apart from noise suppression, does any one else have any bright ideas? The blower is almost louder than the engine.
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09-06-2014, 11:16
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#2
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Registered User
Join Date: Oct 2005
Location: Presently on US East Coast
Boat: Manta 40 "Reach"
Posts: 10,108
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Re: Loud Engine Blower on Jeanneau SO 43 DS
Why would the blower be running when the engine is not? Some blowers are quieter than others. Also, the mounting configuration matters (how much head pressure, what it is mounted on, etc). If it is old, the bearings may be going or there may be chips or crud on the blades. Have you listened to a newer blower of the same type?
Mark
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09-06-2014, 12:24
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#3
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Moderator Emeritus
Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,351
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Re: Loud Engine Blower on Jeanneau SO 43 DS
Makes it sound like it has a temp switch that switches it on, as opposed to it being wired straight from the ign.?
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09-06-2014, 23:59
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#4
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Registered User
Join Date: Apr 2009
Location: Canada or Spain
Boat: Jeanneau SO 43 DS
Posts: 1,162
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Re: Loud Engine Blower on Jeanneau SO 43 DS
A64, you're right. Our initial thought was that it should have come on with ignition & as it didn't we suspected a faulty ignition switch. The blower didn't come on when you switch on the ignition but came on about 15 minutes after engine start & remained on until we shut down a couple of hours later. Then after a couple of hours lunch break the blower came on when switching on the ignition. It turns out the system is working correctly as there is a temp sensor in the engine compartment at the blower air intake duct. The problem is how loud the blower is, and I think colemj is on the right track. No, we haven't heard another blower but that may be in our future if soundproofing doesn't do the trick. The engine has <100 hours on it so doubt if it is the blades.
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24-12-2014, 22:16
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#5
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Registered User
Join Date: May 2012
Location: Seattle, USA
Posts: 11
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Re: Loud Engine Blower on Jeanneau SO 43 DS
A little late to the party here but if you change to a squirrelcage blower you'll get more efficient and quieter performance.
See this:
http://www.xylemflowcontrol.com/file...43000-0405.pdf
A bit bulkier but will fit and is vastly better than the cost-reduced part supplied with the boat. Note the datasheet points on life expectancy; there's an identical blower available with better lifespan but higher cost, if you prefer.
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26-12-2014, 04:56
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#6
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Registered User
Join Date: Aug 2012
Location: Maryland, USA
Boat: 58' Sedan Bridge
Posts: 5,430
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Re: Loud Engine Blower on Jeanneau SO 43 DS
It might be the blower is mounted directly to a hard surface, and it's the vibration you're hearing. Try remounting, using something like 2" sanitation hose as a stand-off.
-Chris
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Chesapeake Bay, USA.
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26-12-2014, 05:59
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#7
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Moderator Emeritus
Join Date: May 2008
Location: Fort Lauderdale, FL
Boat: 48 Wauquiez Pilot Saloon
Posts: 5,975
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Re: Loud Engine Blower on Jeanneau SO 43 DS
Quote:
Originally Posted by dbostrom
A little late to the party here but if you change to a squirrelcage blower you'll get more efficient and quieter performance.
See this:
http://www.xylemflowcontrol.com/file...43000-0405.pdf
A bit bulkier but will fit and is vastly better than the cost-reduced part supplied with the boat. Note the datasheet points on life expectancy; there's an identical blower available with better lifespan but higher cost, if you prefer.
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I'm not 100%, but fairly certain this is the blower I have... It's noticeable to sure when it's going, but not unpleasant...
Quote:
Originally Posted by ranger42c
It might be the blower is mounted directly to a hard surface, and it's the vibration you're hearing. Try remounting, using something like 2" sanitation hose as a stand-off.
-Chris
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As suggested above, this might be a solution... Tell us how the noise is offensive... Did it always sound kind of loud, or increase in volume lately?
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26-12-2014, 07:19
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#8
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Registered User
Join Date: Nov 2007
Boat: Beneteau FIRST 42
Posts: 1,836
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Re: Loud Engine Blower on Jeanneau SO 43 DS
If the blower is comming on based on a heat issue, get rid of the heat and the blower wont come on..
How to get rid of it is up to you to design..
When I installed a new refer unit, it was air cooled, and the compartment would get pretty warm, I plumbed a 3 inch duck up from the bilge into the compartment for cooler air and ran a 2 inch tube throu the cabinits forward to the forward head with a small muffen fan pulling the air out.. the muffen fan was conected throu a reley so when the unit went on, the cooling process would flow.. the compartment stays pretty cool now..
You'd be surprised at how much air a small 2 inch muffen fan will push..
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26-12-2014, 08:59
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#9
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Registered User
Join Date: Apr 2009
Location: Canada or Spain
Boat: Jeanneau SO 43 DS
Posts: 1,162
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Re: Loud Engine Blower on Jeanneau SO 43 DS
HappyMDsailor, the boat is quite new to us so I can't comment on how it sounded previously. The initial post was on our first day taking the boat out. Since then we've become more familiar with the blower & it's habits.
Randy, the heat is primarily ambient air. Then it takes very little engine heat for the thermostat to reach it's setting & turn on the blower.
The blower is located below the aft bunk. There are two large air vents, about 4" each, in the passage between the cockpit and the scoop. One is the intake into the area of the blower; one for the exhausted hot air. The exhaust is right beside the helm.
Since the initial post we have sound-proofed the blower. That did help, but the blower is still noisy enough to annoy the captain. I think, however, it is what it is. Replacing the blower is an option and we'll have a look at that link for the squirrel cage blower.
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26-12-2014, 09:07
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#10
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Registered User
Join Date: Jul 2006
Location: Underway in the Med -
Boat: Jeanneau 40 DS SoulMates
Posts: 2,274
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Re: Loud Engine Blower on Jeanneau SO 43 DS
have you postedthe issue on the jeanneau owners web site? a lot of knowledgeable jeanneau owners you may have or had similar problems.
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26-12-2014, 09:23
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#11
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Registered User
Join Date: Apr 2009
Location: Canada or Spain
Boat: Jeanneau SO 43 DS
Posts: 1,162
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Re: Loud Engine Blower on Jeanneau SO 43 DS
Thanks chuckr, I did, but I haven't checked back there for a while to see if there has been anything added. I did get a better understanding of the system from them though.
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26-12-2014, 09:47
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#12
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Registered User
Join Date: Aug 2006
Location: Skagit City, WA
Posts: 25,514
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Re: Loud Engine Blower on Jeanneau SO 43 DS
Get rid of the thermostat and put in a switch. Turn it on when you start the engine. If it's too loud when the engine is running replace the blower, it's defective.
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26-12-2014, 10:01
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#13
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Moderator Emeritus
Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,351
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Loud Engine Blower on Jeanneau SO 43 DS
A squirrel cage blower you will not hear with the engine running, even at idle.
If it annoys him it's not worth putting up with, fix it.
Wire it so it comes on when the switch is on, before engine start, that way you hear it run every time before you start the engine and know it's still working. You can't over cool the engine compt.
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26-12-2014, 12:05
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#14
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Registered User
Join Date: Mar 2011
Location: Eastern Mediterranean
Boat: Jeanneau 54DS
Posts: 128
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Re: Loud Engine Blower on Jeanneau SO 43 DS
Quote:
Originally Posted by Cheechako
Get rid of the thermostat and put in a switch. Turn it on when you start the engine. If it's too loud when the engine is running replace the blower, it's defective.
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This is exactly how I have it on my Jeanneau. In addition, I was able to reduce fan noise further by tightening the fan mount (it was somewhat loose), thereby significantly reducing the vibrations.
I can't comment on how useful or effective the fan really is, but I do wonder... The exhaust fan is inside a duct that starts in the middle of nowhere in the engine room, and blows out air that is at worst lukewarm outside... Is that the configuration in your DS?
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26-12-2014, 12:50
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#15
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Registered User
Join Date: Apr 2009
Location: Canada or Spain
Boat: Jeanneau SO 43 DS
Posts: 1,162
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Re: Loud Engine Blower on Jeanneau SO 43 DS
No Phoenician, not the same. The blower is located under the aft bunks & large ducting leads to the vents in the cockpit. There is significant hot air being blown out of the exhaust vent. Putting a switch on the fan as A64pilot suggests makes good sense but does nothing to eliminate the sound. We do believe the fan is necessary so don't want to eliminate it or put the fan on a reostat (another suggestion we got). The squirrel cage fan sounds like the best alternative though if we need to go that way.
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