Ben 40 engine room blower power

T

trishark

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Nov 19, 2013
8
Beneteau 40 Seabrook TX
The engine room blower located port aft rear of my boat does not run when the engine is on. Ran temp 12V to blower and it runs. My "wonderful" manual has a reference to the blower but it does not seem to be correct. Not able to find where power should come. Nothing at the key switch. The G1 relay for connecting the ground circuit for the windlass and thruster does not switch the blower ground. Anyone found where power should come from?

MIke
 
Gunni

Gunni

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Mar 16, 2010
5,937
Beneteau 411 Oceanis Annapolis
It is my understanding that the blower motor is thermostatically switched.
 
Jackdaw

Jackdaw

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Nov 8, 2010
11,386
Beneteau First 36.7 & 260 Minneapolis MN & Bayfield WI
Every new-ish Beni I've run across has the blower switched to the engine power key. As soon as the key is turned, the blower is always on.

I'm pretty sure ours has a relay that kicks energizes it off of the keyswitch. I'd look for that.
 
DougM

DougM

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Jul 24, 2005
2,242
Beneteau 323 Manistee, MI
I doubt whether the blower is thermostatically controlled.
The blower on my 323 runs 100% of the time when the engine is running.
It probably needs to run to help pull combustion air into the confined engine space in addition to removing some heat, although very little.
 
Gunni

Gunni

.
Mar 16, 2010
5,937
Beneteau 411 Oceanis Annapolis
DougM said:
I doubt whether the blower is thermostatically controlled.
The blower on my 323 runs 100% of the time when the engine is running.
It probably needs to run to help pull combustion air into the confined engine space in addition to removing some heat, although very little.
Click to expand
You must be right Doug, my electrical diagram shows Black #18 from the blower to battery switch (helm?), Red #18 battery switch to panel (not by the breaker panel), and Red #181 panel to blower. No mention of thermostat the electrician suggested. My blower is apparently also not powering up. However, the engine runs fine, and the temp is on the low side - 165-170 deg.
 
M

MI248

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Sep 17, 2013
14
Beneteau 40 CHS
On B40s the fan runs when the key is in on position and stays on while the engine runs. Poke around the house battery area under the aft cabin bench seat (2 cabin), and you will likely find a blown or missing fuse. My fuse is near the main battery switches.
 
T

trishark

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Nov 19, 2013
8
Beneteau 40 Seabrook TX
Wires 18 red and black(or yellow?) do run to the blower motor. They enter the wiring bundle behind the engine / 2nd house battery compartment. Not easy to find them any were else. There is no extra wire at the key switch that could run to the blower or relay. Have looked at the house battery compartment and not found a blown fuse. There would need to be a relay that is energized when the key is on and I have not found it. I mentioned the G1 relay in the original post as it would be the logical way of turning on the blower. The wire from the key switch to the alternator and then to the G1 relay are the only switched power in the engine room I have been able to find. There is a relay above the power distribution strip behind the radio that I have no idea what it powers. Did not find any numbers on the wires but will have to strip back more of the electrical tape. I appreciate all the comments. Will let you know what I find.
 
Ron20324

Ron20324

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Jan 22, 2008
8,050
Beneteau 323 Annapolis MD
If your B is like mine, the wire number is stamped every so often, maybe a foot? Yard? ??? It is not just at the very end- under the tape.
 
gleason99

gleason99

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Oct 29, 2008
25
Beneteau 37 Wilmington,DE
I have a Beneteau 37 with the Same issue, I have called the dealer to see where the relay or the fuse is. I am pretty sure it will be the same on most all models. The wires at the back by the blower in my case our purple (positive) and black negative disapear into the wiring harness and I have no idea where they go. The engine room gets pretty warm without the blower.
 
Mike B

Mike B

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Apr 15, 2007
1,013
Beneteau 43 Baltimore, MD
There's a red inline 10A fuse located on the right hand side in the vicinity of the rear battery isolator located in the house battery compartment. It's most likely the fuse has blown. It powers both the engine room blower and the house bank battery isolator. If the fuse is blown neither the blower nor the isolator will function. As a telltale sign check the voltage reading on the Tridata environments page when motoring to see if you're getting proper charging. It should read 13+ VDC. The fuse will begin to experience intermittent failures when the blower is on it's last legs.
Mike
 
gleason99

gleason99

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Oct 29, 2008
25
Beneteau 37 Wilmington,DE
Well thanks for the tip, I found about 3 of those little 10 amp fuses and sure enough one was blown. It would be nice if Beneteau labeled those things! The Plastimo blowers are junk, I have been through several, I imagine the current one has a short thus causing the fuse to blow. Do you know if the red fuses are available at an auto parts store or are they like all of the Cartier relays which are only available from Beneteau?
 
Mike B

Mike B

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Apr 15, 2007
1,013
Beneteau 43 Baltimore, MD
Yes you can get the fuses at any auto parts store. As a matter of fact that's the best place to buy them as West Marine charges more for 2 than Walmart charges for 6. BTW the fuse is not on the schematic that came with the boat. I discovered the association with the battery isolator when the house batteries stopped taking a charge from the alternator. I troubleshot the isolator and when the fuse continued to blow I chased down the wiring to find it led to the blower. They tied both together off the ignition key as they only operate with the engine on.

As for the blower itself I wasn't able to get another Plastimo. Beneteau instead shipped a Jabsco. The Jabsco was more expensive than if I had purchased it off the web, it's noisy beyond belief and has a slightly larger extrusion that the existing duct hose won't fit. I had to jury rig the duct hose using flexible dryer duct from Lowes but the noise remains. I'm waiting on a new blower from Beneteau via the dealer and in the mean time have it disconnected.
Good luck with getting yours fixed.
Mike
 
gleason99

gleason99

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Oct 29, 2008
25
Beneteau 37 Wilmington,DE
I just purchased a rule inline blower that I am going to install now that I have solved the power issue, you have to get a 3 inch outlet and duct work from the inline blower. But I have tested it and it is much quieter. I will let you know how it works out
 
Ron20324

Ron20324

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Jan 22, 2008
8,050
Beneteau 323 Annapolis MD
gleason99 said:
.... But I have tested it and it is much quieter. I will let you know how it works out
Click to expand
Noise being in the ear of the beholder, at the minimum it lets you know that is IS running, Probably not a bonus if someone is trying to sleep in the aft cabin.
 
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J

Joe2954

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Jan 22, 2008
169
Beneteau 343 Saint Helens, Oregon OR
Recently replaced a burned out Yellowtail with an Atwood that is way quieter. I only ran the old one when the balmar lowered output cuz it just screamed. The Atwood was about $22 on Amazon. Mine is on a separate manual switch but will add a temp switch to kick it on when engine temp is over 120. 343s did not come with blowers.
Atwood has a 4" blower for only a few bucks more.
 
Lee Hadjiosif

Lee Hadjiosif

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Apr 14, 2010
195
Jeanneau 42DS Larnaca Marina
trishark said:
The engine room blower located port aft rear of my boat does not run when the engine is on. Ran temp 12V to blower and it runs. My "wonderful" manual has a reference to the blower but it does not seem to be correct. Not able to find where power should come. Nothing at the key switch. The G1 relay for connecting the ground circuit for the windlass and thruster does not switch the blower ground. Anyone found where power should come from?

MIke
Click to expand
When I bought my B381, the blower wasn't working so I traced the wires and found the hot wire clipped right before it entered the blower. Apparently the PO didn't like the noise and decided to cut the wire. If he had looked behind the control panel he would have seen the inline fuse and just remove it instead of cutting wires. Anyway, I spliced the cut wire and the blower was coming on (noisy) when I turned the key on which I didn't like, so I installed a toggle switch with a built-in LED light in the panel. Now I make sure the switch is off when I start the engine and then I flip it on whenever I want. Still the ignition switch has to be on.
Lee
 
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