Our new B40 emits bad odors from the holding tank vent on the starbopard side of the hull. No odors in the cabin, but when we sail and the wind blows it's pretty bad, and coming only from the starboard side. The tank is not full--no liquid is coming out, just odors.  On our prior Beneteau we used a product in the holding tank called KO--Kills Odors--and it worked fine; same product on the new boat doesn't help at all.  Any suggestions?

Views: 348

Replies to This Discussion

Hi Gary

I have the same friggin problem. I spoke with a guy at a marina who had the same issue. he added a inline filter to the out going vent and it totally eliminated the problem. I never got his name or number to get more info. im sure if you go on line or ask the broker who sold you the boat, you may get some info. ill throw the question to Mike Brown who in sea knows in the Beneteau40-43 boat group. let me know if you find anything else.

You can buy the vent filters at West Marine.  Pricey but last quite a while.



Are you flushing with salt or fresh water? If it's salt then that may be your problem. While a full holding tank will vent nasty odors with either water type, it's especially bad with salt. The salt water has microbes in it that decay producing some horrific odors. Converted both our heads to fresh water and love it. We really don't notice the difference in water consumption either.


Hi, I know this is an old thread but does anyone have any info on the conversion to fresh water flush for a Oceania 40?


Latest Activity

John Hanrahan liked sam's discussion eyebrow salon window re-bed
John Hanrahan replied to sam's discussion eyebrow salon window re-bed in the group Beneteau 40 & 43
"Sam, I am just in the process of replacing both of my eyebrow windows.  I have the new ones from Beneteau and am talking with dealer in Florida re Bebeteaus advice. It would be helpful to talk to you about your experience. I have never seen…"
May 7
John Hanrahan posted a blog post

Cabin eyebrow windows

Good morning gang,I have received both port and starboard cabin windows from Beneteau for replacement as the existing leak and are badly etched. Beneteau has referred me to the dealership for installation but I'm having trouble getting a response.   Does anyone have any experience replacing these and any recommendations. JohnSee More
Apr 28
Kerim N replied to Randy Brown's discussion Beneteau 40 Black Mesh Window Covers in the group Beneteau 40 & 43
"Hello Randy, New to the group, going through the posts, I have come upon this thread.  I was considering tinting my windows of my Beneteau 43 with a darker tint, but I really like your idea.  So I will copy with…"
Jan 6
Kerim N joined CAN DRAC's group

Beneteau 40 & 43

A place to exchange thoughts, ideas and discussions about the Beneteau/Oceanis 40 and 43 models.
Jan 6
Kerim N is now a member of SeaKnots
Jan 5
Mike Brown replied to Larry Witty's discussion B43 Windlass Drainage in the group Beneteau 40 & 43
"Larry good luck. And remember to use the KISS Method when troubleshooting. Keep It Simple Stupid haha. It’s an old and basic concept that dictates you always do the easiest and obvious stuff first. Then if it doesn’t fix it get more…"
Dec 23, 2021
Larry Witty replied to Larry Witty's discussion B43 Windlass Drainage in the group Beneteau 40 & 43
"Thanks Mike, good advice which I will follow."
Dec 23, 2021

© 2022   Created by CAN DRAC.   Powered by

Badges  |  Report an Issue  |  Terms of Service