First off thanks to all that replied. the comments and advice were of assistance. Here is what I found out
1) There was old water in the fresh water tanks. yes i should have checked that first...Smelled just like sewer and I suspect that the stagnant hot water heater water was contributing to the smell under the vanity in the head 2) I discovered a loose fitting inspection port cap on top of the holding tank. This port is not visually accessible unless you remove the sink. I found it because when filling the tank with super chlorinated water I over filled it which caused some water to run down along the front of the tank. i was concerned that i had a crack in the tank. When i stuck my hand as far as i could from behind head, through back of hosing i touched the loose fitting port cap on the top of the tank. This is where the source of overflow water must have come from and in turn may have been source of odors as well. So two culprits: 1) stagnant fresh water - emptied and cleaned tanks 2) loose fitting inspection port cap.- rinsed chlorinated, repeat, tighten inspection cap learning lots about our new boat 🙂 now on to change out secondary fuel filter Cheers, blair ________________________________ From: CnC-List <cnc-list-boun...@cnc-list.com> on behalf of David Risch via CnC-List <cnc-list@cnc-list.com> Sent: October 4, 2019 5:31 PM To: cnc-list@cnc-list.com <cnc-list@cnc-list.com> Cc: David Risch <davidrisc...@msn.com> Subject: Re: Stus-List Smelly head Just spray it around...odor suspect areas? ________________________________ From: CnC-List <cnc-list-boun...@cnc-list.com> on behalf of Marek Dziedzic via CnC-List <cnc-list@cnc-list.com> Sent: Friday, October 4, 2019 3:48:55 PM To: cnc-list@cnc-list.com <cnc-list@cnc-list.com> Cc: Marek Dziedzic <dziedzi...@hotmail.com> Subject: Re: Stus-List Smelly head If you are looking for a chemical solution to fight odours, there is a product called “PureAyre” that can help. It kills smells, but you have to stop the leaks etc. or it won’t help you much. Marek 1994 C270 Legato Ottawa, ON Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10 ________________________________ From: CnC-List <cnc-list-boun...@cnc-list.com> on behalf of Della Barba, Joe via CnC-List <cnc-list@cnc-list.com> Sent: Thursday, October 3, 2019 1:29:23 PM To: cnc-list@cnc-list.com <cnc-list@cnc-list.com> Cc: Della Barba, Joe <joe.della.ba...@ssa.gov> Subject: Stus-List Smelly head The worst smell is when the boat is sitting and all the algae in the *intake line* rots. Then the first time you pump it the smell could knock a buzzard off a septic tank truck. One stopgap for smelly hoses is to get tea tree oil and spray the hoses down with it. It does a decent job killing organic odors. If you want to be scientific, bubbling oxygen through the holding tank would be a help too. Anaerobic bacteria have an output of hydrogen sulfide and aerobic bacteria do not. Joe Coquina
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