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Author Topic:   where to place vent
jokor3 posted 11-24-2003 08:57 PM ET (US)   Profile for jokor3   Send Email to jokor3  
I am in the process of having a rear casting deck fabicated for my 15' striper. I will be using a 12 gallon under deck Moeller tank. My question is where to mount the gas line vent? I will have to mount it on the rear deck. So, should it be mounted as far forward and to one side or aft and to the side? Really will appreciate any and all suggestions.
spotsnspecks posted 11-24-2003 09:53 PM ET (US)     Profile for spotsnspecks  Send Email to spotsnspecks     
Forgive me (and my ignorance to the use of the description "under deck") if you have detailed this process somewhere else, but if you are going to do this please take some pictures to share. A good friend has a 15 Sport that is in need of some fuel tank reconfiguration. Is this a raised deck or are you cutting into the floor and scooping out foam? Good luck, sounds like an interesting modification!
jokor3 posted 11-24-2003 10:32 PM ET (US)     Profile for jokor3  Send Email to jokor3     
This is an above deck fabrication by a ex- boston whaler R&D engineer that worked with T. Dougherty in the early 80's. I t is a 3 compartment unit for the tank and 2 batteries. The top is matching sectional non-skid like the deck. Also an L shaped around the console for storage and live well which is topped with whaler cushions for the grandchildren to sit on while riding. I will send pics when it is complete, which should be toward the end of this week or the first of next week.
jokor3 posted 11-24-2003 10:33 PM ET (US)     Profile for jokor3  Send Email to jokor3     
Still need vent mounting location info.
overbrook posted 11-25-2003 11:07 PM ET (US)     Profile for overbrook  Send Email to overbrook     
jokor3 not sure exactly what you are configuring on your boat but here is what I know- you should never put a fuel vent in the rear of the boat- however the tiny tank your talking about I'm not sure? the reason for not putting it in the rear is when your running along and you slow the fuel in your tank goes forward and air is drawn in the vent and water comes up behind the transom and instead of sucking air it will suck water into the tank- for similar reasons the vent is most often placed forward midship in a place where water spray is not a problem and no wakes are going to wash up on the vent the problem with offering advise here is nobody except you knows where the fill is and where the vent is located on the tank and how the tank is situated in the boat and what kind of thru hull access you have- these are all important considerations! lastly I'll offer this where ever you place it you should be able to see the vent fitting from where you are filling the tank- so that you know if you are overflowing. hope this is of some help
overbrook posted 11-25-2003 11:13 PM ET (US)     Profile for overbrook  Send Email to overbrook     
jokor3 remember this too- where ever you mount the fitting there is a good chance that it can spit gas when filling and so-on so I'm not sure where you mean when you say the rear deck - but its not sounding good to me???? again if you can it should be ran along the gunwhale and thru the hull forward midship and it should always be on an incline never let it sag like a drip line or a p-trap

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