static electricity - gas - portable tanks

gnrboyd

Petty Officer 2nd Class
Joined
Oct 18, 2007
Messages
157
I recently acquired a 16' aluminum boat. When I bought it, the tanks were just floating around under the back deck and I didn't like the battery position. I secured the 2 tanks with one large web strap around both of them and moved the batteries as well. The gas tanks can still slide somewhat but not very far. My back deck has a lid that closes and still has a couple of inch gap across the length of the lid. I also have my batteries mounted in this location. I mounted the tanks so that I can get to the batteries easily and can get to the fill nozzle on the tanks when opening the back lid. The gas tank connections are reachable though the front access slot between the 2 seats. (Difficult to explain but the point is that there is free air flow through this part of the boat.)

My plan was to fill the tanks without removing them from the boat either while the boat is on the trailer or at the marina on the water. I am now somewhat concerned about static electricity when filling the tanks. The way I have the tanks mounted, I would have to remove the batteries to get the tanks out which would be a real pain. If I move the tanks so I can take them out to fill, it will make the tanks right next to the on-board battery charger. (That is another reason I moved the tanks) It would also make the batteries next to impossible to get to.) The previous owner said that when they bought the boat new, it was supposed to have a 10-12 gallon on-board tank but this boat does not have a fill nozzle for that. My guess is it was supposed to have just one of those larger "topside" tanks that are mounted permanently but still have a screw off cap. If that is the case, by me having the tanks strapped down fairly well, wouldn't this be about the same? Do you see any problems with static with my configuration?

This isn't the best photo but there is about a 2 inch gap between the lid and splash well. There is also an open vertical slot in the front of the seat pedestal that is about 4 inches high. Basically, my batteries are set just under the lid opening going across the boat and the gas tanks are behind them (towards the front - just under the seat pedistal) and sit lengthwise with the gas fills accessible when the door is open.

Thanks for the help.

DSC_0024.jpg
 

5150abf

Vice Admiral
Joined
Aug 12, 2007
Messages
5,808
Re: static electricity - gas - portable tanks

I am pretty sure you don't want to fill the tanks onboard, first of all if you miss with the nozzle you douse your boat with gas and create a problem and as the tanks fill they will vent gas fumes in an (mostly) enclosed area I have seen a video of a guy filling a gas can in the back of his truck, ie not grounded, as he pulls the nozzle out, POOF!,a spark ignited the tank.
I have the same boat as you except older, I used to carry 2 tanks but found I rarely go that far and didn't want to carry the extra weight,anyhow, I left mine removable so I can set it on the ground when it is filled as not to mimic the video guy.
Mine is only attached by the gas line and it has never moved at all, the more gas you have in it the more it won't move and I run all kinds of water and trailer the boat 10-15 miles to the launch I don't think moving is a real problem but the static might be.
Hopefully someone else weighs in on this, but I wouldn't do it.
My humble opinion
Oh and, Nice boat!
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,226
Re: static electricity - gas - portable tanks

Yeah, it sort of scares me too. Spillage and lack of proper venting to name a couple. Isn't there a way to install a proper permanent tank with a fill cap on the side deck?

There are definate requirements for tank installation and venting. Follow them.
 

gnrboyd

Petty Officer 2nd Class
Joined
Oct 18, 2007
Messages
157
Re: static electricity - gas - portable tanks

Would running some type of ground wire be an acceptable alternative to taking the tanks out to fill? If so, how would you do it? My tanks are the standard plastic Evinrude tanks. I can't really see the difference in my set up vs. using one of the "topside" tanks like this one.


My deck is not fully enclosed and has cross ventilation. When I open the lid to get to the tanks, it's pretty open.

By the way...5150abf ...how do you like your FM160? I've had mine out a couple of times but have yet to fish out of it.
 

5150abf

Vice Admiral
Joined
Aug 12, 2007
Messages
5,808
Re: static electricity - gas - portable tanks

I wish it was a little wider but it has done me well, still nice and tight even being an '80.
Sea-Nymphs were built about 1/2 hour from my house so there are alot of them around here, they are a really good boat.
 
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