Gas line filler

[VicS]

Also, I have two tanks... I'm going to use the second one here...

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I don't know what it's called but that tells you how much gas is in the tank, correct? Shpuld I take that one off the first tank and add it to the black one there? And then just fingers crossed it works?

So do I just connect a wire to the prongs on the black thing on the rank and attach it to the bottom of the boat? Or the wooden floor?

What is the tank made of ? If it is plastic it does not need to be earthed except perhaps if the hose connection is a metal fitting that should be earthed.
It is probably the metal deck filler which is the most important component to be earthed,

The bonding must make contact with the water
If the boat hull is aluminium a connection to it will serve as the connection to the water.
The metal filler will be in contact with the hull.

If you fill the tank while the boat is ashore perhaps you need to consider earthing it before filling the tank although you don't earth a motor vehicle before filling !

 

[ChromeDome]

If the boat hull is aluminium a connection to it will serve as the connection to the water.

Keeping in mind that paint will isolate the alu from the water (as per the photo the hull is 100% painted), making the motor (ie. the battery negative wire) a better choice.

 

[VicS]

Keeping in mind that paint will isolate the alu from the water (as per the photo the hull is 100% painted), making the motor (ie. the battery negative wire) a better choice.

but not if it is lifted clear of the water.
.

 

[ChromeDome]

but not if it is lifted clear of the water.
.

Obviously .
The need for an electrically conductive connection to the water is clear.

 

[VicS]

Obviously .
The need for an electrically conductive connection to the water is clear.

I suspect the op's real problem will be that being a trailed boat he will often be filling the tank while ashore on the trailer. How do you earth the filler then?

 

[Dubbies]

I suspect the op's real problem will be that being a trailed boat he will often be filling the tank while ashore on the trailer. How do you earth the filler then?

Correct. I'll most likely fill it while it's on the trailer.

However time to time I may fill up on water.

 

[William_H]

Do be careful of petrol. Reminds me of a story about a helicopter pilot out in the sticks had a fuel dump available from 200l drums. He came prepared with a little 12v pump just for the job. Clipped the leads on the helicopter battery and pumped away beautifully. Tank filled and over flowed. In panic he jerked the leads off the battery. You can imagine with spilled petrol he had an almost instant heap of ash. (and no helicopter) ol'will

 

[Dubbies]

Ok so I have this metal tank I'd love to use because if fits perfectly for my boat. 90 litres so it's almost 2 times bigger than another plastic one that I bought that's 50 litres.

Here are my options. Which one would you pick?

1) metal tank but it's a bit dirty. the guy had it in his boat a month before I bought it. My plan is to put a bit of gas in it, put a new chain in there and swish it around for a bit. Try to take some rust/debris out from the bottom of the tank. Empty it, and repeat the process until it's not getting any cleaner.

Or:

2) use this plastic tank that doesn't fit as well in the boat and only holds 50 litres. I'd have to cut some holes in it and vent it, screw in the fittings from the old tank (hopefully I cut it right because I only have one chance) and just live with it being a little in the walk way and not having as much gas on board.

What should I choose? Option 1 or option 2?

 

[Refueler]

Staic electricity build up can be a real danger. Hence codes require bonding wire fuel filler to tank to engine or power negative. Sorry to harp back to aircraft (petrol) it is mandatory practice for the fuel delivery truck to ground the truck to earth points around the tarmac and to the aircraft. The aircraft will have a tab near the filler where the filler nozzle is grounded to the aircraft by a wire before the filler cap is opened. Hence any spark from static is dissipated before opening the fule tank filler. So perhaps a few ideas there. ol'will

Aircraft, like ships,.. generate high static loads while in flight / on passage and needs to be dissipated before connections made.

 

[VicS]

Aircraft, like ships,.. generate high static loads while in flight / on passage and needs to be dissipated before connections made.

Why do ships accumulate high static charges? I'd have thought it would be dissipated through the water.

 

[Refueler]

Why do ships accumulate high static charges? I'd have thought it would be dissipated through the water.

It doesn't actually .... and is why tankers have to have grounding cable attached before connecting hoses.

 

[Refueler]

It doesn't actually .... and is why tankers have to have grounding cable attached before connecting hoses.

OK let me expand on that - now that I'm sitting in hotel - had my Carvery Dinner and Guinness.

1. Ships have IMPRESSED current Cathodic Protection.
2. they have enough generator capacity on board to power a small town or village.

The movement of the hull through water in itself generates static + #1 and #2 lead to a potential across the ship that is different to the potential ashore. Therefore needs to be equalised or taken into account.
Sadly though the size of cable needed to successfully dissipate such potential quickly is too large to handle. Therefore manageable cable is used that should dissipate this over a reasonable time ... plus ensure that static created by the fluid pumped through lines to / from shore is catered for.

 

[Dubbies]

#science

 

[nicklee]

Ok so I have this metal tank I'd love to use because if fits perfectly for my boat. 90 litres so it's almost 2 times bigger than another plastic one that I bought that's 50 litres.

Here are my options. Which one would you pick?

1) metal tank but it's a bit dirty. the guy had it in his boat a month before I bought it. My plan is to put a bit of gas in it, put a new chain in there and swish it around for a bit. Try to take some rust/debris out from the bottom of the tank. Empty it, and repeat the process until it's not getting any cleaner.

Or:

2) use this plastic tank that doesn't fit as well in the boat and only holds 50 litres. I'd have to cut some holes in it and vent it, screw in the fittings from the old tank (hopefully I cut it right because I only have one chance) and just live with it being a little in the walk way and not having as much gas on board.

What should I choose? Option 1 or option 2?
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metal tank

 

[Refueler]

Hey guys, I'm new to boating and I got this gas filler for the boat. I'd like to install one since I got a larger tank for it.

This one came with the boat, the guy never put it on. It has some sort of build up on the inside. What is it? Is it safe to use? Is there a good way to clean it?

I don't mind buying a new one... Just figured I'd save money if this one is OK.

Honest answer ? From a user of a 5m mobo ....

I considered 'upgrading' to a built in tank ... boat is aluminium ... yes true ... old Soviet job - worth far more scrap value than as a boat !!

But I decided against it. I had been offered a good well designed ex small truck tank that fitted well.

Why ?

The system on board is two outboard portable petrol tanks of 25ltrs each. Engine is 20hp 2str Mariner. The tanks sit in the transom locker - one each side with fuel connectors ready. I fill both tanks ... and then connect one. I do not have them paired - they are separate.

Reason > I am lazy and I can run the boat on one tank ... if we decide to go distance - if tank runs dry ... I know at slightly reduced throttle - the other tank will get me home.
The tanks are not so heavy / large that I cannot lift out and fill at petrol station ... OK - usually I use Jerry Cans and leave them in the boat - filling from the jerry cans ...

No need to bond (ground) ... all nice and easily maintained.

That's my opinion anyway.

 

[Dubbies]

Yah I hear yah. That makes sense.

My problem is that I have a 2 stroke 90 hp merc and I went through 2/3 of a tank in an hour. Not great she the kids want to go tubing and water skiing.

 

[Refueler]

Yah I hear yah. That makes sense.

My problem is that I have a 2 stroke 90 hp merc and I went through 2/3 of a tank in an hour. Not great she the kids want to go tubing and water skiing.

I hear you .... not exactly sipping fuel !