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Diesel sloshing and makes slapping sound when tank is full

Will Wagner

New Member
If I fill my 40 gallon diesel tank on my 384 past 3/4 full, it slaps and makes a really annoying sound when the boat moves at anchor. Are there not baffels in the fuel tank to prevent this? Does anyone else have this problem?
 
Hi Will - and welcome to the forum. Supposedly there are baffles in the fuel tank. I've not seen them but hope to get some photos of them this summer when I do my cleaning.
We have never once heard fuel sloshing around while anchored or underway. That makes me wonder what is different with your tank. I wonder if maybe a baffle is missing or was dislodged or something. I dug around in our tank and did a bunch of cleaning as described here:

https://www.morgan38.org/morgan38/i...aning-fuel-polishing-recent-experience.15602/

I found a bunch of debris in there that must have come from the time of construction. I wonder if you could have some debris that is making the sounds.

Good luck & keep us posted on what you find.
Cheers,
-Mark
 
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Thanks Mark. I really liked your detailed post on cleaning the tank. It sounds like the diesel hitting the top of the tank as it sloshed from forward to aft. It doesn’t sound like anything is in there, but who knows if it has ever been cleaned. Was wondering if anyone has had this problem as well, but doesn’t seem like it. I’ll have to do some investigating and let y’all know what I find.
 
Will
We have noticed the sloshing of the fuel when the tank is not quite full and there is something of a swell running through an anchorage. It is not a frequent event, only when the conditions are optimal. Cleaning of the tank would not relieve the sloshing. The water tanks also tend to make noise when they are nearly full. We never were concerned that it is or was a problem.

Jim
 
Hey Jim. I have had the water tank do it as well. It hasn’t been a huge problem because I only fill both tanks to 3/4 to prevent it. Right now I am in the Bahamas and had to fill it all the way up and my extra jerry cans because there has been instances where locals are not selling fuel to cruisers. Gonna head back to the states but want to make sure I have fuel Incase I need it. That’s why it’s a problem right now and extremely annoying when trying to sleep. Thanks for the reply and letting me know you have had this happen as well.
 
Will
Our experiences in the Exumas were that the people there were extremely generous and friendly. It seems times have changed. Do you expect any difficulty on returning to the States?

Jim
 
Jim
I think everyone is very confused from island to island and interpreting all the new laws and regulations due to Covid-19 differently. We get conflicting info on what’s allowed from every authority we talk to. Everyone we have met has been extremely friendly in the Bahamas.

The Prime Minister is coming out with some new provisions for pleasure boats trying to go home. We hope that they have certain places you can stop and anchor for the night, get food, and fuel. I think once that happens there shouldn’t be a problem. There were and maybe still are boats in Bimini where the Defense Force weren’t letting them leave to go back to the states. It’s crazy!

There is currently a full lock down until Tuesday where nothing is open and no one is allowed out of their house or off their boat.

-Will
 
Will

Where are you anchored at the moment? Hopefully the confusion will settle down and all will become more clear. I am wondering if the US will put restrictions on returning boats after the Bahamas allows you to leave?

I remember we were anchored at Little Farmers Cay and a Northwester was coming through. There were about 5 or 6 boats there. Terry, the owner of Ocean House, came out with his powerboat, collected everyones jerry jugs, and went off to get the jugs filled with diesel. It was an amazing gesture in the face of the coming storm.

Good luck. Let us know how you fare.

Jim
 
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