Fuel tanks

[Anonymous]

Hi as I have been having fuel gauge problems, I have reverted to dipstick ,works like a charm, however it seems that there is a restriction about3/4 of the way down the tank, must be a baffle of some sort? Can anyone explain please, thanks in advance

[Mark Ashley-Miller]

Hi Sulya2 (!) – I am not sure of your name!
Please see my post about fuel tanks on my 331 or do phone me on 07817845775
Mark
Mark Ashley Miller
markashleymiller@gmail.com

[Anonymous]

I’m not yet a Nauticat owner, I’m a pilot. Proper fuel management has been for me a major concern for obvious reasons. Dip stick is by all means and always the best option. Let me tell you how I would approach the problem. I assume this option is available for boats too. Check for a fuel computer system, with 2 fuel tanks you need to have two fuel flow sensors installed to a fuel management system, that will give you the exact fuel usage/hr and remaining as well as fuel required to destination. Important is to install the flow sensors after the fuel has been properly filtered. But this solution though not necessarily cheap will give you precise figures even in heavy seas!
Otherwise most of the times the sending units are the big issue and corroded contacts (poor grounding).

[Anonymous]

HiMark, many thanks for that, new to the forum , so have not yet done a profile, my name is Alasdair Ross, will check out your post tomorrow, Alasdair.

[Anonymous]

Many thanks for the reply , I’m not sure that we want to go into the complexities of fuel flow computers, although I totally understand why you would need this kind of system, dipping our tanks on a regular basis last summer has given us a pretty accurate idea of our fuel burn.many thanks again for taking the time to reply ,really appreciated,
Best Alasdair.

[Alasdair Woodfield]

Hi Alasdair,

The attached file from Nauticat shows the details of the 33/331 fuel tank.

I have aslo added a photo of what I did to gain access to each compartment after a diesel bug problem.

Regards,

Alasdair Woodfield

Attachments:

1. 

   Nauticat-331-Fuel-Tank-Drawing.pdf
   

2. 

   Strbd-fuel-tank-with-access-plates-scaled.jpg
   

3. 

   Port-fuel-tank-with-access-plates-scaled.jpg
   

[Anonymous]

Hi Alasdair, many thanks for that, that is a very neat job,there does not seem to be any kind of baffle in the drawings,when you accessed the inside of your tank did you see any sort of baffle there? It’s not really a big issue as I could measure the difference and make allowances.
Many thanks for your post.
Kind regards Alasdair.

[Alasdair Woodfield]

Hi,

Yes, 2 baffles as indicated by the hatched lines in the top, side view, of the drawings. Middle plan view is the starboard side tank, lower is port.

Finnish ‘Loiskelaipiot’ seems to translate to ‘Shale bulks’ !! I guess it means ‘bulkhead’ or baffle.

Fill and vent are in the middle section, pickup/return is in the aft section, the bottom of the pickup is in the little ‘sump’ shown in the drawing. The opening between the sections is a quite small cutout at the bottom of each baffle.

Regards,
Alasdair

[Anonymous]

Hi,

New here. Out of curiosity, do NC in general have fuel tanks accessible? In terms to check leaks, corrosion or to replace them?

Thanks!

[Author]

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