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Old 06-03-2017, 21:34   #1
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Join Date: Oct 2012
Location: Broussard, LA
Boat: Roberts, 36 ft Cutter
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Diesel Fuel Tank Inspection Port

Does anyone out there know of an off the shelf add on inspection port for my aluminum fuel tank, or suggested fabrication details for a build your own access port?
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Old 06-03-2017, 21:57   #2
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Re: Diesel Fuel Tank Inspection Port

I'm sure there are usable off the shelf options, but on my tank I found the best places for access were oddly shaped and so I made my own. Easy enough to do. Get the proper thickness marine aluminum from a place like online metals, and just size it over between 1/2 and 1 inch on all sides. You can use gasket material, or a diesel proof form a gasket, and space bolts every couple inches around the perimeter. I tapped mine into the tank, so the heads are in the tank and the threads sticking up so all you have to do is put a nut on the bolt and tighten it down.

I had to do this as part of a full on tank clean out on Aeolus. Here are photos of my tank process and the access hatches I used. It has worked great, with no problems after encountering some seriously rough 50 knot wind seas here in the Salish Sea. Stories of Aeolus- Our Gulf 32 Pilothouse: Fuel tank repaired in epic fashion
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Old 06-03-2017, 23:22   #3
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Re: Diesel Fuel Tank Inspection Port

Seabuilt - Access Plate Systems These guys make aluminum inspection port kits, but not cheap. Much cheaper to make your own or maybe a local metal/welding shop.
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diesel, fuel, fuel tank, inspection

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