My 1973 410 seems to have a leak in the aft cabin floor mount water. I pulled the top cover and thought it used the stringers as the tank. Now I wonder if it might have been a fiberglass tank like yours. Did you have to remove the rear staircase to get at the front of the tank? I want to see if the leak could be around the hose fitting. Would like to talk to you sometime about the mission.
It looks like my 41 used the stringers as the tank, with a fiberglass tank bottom piece molded in over top of the aft bilge area, all coated in a good amount of Gel Coat, and the top of the tank was the aft cabin floor. The floor would blow out (up) when filling the tank according to Archive #4526.
So my 41 must have a fiberglass replacement tank and based on the quality of the tank I would say it was replaced under warranty as described in Archive (#4526).
This photo shows the fiberglass tank before removal. The floor under the aft steps was cut out to allow the tank to be tank to be installed, and we were able to remove it.
The board over top the tank on the right is the side of the double bed.
The floor had the aluminum cross members to stiffen it, and the floor was "bulged" up over the top of the fiberglass tank as if it was discovered to be too high when installed.
Removed bed to the left, and the floor panels back to the bathroom wall and both tank pieces were removed.
Here you can see the bottom of the original tank with much of the Gel Coat chipped off.
This photo shows how a hole was cut through the original tank to allow the outlet nozzle from the new fiberglass tank through (between the 2 vertical floor supports right above the battery cover floor.
Thanks for the photos! I will look at mine more carefully this spring/summer. One clarification about the staircase. It needs to come out or just the bottom step?
I have tried to get at the hose outlet connection on mine i the bilge by reaching back under a vertical board in the center section about aft of the transmissions. I didn't think I could loosen the hose clamp. I hold out hope it is a leak at that hose connection, not the tank structure itself.
Additional Photo
Two (2) piece tank.
Bert. Thank you for the post. What commander is this in?
Hi Sterling,
This is in FAA-41-0027R, the 27th 41 Commander built.
Sold as a 1972 model.
Bert ,
My 1973 410 seems to have a leak in the aft cabin floor mount water. I pulled the top cover and thought it used the stringers as the tank. Now I wonder if it might have been a fiberglass tank like yours. Did you have to remove the rear staircase to get at the front of the tank? I want to see if the leak could be around the hose fitting. Would like to talk to you sometime about the mission.
John Brock
'73 410
High John,
It looks like my 41 used the stringers as the tank, with a fiberglass tank bottom piece molded in over top of the aft bilge area, all coated in a good amount of Gel Coat, and the top of the tank was the aft cabin floor. The floor would blow out (up) when filling the tank according to Archive #4526.
So my 41 must have a fiberglass replacement tank and based on the quality of the tank I would say it was replaced under warranty as described in Archive (#4526).
I'll add photos shortly.
This photo shows the fiberglass tank before removal. The floor under the aft steps was cut out to allow the tank to be tank to be installed, and we were able to remove it.
The board over top the tank on the right is the side of the double bed.
The floor had the aluminum cross members to stiffen it, and the floor was "bulged" up over the top of the fiberglass tank as if it was discovered to be too high when installed.
Removed bed to the left, and the floor panels back to the bathroom wall and both tank pieces were removed.
Here you can see the bottom of the original tank with much of the Gel Coat chipped off.
This photo shows how a hole was cut through the original tank to allow the outlet nozzle from the new fiberglass tank through (between the 2 vertical floor supports right above the battery cover floor.
Thanks for the photos! I will look at mine more carefully this spring/summer. One clarification about the staircase. It needs to come out or just the bottom step?
I have tried to get at the hose outlet connection on mine i the bilge by reaching back under a vertical board in the center section about aft of the transmissions. I didn't think I could loosen the hose clamp. I hold out hope it is a leak at that hose connection, not the tank structure itself.
John Brock
My whole staircase lifts right out.
I don't have a good photo of it.
With it out I have good access to some fuel valves and the water tank outlet.