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The never ending saga with with the new fountain-help

Old 10-10-2020, 02:10 PM
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I have a raw fuel in the bildge. The size of 2 quarters. I checked all the cool fuel and no signs of
leaking I felt the back of the middle port stringer and itís wet with a fuel smell. Is it possible for the tanks to rupture and leak fuel inside the stringer to the bildge. I popped the access cover for the sending unit tank access and ZERO fuel smell.

boats a 98 35
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Old 10-10-2020, 02:21 PM
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is it efi? if it is I would put a fuel gage on the rail and turn the ignition on and watch the gage and see if it drops,the other thing you can do is put a bottle of oil dye in your tank and run the boat,then you can check with a black light for traces of fuel.
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Old 10-10-2020, 03:02 PM
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Originally Posted by boatnt View Post
is it efi? if it is I would put a fuel gage on the rail and turn the ignition on and watch the gage and see if it drops,the other thing you can do is put a bottle of oil dye in your tank and run the boat,then you can check with a black light for traces of fuel.
correct itís efi. I havnt tested the fuel rail yet but doesnít seem like much is on the backside other than the line from the cool fuel to the rail
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Old 10-10-2020, 03:04 PM
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What engines ?? might help
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Old 10-10-2020, 06:26 PM
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502 Mag MPI with cool fuel setup. non VST
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Old 10-10-2020, 06:57 PM
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It could be an injector O ring failure, there are 2 per injector, 1 on top at the rail and the second 1 in the intake manifold, check the back of the block for fuel
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Old 10-10-2020, 09:12 PM
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Originally Posted by F-2 Speedy View Post
It could be an injector O ring failure, there are 2 per injector, 1 on top at the rail and the second 1 in the intake manifold, check the back of the block for fuel
I checked under the manifold and couldnít see anything. I need to get the rail checked for pressure. If the orings do fail do they drain out of the back around the block?
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Old 10-18-2020, 07:59 PM
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I have known of a few 35s that needed fuel tanks mine included. I don’t know if it’s a coincidence or not but they all were leaking on the port side. Mine would only leak when full. We took a blow gun and put air in the vent and you could see gas bubble up thru the foam around the tank when looking down thru the access holes where the sending units are. Hopefully that’s not your problem.
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Old 10-18-2020, 08:47 PM
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Originally Posted by flat rate View Post
I have known of a few 35s that needed fuel tanks mine included. I donít know if itís a coincidence or not but they all were leaking on the port side. Mine would only leak when full. We took a blow gun and put air in the vent and you could see gas bubble up thru the foam around the tank when looking down thru the access holes where the sending units are. Hopefully thatís not your problem.
how did you fix it? Any pictures?
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Old 10-18-2020, 10:40 PM
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Originally Posted by flat rate View Post
I have known of a few 35s that needed fuel tanks mine included. I donít know if itís a coincidence or not but they all were leaking on the port side. Mine would only leak when full. We took a blow gun and put air in the vent and you could see gas bubble up thru the foam around the tank when looking down thru the access holes where the sending units are. Hopefully thatís not your problem.

did the access port smell ? Mine has zero odor. What did you pay to have the. Floor cut out and tank replaced
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