Has anyone had experience using a sealant or adhesive to repair a crack in a "poly" gas tank? I have tried 5200 and J/B weld. Sanded surface and cleaned with acetone prior to application, but neither would stick to plastic surface
On a Hunter 45 CC with a Yanmar engine ?b. Gasoline permeates the plastic to some extend, meaning it is INSIDE the plastic.
The OP asked about repairing a "poly" gas tank.On a Hunter 45 CC with a Yanmar engine ?
Yup. I figured that he has a leak in the plastic/poly tank for his dinghy (or gen-set) gasoline-fueled engine.The OP asked about repairing a "poly" gas tank.
Not too clear which fuel tank the OP refers to. Let's wait and see the purpose of the "gas" tank.The OP asked about repairing a "poly" gas tank.
a. The OP said gas.On a Hunter 45 CC with a Yanmar engine ?
My 1999 Hunter has a poly tank so I assumed the OP's 45 CC (later model) has a poly tank as well.if Hunter is using plastic fuel tanks, then someone on here should pipe up and clarify that for the rest of us, please.
If I could afford a 45 CC, I wouldn't be repairing an outboard fuel tank. I recently replaced the fuel tank in my 2.5 Merc outboard for about $85.00. Pretty cheap in terms of boat units.then we must be talking about an outboard fuel tank, which is not worth the effort to repair.
Always looking on the bright side of things, eh ?Probably won't hear too much from the OP is they take any kind of torch to it.
Absolutely. Way too much doom and gloom. Maybe they used a steel tank for fresh water.Always looking on the bright side of things, eh ?
First taste of boat's water on a month long excursion ........................Maybe they used a steel tank for fresh water.
uncle Ralph, I 'tol you not to drink from THAT tank.First taste of boat's water on a month long excursion ........................
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Let's see you put a positive spin on this design flaw.
Assuming this is a large fuel tank integrated into the boat AND the crack is small have you considered using some type of flanged fitting that would be normally used as a drain or fill fitting?Has anyone had experience using a sealant or adhesive to repair a crack in a "poly" gas tank? I have tried 5200 and J/B weld. Sanded surface and cleaned with acetone prior to application, but neither would stick to plastic surface
When I refer to a flange type repair, I'm thinking more of a rigid metal plate applied to a crack on a flat poly surface. The plate is held down by screws into the poly tank and there is Permatex 2 between the plate and tank. Only Permatrex 2 sticks to poly, but only as a sealant and not an adhesive. As you say, drilling the ends of the crack to remove the stress raiser is every bit as important.Drill the ends of the crack so it doesn’t get any bigger, remove enough of the area to insert the flange - fitting and put a shut off valve to seal the new fitting.