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  #1  
Old 12-08-2012, 04:10 PM
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Plastic Fuel Tank Repair

I have an old 2hp boat motor that has a crack in the fuel tank. What over the counter products have you guys used for repairs? The motor is very old and they don't make this fuel tank anymore.

Thanks
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Old 12-08-2012, 09:09 PM
agrostis agrostis is offline
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2 HP ? What is that, a trolling motor ? A cracked fuel tank, for a boat ? Time for a new motor if you can't find a tank. I wouldn't trust any repair for something that hold's gas.
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Old 12-08-2012, 10:13 PM
DEPENDABLE LANDSCAPING DEPENDABLE LANDSCAPING is offline
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We have used jb weld on a few tanks. It has held well for us.
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  #4  
Old 12-09-2012, 10:44 AM
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Yes it's a boat motor, use it on a 10 ft john boat. Runs like a top.

The JB weld for plastic that I found, says not to use on gas tanks. I did find a product called Seal-All, it's Gas & Oil resistant. Going to give it a shot.

I empty the fuel tank when not in use, so this might work. Think I'll try fixing my cracked windshield wiper reservoir on the work truck too.
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  #5  
Old 12-10-2012, 12:30 PM
rlitman rlitman is offline
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No adhesive will work on a gas tank. Don't bother.

If the tank is plastic, it can possibly be plastic welded.

Was the crack due to damage, or do you not know how the crack happened?
I ask, because if it was just a plastic tank that got hit, you can weld the crack shut, but if it is old sun-damaged plastic, one crack may be just the tip of the iceberg.
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Old 12-10-2012, 12:51 PM
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Quote:
Originally Posted by rlitman View Post
No adhesive will work on a gas tank. Don't bother.

If the tank is plastic, it can possibly be plastic welded.

Was the crack due to damage, or do you not know how the crack happened?
I ask, because if it was just a plastic tank that got hit, you can weld the crack shut, but if it is old sun-damaged plastic, one crack may be just the tip of the iceberg.
It appears it may have been dropped at some point in time. It was left at a home my mom had recently bought. I cleaned the carb, put a little gas in it, fired up first pull.

The tank itself is covered, so I don't think it was caused from sun damage. Doesn't appear or feel brittle in the least.

I already repaired it with the Seal All. To late not too. lol If it doesn't work, I'll look into getting it plastic welded. Thanks for your input.
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Old 12-10-2012, 03:29 PM
rlitman rlitman is offline
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Well, if the gas causes the glue to fail, it will probably just peel off, so that shouldn't stop you from welding the plastic down the road. The bigger issue with welding a gas tank, is the hazard of the gas itself.

There's a big difference between "gas resistant", and something that can be used to repair a gas tank, but please report back in a few months, if your results were successful.
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  #8  
Old 12-10-2012, 03:32 PM
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Can you take it off , wash it out real good and hit it with a propane torch and try to melt the plastic together?
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  #9  
Old 12-10-2012, 03:34 PM
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Will do after we have used it a bit. Fingers crossed. lol
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  #10  
Old 12-10-2012, 07:31 PM
mcdc6 mcdc6 is offline
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Fiberglass. Never had a problem yet. Fixed all kinds of tanks that way. Just prep, prep and prep again.
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