Fiberglass tanks
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Fiberglass tanks

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    Member DOZZR's Avatar
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    Default Fiberglass tanks

    I didn't want to jack the dual tank thread, and I am sure this question has been adressed in detail. But where to find it is a mystery.
    So A buddy and I were at San Antonio (we both have the same year Konas') at the end of last summer and I wake up to the smell of gas "strong" I check out the boats and mine is fine, my buddies bilge on the other hand was about 3 inches deep in fuel. after a couple of hours we get it all out. and tow it in....end of the trip that weekend.
    He just patched up the hole and is still running it. And ever since that I have been worried about mine, I thoroughly checked out my tanks when I had it tore down and they were solid and no sign of seepage or weak spots at all, but since then I have heard all kinds of things that the newer gas will do to the fuel system, "buildup of the disolved resin inside the fuel lines, clogged filters, plug up the carbs, not to mention the obvious.....fuel leaks.
    So after hearing all the horror stories I am really concerned about this issue, Is this something that happens to "ALL" fiberglass tanks, or what?, I dont want to take a chance on a mid-lake bonfire, but on the other hand I am not having any of the issues that seem to go along with the tanks disolving.
    I know I should just change them out so I dont have to worry about it, but at the same time everything seems to be ok, and I really don't want to dump another 6 or 7 hundred bucks into it right now, if I dont have to. I will for sure by next season, but it is all ready to go now and I really dont want to tear back into it. Any information good and bad will be appreciated.
    John

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  3. #2
    Cas
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    Quote Originally Posted by DOZZR View Post
    I know I should just change them out so I dont have to worry about it, but at the same time everything seems to be ok, and I really don't want to dump another 6 or 7 hundred bucks into it right now, if I dont have to. I will for sure by next season, but it is all ready to go now and I really dont want to tear back into it. Any information good and bad will be appreciated.
    John
    Since you're going to replace by next season, just keep a good eye on them. In my experience, actually friends of mine, I've seen a couple get leaks and I know of one now that's all original with 0 issues in 31 years.
    For me, it would be peace of mind to put aluminum or SS in to replace the glassed tanks.
    Just keep your eye out for some good used ones as I've seen them for as low as $100.00 for 2 - 10 gal alums.

    btw, there's a couple of sets for sale on Banderlog right now

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    Senior Member 79 Tahiti's Avatar
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    Default Aluminum Tank

    I have got one right now it is off my 79 Tahiti, 40 plus shipping anywhere you want it, I am only using one, this one is perfect, no dents, dings or anything , just don't need both for the lake I am on. I think 12 gallons, I can email pictures if you are interested.

    Chet

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    Adding Ethanol to gas causes a number of concerns. This link has a lot of good info and summarizes it pretty well.

    http://my.boatus.com/forum/forum_pos...=56486&PN=%201

    Doug

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    I'm famous ! Lucky's Avatar
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    ...and yet i replaced my fiberglass tanks , only to get a pin hole in my alum. lol
    go figure
    " my carbon footprint is gonna kick your green ass"


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    Seriously off center slowride's Avatar
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    I have the original 'glass tanks in my '65 Stevens and run 50/50 91 pump gas and race fuel in the summer to reduce the % of ethanol. No problems yet......






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    Glendale Arizona Squirtcha?'s Avatar
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    Quote Originally Posted by Lucky View Post
    ...and yet i replaced my fiberglass tanks , only to get a pin hole in my alum. lol
    go figure
    Thus the name Lucky?

    Quote Originally Posted by slowride View Post
    I have the original 'glass tanks in my '65 Stevens and run 50/50 91 pump gas and race fuel in the summer to reduce the % of ethanol. No problems yet......
    I think yet is the key word here Mike.

    I've always heard about the ethanol. Not sure how true it is. All I know is my original fiberglass tanks in the Kachina broke down and had a bunch of nasty brown flakey stuff in em. I was constantly changing out my fuel filter. Then they developed a couple pin holes which turned into bigger holes, and they got changed out to stainless.

    Got a couple buddies still running the original fiberglass tanks in their Kachinas. One of the guys has developed pin holes and is leaking. The other one is fine. Both boats are about the same age 77 and a 78. Mine was a 76.

    Still.........they all lasted 30 years. That aint bad.

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    NW Spectraholic Malcolm's Avatar
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    I took the top off one of my tanks back in 06. I reglassed the baffles back in and put the top back on. While inside I noticed no evidence of dissolving resin. I didn't do a good enough job re-attaching the baffles though and they are breaking loose from bumps and high fuel loads. Live and learn...
    Malcolm

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    Member DOZZR's Avatar
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    Thanks for the input guys, I checked them out pretty thoroughly and they seem solid, so I will keep an eye out for leaks, and end of season I will have a pair made up using the ones I have now as templates,

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    Seriously off center slowride's Avatar
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    Quote Originally Posted by Squirtcha? View Post
    Thus the name Lucky?



    I think yet is the key word here Mike.

    I've always heard about the ethanol. Not sure how true it is. All I know is my original fiberglass tanks in the Kachina broke down and had a bunch of nasty brown flakey stuff in em. I was constantly changing out my fuel filter. Then they developed a couple pin holes which turned into bigger holes, and they got changed out to stainless.

    Got a couple buddies still running the original fiberglass tanks in their Kachinas. One of the guys has developed pin holes and is leaking. The other one is fine. Both boats are about the same age 77 and a 78. Mine was a 76.

    Still.........they all lasted 30 years. That aint bad.
    As I understand it alcohol (ethanol) leaches esters from the fiberglass resin breaking it down. The summer blend pump gas has a higher % of ethanol, but it's different from state to state, county to county, so I play it safe. I keep na eye out for any buildup in or under the carb indicating the resin is breaking down. Oh, and I make sure I check the floor REAL well before taking it out.
    43 years old glass tanks oughta be pertified by now.....






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