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Author Topic: Fuel Tanks  (Read 332 times)

October 24, 2023, 09:51:29 AM
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redtail14

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  • FL - North Area
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    • Deep Dive Spear Crew
Fuel Tanks
« on: October 24, 2023, 09:51:29 AM »
Opinion on replacement fuel tanks.. Poly (does the material react with foam around it) or stay with aluminum... Just took the original 1972 aluminum one out.

@deepdivespearcrew1348 on youtube

October 25, 2023, 04:51:16 AM
Reply #1

RickK

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Re: Fuel Tanks
« Reply #1 on: October 25, 2023, 04:51:16 AM »
Poly reacts to gasoline and grows 1-2% in all directions when initially exposed to gas. You have to allow for this growth. It grows but doesn't shrink back.  Poly also leaches out gas fumes. Just so you know.
Rick
1971 "170" with 115 Johnson (It's usable but not 100% finished)

1992 230 Explorer with 250 Yamaha

October 25, 2023, 10:09:51 AM
Reply #2

rhtrades

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Re: Fuel Tanks
« Reply #2 on: October 25, 2023, 10:09:51 AM »
Do you know if AS used foam to secure their poly tanks or secure it by other means?   

October 25, 2023, 03:24:39 PM
Reply #3

RickK

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Re: Fuel Tanks
« Reply #3 on: October 25, 2023, 03:24:39 PM »
That I can't tell you but I'm sure some of our members can chime in on this.
Rick
1971 "170" with 115 Johnson (It's usable but not 100% finished)

1992 230 Explorer with 250 Yamaha

October 25, 2023, 05:25:30 PM
Reply #4

kleary4

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Re: Fuel Tanks
« Reply #4 on: October 25, 2023, 05:25:30 PM »
I replaced the stock Aluminum tank in my 1975 19-6 with an off-the-shelf poly.  I really like the new system, and it saved the time and trouble of working with a fabricator.  But there were a couple of compromises:

-  I went all the way down from 40+ gallons to 25 gallons to find one that fits in the coffin.  That's not a big problem for the way I use the boat.  But it may be for you.

-  The fill fitting location required a TIGHT bend in the fill line.  So venting during fueling can be a problem.  Gotta take it slow.

- The pickup location is at the very front of the tank.  So if you're running near empty, and want to keep the bow up for a dry ride, then you may scare yourself when the motor sputters.  Not that that has happened to me ... :)

I was able to re-use the stock aluminum straps in the coffin to secure the tank.  I used rubber strips and shaped some spacers out of pressure-treated lumber to get everything snug, but not over-tightened.  Good luck with our re-fit
1975 19-6
2002 Honda 90 Outboard
2021 Fishmaster Pro Series T-Top
(Upgrade every 20 or 30 years whether she needs it or not)

October 27, 2023, 10:29:58 AM
Reply #5

rhtrades

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Re: Fuel Tanks
« Reply #5 on: October 27, 2023, 10:29:58 AM »
Thank you!

March 25, 2024, 10:49:22 AM
Reply #6

Thunderdan1018

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  • 1972 19-6 Three Two One
Re: Fuel Tanks
« Reply #6 on: March 25, 2024, 10:49:22 AM »
kleary4
do you happen to have a link to the tank you got?

 

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