Jerry McG

On a YJ the only difference between a 15 and 20 gal tank is the length of
the vent hose insert in the tank. To convert from 15 to 20 just work the
thing out of the vent and cut it off.

One of the big issues with this is that 15 and 20 gal. sending units are not
interchangeable. Be sure you have the right one.

"Paul Brogren" <pibrogren@msn.com> wrote in message
news:breb7d$2c4ca$1@ID-190695.news.uni-berlin.de...
> Hey Tom,
>
> I went with the 15 gal. only because it was a direct replacement. I'd
never
> changed a tank out before and the 20 gallon if I remember needed some
> modifications or some different mounts or plates. Can't remember right
off
> hand. For the amount of trouble I went though I wished I'd done the 20.
>
> Tonight I hit the 33 -35 mile range since I filled up and my gauge is
almost
> a 1/3 down. I've checked the mpg and I average 13 - 14mpg. Four complete
> tanks. 500 - 600 miles driven. Thats both highway and in town. I think
I
> need to rebuild the carb. Seems I should see 15 -16 mpg. I know the
needle
> and seat have worn because I am having some hard starts after driving.
>
> --
> Thanks Always !!!
> Paul '75 CJ5 258
> Vail, CO.
> "twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
> news:tRxCb.850$CC5.669@newssvr22.news.prodigy.com. ..
> > Hmm. 4 gals. on 15 would be too much on E. Two would be perfect. Just
> > out of curiousity, why did you go with a 15 instead of a 20 gal.
> > replacement?
> >
> > Paul Brogren wrote:
> >
> > > Thanks,
> > >
> > > I probably won't mess with. It's hard to describe, but it seems that
> after
> > > fill up after fill up that the " Reserve" volume is increasing. When
it
> was
> > > first installed there was just over 2 gallons approx. at empty. Now
> theres
> > > between 3 1/2 to 4 gallons left. Trust me I love having the extra
fuel
> as a
> > > reserve, but if this is increasing I would like to know why?
> > > "twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
> > > news:EpjCb.674$CC5.362@newssvr22.news.prodigy.com. ..
> > >
> > >>I don't understand why you wouldn't want a 2+ gal. reserve. I think
it's
> > >>perfect as is. I used to have a 90 YJ Laredo that took forever to get
> > >>from a full tank to 1/3. When it hit 1/3, it would drop in about 10
> > >>miles. I ran that thing outta gas 3 times. I've got the cheap plastic
> > >>one gal. gas cans to prove it. :)
> > >>
> > >>Paul Brogren wrote:
> > >>
> > >>
> > >>>Hi all,
> > >>>
> > >>>During the summer I installed a new 15 gallon fuel tank. Also a new
> > >
> > > sending
> > >
> > >>>unit. Before the install I thought I checked the sending unit for
> > >>>calibration. It seemed okay at the time. I thought wrong. Luckily
it
> > >
> > > was
> > >
> > >>>in my favor. My gauge will go from full tank to empty on the needle,
> > >
> > > but at
> > >
> > >>>the empty mark I still have 2 -4 gallons still in the tank. I feel
> > >
> > > lucky
> > >
> > >>>that this is the case, but if I wanted to correct the error how would
I
> > >>>re-calibrate the sending unit? '75 CJ5 258
> > >>>>
> >
> > --
> > __________________________________________________ _________
> > tw
> > 03 TJ Rubicon
> > 01 XJ Sport
> >
> > "Reports that say that something hasn't happened are always interesting
> > to me, because as we know, there are known knowns, there are things
> > we know we know. We also know there are known unknowns; that is to
> > say we know there are some things we do not know. But there are also
> > unknown unknowns - the ones we don't know we don't know."
> > -- Donald Rumsfeld (2003)
> >
> > "I think that gay marriage is something that should be between a man and
> > a woman."
> > -- Arnold Schwarzenegger (2003)
> >
> > __________________________________________________ _________
> >
>
>

Jerry McG

On a YJ the only difference between a 15 and 20 gal tank is the length of
the vent hose insert in the tank. To convert from 15 to 20 just work the
thing out of the vent and cut it off.

One of the big issues with this is that 15 and 20 gal. sending units are not
interchangeable. Be sure you have the right one.

"Paul Brogren" <pibrogren@msn.com> wrote in message
news:breb7d$2c4ca$1@ID-190695.news.uni-berlin.de...
> Hey Tom,
>
> I went with the 15 gal. only because it was a direct replacement. I'd
never
> changed a tank out before and the 20 gallon if I remember needed some
> modifications or some different mounts or plates. Can't remember right
off
> hand. For the amount of trouble I went though I wished I'd done the 20.
>
> Tonight I hit the 33 -35 mile range since I filled up and my gauge is
almost
> a 1/3 down. I've checked the mpg and I average 13 - 14mpg. Four complete
> tanks. 500 - 600 miles driven. Thats both highway and in town. I think
I
> need to rebuild the carb. Seems I should see 15 -16 mpg. I know the
needle
> and seat have worn because I am having some hard starts after driving.
>
> --
> Thanks Always !!!
> Paul '75 CJ5 258
> Vail, CO.
> "twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
> news:tRxCb.850$CC5.669@newssvr22.news.prodigy.com. ..
> > Hmm. 4 gals. on 15 would be too much on E. Two would be perfect. Just
> > out of curiousity, why did you go with a 15 instead of a 20 gal.
> > replacement?
> >
> > Paul Brogren wrote:
> >
> > > Thanks,
> > >
> > > I probably won't mess with. It's hard to describe, but it seems that
> after
> > > fill up after fill up that the " Reserve" volume is increasing. When
it
> was
> > > first installed there was just over 2 gallons approx. at empty. Now
> theres
> > > between 3 1/2 to 4 gallons left. Trust me I love having the extra
fuel
> as a
> > > reserve, but if this is increasing I would like to know why?
> > > "twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
> > > news:EpjCb.674$CC5.362@newssvr22.news.prodigy.com. ..
> > >
> > >>I don't understand why you wouldn't want a 2+ gal. reserve. I think
it's
> > >>perfect as is. I used to have a 90 YJ Laredo that took forever to get
> > >>from a full tank to 1/3. When it hit 1/3, it would drop in about 10
> > >>miles. I ran that thing outta gas 3 times. I've got the cheap plastic
> > >>one gal. gas cans to prove it. :)
> > >>
> > >>Paul Brogren wrote:
> > >>
> > >>
> > >>>Hi all,
> > >>>
> > >>>During the summer I installed a new 15 gallon fuel tank. Also a new
> > >
> > > sending
> > >
> > >>>unit. Before the install I thought I checked the sending unit for
> > >>>calibration. It seemed okay at the time. I thought wrong. Luckily
it
> > >
> > > was
> > >
> > >>>in my favor. My gauge will go from full tank to empty on the needle,
> > >
> > > but at
> > >
> > >>>the empty mark I still have 2 -4 gallons still in the tank. I feel
> > >
> > > lucky
> > >
> > >>>that this is the case, but if I wanted to correct the error how would
I
> > >>>re-calibrate the sending unit? '75 CJ5 258
> > >>>>
> >
> > --
> > __________________________________________________ _________
> > tw
> > 03 TJ Rubicon
> > 01 XJ Sport
> >
> > "Reports that say that something hasn't happened are always interesting
> > to me, because as we know, there are known knowns, there are things
> > we know we know. We also know there are known unknowns; that is to
> > say we know there are some things we do not know. But there are also
> > unknown unknowns - the ones we don't know we don't know."
> > -- Donald Rumsfeld (2003)
> >
> > "I think that gay marriage is something that should be between a man and
> > a woman."
> > -- Arnold Schwarzenegger (2003)
> >
> > __________________________________________________ _________
> >
>
>

Jerry McG

On a YJ the only difference between a 15 and 20 gal tank is the length of
the vent hose insert in the tank. To convert from 15 to 20 just work the
thing out of the vent and cut it off.

One of the big issues with this is that 15 and 20 gal. sending units are not
interchangeable. Be sure you have the right one.

"Paul Brogren" <pibrogren@msn.com> wrote in message
news:breb7d$2c4ca$1@ID-190695.news.uni-berlin.de...
> Hey Tom,
>
> I went with the 15 gal. only because it was a direct replacement. I'd
never
> changed a tank out before and the 20 gallon if I remember needed some
> modifications or some different mounts or plates. Can't remember right
off
> hand. For the amount of trouble I went though I wished I'd done the 20.
>
> Tonight I hit the 33 -35 mile range since I filled up and my gauge is
almost
> a 1/3 down. I've checked the mpg and I average 13 - 14mpg. Four complete
> tanks. 500 - 600 miles driven. Thats both highway and in town. I think
I
> need to rebuild the carb. Seems I should see 15 -16 mpg. I know the
needle
> and seat have worn because I am having some hard starts after driving.
>
> --
> Thanks Always !!!
> Paul '75 CJ5 258
> Vail, CO.
> "twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
> news:tRxCb.850$CC5.669@newssvr22.news.prodigy.com. ..
> > Hmm. 4 gals. on 15 would be too much on E. Two would be perfect. Just
> > out of curiousity, why did you go with a 15 instead of a 20 gal.
> > replacement?
> >
> > Paul Brogren wrote:
> >
> > > Thanks,
> > >
> > > I probably won't mess with. It's hard to describe, but it seems that
> after
> > > fill up after fill up that the " Reserve" volume is increasing. When
it
> was
> > > first installed there was just over 2 gallons approx. at empty. Now
> theres
> > > between 3 1/2 to 4 gallons left. Trust me I love having the extra
fuel
> as a
> > > reserve, but if this is increasing I would like to know why?
> > > "twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
> > > news:EpjCb.674$CC5.362@newssvr22.news.prodigy.com. ..
> > >
> > >>I don't understand why you wouldn't want a 2+ gal. reserve. I think
it's
> > >>perfect as is. I used to have a 90 YJ Laredo that took forever to get
> > >>from a full tank to 1/3. When it hit 1/3, it would drop in about 10
> > >>miles. I ran that thing outta gas 3 times. I've got the cheap plastic
> > >>one gal. gas cans to prove it. :)
> > >>
> > >>Paul Brogren wrote:
> > >>
> > >>
> > >>>Hi all,
> > >>>
> > >>>During the summer I installed a new 15 gallon fuel tank. Also a new
> > >
> > > sending
> > >
> > >>>unit. Before the install I thought I checked the sending unit for
> > >>>calibration. It seemed okay at the time. I thought wrong. Luckily
it
> > >
> > > was
> > >
> > >>>in my favor. My gauge will go from full tank to empty on the needle,
> > >
> > > but at
> > >
> > >>>the empty mark I still have 2 -4 gallons still in the tank. I feel
> > >
> > > lucky
> > >
> > >>>that this is the case, but if I wanted to correct the error how would
I
> > >>>re-calibrate the sending unit? '75 CJ5 258
> > >>>>
> >
> > --
> > __________________________________________________ _________
> > tw
> > 03 TJ Rubicon
> > 01 XJ Sport
> >
> > "Reports that say that something hasn't happened are always interesting
> > to me, because as we know, there are known knowns, there are things
> > we know we know. We also know there are known unknowns; that is to
> > say we know there are some things we do not know. But there are also
> > unknown unknowns - the ones we don't know we don't know."
> > -- Donald Rumsfeld (2003)
> >
> > "I think that gay marriage is something that should be between a man and
> > a woman."
> > -- Arnold Schwarzenegger (2003)
> >
> > __________________________________________________ _________
> >
>
>