Which adhesive for (polypropelene?) 2-stroke fuel tank?

Christian McArdle wrote:

> >> Personally, as such a safety critical item, I would be looking for a
> >> new replacement for the entire tank.
> >
> > Unfortunately, that could take some time, since parts for this
> > obsolete motor are hard to find. I'm just looking for a quick fix
> > that's quick, cheap and reasonably secure.
>
> You might be able to find a generic tank and tap a new hole into it (or with
> a correctly formed outlet already there). Is the tank some weird and
> wonderful shape, or would any old unit do?
>
> Christian.

You might be able to reinstate the thread using one of those
whatnots... a metal spiral, forget the name. Or maybe make a ring that
screws in, and the tap screws into that. Etc.

One thing you dont want is fuel pouring out, so I'd make it tough and
secure.


NT
 >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? 

Al Deveron wrote:

> I figure there must be something more suitable than Araldite...

I figure you dont want to hear it. You could save yourself a lot of
wasted time experimenting.


NT
 >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? 

On 20 Jul 2006 08:21:51 -0700, meow2222.RemoveThis@care2.com wrote:

>no adhesive will work*, find another way to do it.
>
>* unless youre willing to remove, empty, steam clean the tank, then
>flame the area to create a suitable surface for bonding.

Aha, yes! Bonding with a soldering iron might work... Could be a mess
if it fails though...

Thanks,

Al D
 >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? 

> Advice please... I need to stick a plastic fuel tap into the hole in
> the bottom of a plastic 2-stroke fuel tank (the tank looks like
> polypropelene) on an outboard motor. The fuel tap was originally a
> screw-in job but a previous owner stripped the threads. I used
> Araldite last time, but it didn't hold very well.

Personally, as such a safety critical item, I would be looking for a new
replacement for the entire tank.

Christian.
 >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? 

On Thu, 20 Jul 2006 16:37:57 +0100, "Christian McArdle"
<cmcardle75.DeleteThis@nospam.yahooxxxx.co.uk> wrote:

>Personally, as such a safety critical item, I would be looking for a new
>replacement for the entire tank.

Unfortunately, that could take some time, since parts for this
obsolete motor are hard to find. I'm just looking for a quick fix
that's quick, cheap and reasonably secure.

Al D
 >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? 

>> Personally, as such a safety critical item, I would be looking for a
>> new replacement for the entire tank.
>
> Unfortunately, that could take some time, since parts for this
> obsolete motor are hard to find. I'm just looking for a quick fix
> that's quick, cheap and reasonably secure.

You might be able to find a generic tank and tap a new hole into it (or with
a correctly formed outlet already there). Is the tank some weird and
wonderful shape, or would any old unit do?

Christian.
 >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? 

On Thu, 20 Jul 2006 16:52:40 +0100, "Christian McArdle"
<cmcardle75.DeleteThis@nospam.yahooxxxx.co.uk> wrote:

>You might be able to find a generic tank and tap a new hole into it (or with
>a correctly formed outlet already there). Is the tank some weird and
>wonderful shape, or would any old unit do?

The tank is a rather specific shape. It has to fit inside the outboard
motor's upper alloy casing, and the cap has to coincide with a hole in
the alloy casing.

But thank you for the suggestion.

Realistically, I'm just looking for the best way to use the current
tank. Surely some kind of goo or adhesive will form a leakproof joint
between the stripped petcock and the stripped hole in the tank...

Al D
 >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? 

On 20 Jul 2006 09:02:37 -0700, meow2222.DeleteThis@care2.com wrote:

>You might be able to reinstate the thread using one of those
>whatnots... a metal spiral, forget the name. Or maybe make a ring that
>screws in, and the tap screws into that. Etc.

Thanks; that might be the ideal solution, but it's more tricky and
time-consuming than I want to get involved with.

>One thing you dont want is fuel pouring out, so I'd make it tough and
>secure.

Yes, within reason. I did use Araldite previously. It got me out of
trouble, but, of course, there was no real adhesion there, so it was
only hanging in there on a wing and a prayer.

I figure there must be something more suitable than Araldite...

Al D
 >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? 

<meow2222 DeleteThis @care2.com> wrote in message
news:1153411357.265916.36870@m79g2000cwm.googlegroups.com...
<snip>

> You might be able to reinstate the thread using one of those
> whatnots... a metal spiral, forget the name. Or maybe make a ring that
> screws in, and the tap screws into that. Etc.
<snip>

============================
'Helicoil' - I'm not sure if they work in plastic but worth asking from a
stockist.

Cic.
 >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? 

I would try a large diameter, short brass nut, washers and bolt into a tight
fitting hole with a "suitable-for-fuel rubber" washer each side - then drill
and tap the brass bolt and screw in the (or a new) petrol tap.
This assumes you can get a nut into the right position and it will self hold
whilst tightening up ( use loctite ).

If not, and this assumes the plastic is thick enough, drill and tap a larger
hole and either fit a petrol tap in direct, or a bolt which you can then
drill and tap perhaps with a washer on the outside to strain relieve a bit.

Or as the others suggest - get a new or s/hand one but then thats not
D-I-Y...

Also depends on "what if it leaks" - a lawn mower/ outboard motor I wouldn't
worry so much, but if it leaks somewhere where vapours could collect, go the
new route.

Nick
 >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? 

On Thu, 20 Jul 2006 16:31:50 GMT, "Nick" <a.RemoveThis@b.com> wrote:

>I would try a large diameter, short brass nut, washers and bolt into a tight
>fitting hole with a "suitable-for-fuel rubber" washer each side - then drill
>and tap the brass bolt and screw in the (or a new) petrol tap.

Unfortunately, the thread is stripped off the plastic petrol tap too.
But tapping new threads is more trouble than it's worth. Thanks for
the suggestion, though. I really just need a quick fix until such time
as I can obtain a second, identical motor to butcher for spares.

>Also depends on "what if it leaks" - a lawn mower/ outboard motor I wouldn't
>worry so much, but if it leaks somewhere where vapours could collect, go the
>new route.

It wouldn't be the end of the world if it started to leak a drop or
two every 30 minutes ro so, since it is an outboard motor hanging off
the back of a boat.

However, I reckon it should be possible to jerry-rig it so that it
doesn't leak at all. Last time, I fixed it in with Araldite. It didn't
leak at all - but it wasn't very strong either. The tap pulled out too
easily. I reckon there must be some adhesive - or other goo - that
will give some adhesion and be impervious to 2-stroke mix. Red
Hermatite? Golden Hermatite? Superglue? Uhu? The fit is still pretty
snug despite the lack of threads.

BTW, I'm not at all sure what kind of plastics the tank and petcock
are. They may well be something other than polypropylene. Nylon,
possibly. One thing's for sure: they look like the sort of plastic
that's not easy to stick together!

Al D
 >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? 

On Thu, 20 Jul 2006 17:06:20 +0100, Al Deveron <wmth2581.RemoveThis@aol.com>
wrote:

>On Thu, 20 Jul 2006 16:52:40 +0100, "Christian McArdle"
><cmcardle75.RemoveThis@nospam.yahooxxxx.co.uk> wrote:
>
>>You might be able to find a generic tank and tap a new hole into it (or with
>>a correctly formed outlet already there). Is the tank some weird and
>>wonderful shape, or would any old unit do?
>
>The tank is a rather specific shape. It has to fit inside the outboard
>motor's upper alloy casing, and the cap has to coincide with a hole in
>the alloy casing.
>
>But thank you for the suggestion.
>
>Realistically, I'm just looking for the best way to use the current
>tank. Surely some kind of goo or adhesive will form a leakproof joint
>between the stripped petcock and the stripped hole in the tank...
>
>Al D
<x-post snipped>

I once bodged the tank on an old range rover using a stick of 2 part
epoxy, (cut a bit off, knead it together until 2 parts are mixed sort
of stuff) that I got from RS www.rswww.com, which the original
supplier reckoned was fuel proof.

Seemed to work OK.

HTH

David
 >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? 

On Thu, 20 Jul 2006 15:05:29 +0100, Al Deveron <wmth2581 DeleteThis @aol.com>
wrote:

Update:
I just tried sticking it in with Superglue. It formed an incredibly
strong joint (much stronger than Araldite did). I just hope that the
2-stroke fuel won't weaken it.

Al D
 >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank?