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External
Since: Jun 28, 2006
Posts: 36
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(Msg. 16) Posted: Thu Jul 20, 2006 5:52 pm
Post subject: Re: Which adhesive for (polypropelene?) 2-stroke fuel tank? [Login to view extended thread Info.]
Archived from groups: uk>d-i-y, others (more info?)
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On Thu, 20 Jul 2006 16:31:50 GMT, "Nick" <a.DeleteThis@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 |
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External
Since: Jun 28, 2006
Posts: 36
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(Msg. 17) Posted: Thu Jul 20, 2006 6:06 pm
Post subject: Re: Which adhesive for (polypropelene?) 2-stroke fuel tank? [Login to view extended thread Info.]
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External
Since: Jul 19, 2006
Posts: 8
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(Msg. 18) Posted: Thu Jul 20, 2006 6:12 pm
Post subject: Re: Which adhesive for (polypropelene?) 2-stroke fuel tank? [Login to view extended thread Info.]
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The message <qv2vb2lcgni22rnedqmafrmfd9fig4l0mv.TakeThisOut@4ax.com>
from Al Deveron <wmth2581.TakeThisOut@aol.com> contains these words:
> 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.
I've a feeling they're polyethelene, but neither is amenable to gluing.
You can weld them with hot air and a filler but it's not easy.
--
Skipweasel
Pay no attention to that man behind the curtain. >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? |
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External
Since: Jul 20, 2006
Posts: 2
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(Msg. 19) Posted: Thu Jul 20, 2006 6:24 pm
Post subject: Re: Which adhesive for (polypropelene?) 2-stroke fuel tank? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Al Deveron was thinking very hard :
> 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.
>
> What adhesive should I try next? Superglue? I also have some Golden
> Hermatite. Perhaps that would work...
None will be effective I fancy.
You said late that the threads were damaged on both items. Could you
not take the tap along to a machinists shop and ask them to clean the
threads on the tap up or even tap it down to a slightly smaller thread
size?
Then ask them to make up a brass fitting - like a threaded nut with a
large flat shoulder on it. Cut out the treaded portion in the tank then
fit the above with a soft washer impervious to fuel. In other words
trap the tank firmly between the two parts.
--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? |
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External
Since: Jul 20, 2006
Posts: 2
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(Msg. 20) Posted: Thu Jul 20, 2006 6:25 pm
Post subject: Re: Which adhesive for (polypropelene?) 2-stroke fuel tank? [Login to view extended thread Info.]
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External
Since: Jul 19, 2006
Posts: 5
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(Msg. 21) Posted: Thu Jul 20, 2006 7:02 pm
Post subject: Re: Which adhesive for (polypropelene?) 2-stroke fuel tank? [Login to view extended thread Info.]
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Al Deveron wrote:
> On Thu, 20 Jul 2006 16:37:57 +0100, "Christian McArdle"
> <cmcardle75.TakeThisOut@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
>
HOt glue might work.
Almost nothing sticks to polyolefins. >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? |
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External
Since: Jul 19, 2006
Posts: 5
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(Msg. 22) Posted: Thu Jul 20, 2006 7:05 pm
Post subject: Re: Which adhesive for (polypropelene?) 2-stroke fuel tank? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Al Deveron wrote:
> On Thu, 20 Jul 2006 15:05:29 +0100, Al Deveron <wmth2581 RemoveThis @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
>
Not unless it containsn nitromethane or acetone.
However CA comes in polythene bottles and its easy to break the dried
stuff away from it.
I have also used "liquid metal" to bond to polythene...it doesn't really
stick properly, but roughed up a bit first and forming a large fillet,
it ain't bad. >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? |
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External
Since: Jul 20, 2006
Posts: 1
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(Msg. 23) Posted: Thu Jul 20, 2006 8:42 pm
Post subject: Re: Which adhesive for (polypropelene?) 2-stroke fuel tank? [Login to view extended thread Info.]
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External
Since: Jun 28, 2006
Posts: 36
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(Msg. 24) Posted: Thu Jul 20, 2006 8:54 pm
Post subject: Re: Which adhesive for (polypropelene?) 2-stroke fuel tank? [Login to view extended thread Info.]
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External
Since: Jun 28, 2006
Posts: 36
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(Msg. 25) Posted: Thu Jul 20, 2006 8:59 pm
Post subject: Re: Which adhesive for (polypropelene?) 2-stroke fuel tank? [Login to view extended thread Info.]
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On Thu, 20 Jul 2006 19:05:58 +0100, The Natural Philosopher <a.DeleteThis@b.c>
wrote:
>> 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
>>
>Not unless it containsn nitromethane or acetone.
I'm not sure what superglue contains apart from cynoacrylate...
>However CA comes in polythene bottles and its easy to break the dried
>stuff away from it.
I don't really know which plastic the petcock and the fuel tank are
made of. Anyway, the superglue made teh two stick together like s***
to a blanket. Touch wood, my problems are solved!
Cheers,
Al D >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? |
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External
Since: Jul 20, 2006
Posts: 2
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(Msg. 26) Posted: Thu Jul 20, 2006 9:24 pm
Post subject: Re: Which adhesive for (polypropelene?) 2-stroke fuel tank? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Al Deveron" <wmth2581.DeleteThis@aol.com> wrote in message
news:qv2vb2lcgni22rnedqmafrmfd9fig4l0mv@4ax.com...
>
> 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.
>
> What adhesive should I try next? Superglue? I also have some Golden
> Hermatite. Perhaps that would work...
Loctite Plastix is supposed to bond all plastics. I tried it on a very small
part, but that didn't work. It might be OK on a relatively large item. Of
course, 100% cleanliness is a must.
Sylvain.
>
> Thank you.
>
> Al Deveron >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? |
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External
Since: Oct 02, 2004
Posts: 30
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(Msg. 27) Posted: Thu Jul 20, 2006 9:45 pm
Post subject: Re: Which adhesive for (polypropelene?) 2-stroke fuel tank? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Thu, 20 Jul 2006 18:06:53 +0100, Al Deveron <wmth2581 RemoveThis @aol.com>
wrote:
>On Thu, 20 Jul 2006 15:05:29 +0100, Al Deveron <wmth2581 RemoveThis @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.
If it is PP and superglue comes unstuck, have a look at this guide:
<http://www.loctite.us/int_henkel/loctite_us/index.cfm?&pageid=151&layout=2>
It recommends Loctite 770 as an activator, which *appears to be*
basically n-heptane:
<http://www.bmed.mcgill.ca/dept_resources/machine_shop/miscellaneous/msds/Loctite%20770%20Primer%20Prism.pdf>
Some superglue activators use it so it might be worth trying one out
on something made of PP, eg some ice cream tubs.
Another approach...
If the tap and tank *are* the same plastic and will soften and melt
with heat, another way to go could be to wind a coil of resistance
wire round the tap, put it in the tank and put a current through the
wire so it heats up and fuses the tap to the tank well. Once the
plastic is melted twisting the tap a little back and forth may help
this.
cheers,
Pete. >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? |
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External
Since: Jul 20, 2006
Posts: 1
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(Msg. 28) Posted: Thu Jul 20, 2006 10:17 pm
Post subject: Re: Which adhesive for (polypropelene?) 2-stroke fuel tank? [Login to view extended thread Info.]
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On Thu, 20 Jul 2006 15:05:29 +0100, Al Deveron <wmth2581.RemoveThis@aol.com> wrote:
>Advice please... I need to stick a plastic fuel tap into the hole in
>the bottom of a plastic 2-stroke fuel tank
Not a hope of gluing it, or of hot welding it.
Your best option is a screwed, flanged connector with a large flange on
each side and a wipe of petrol-proof elastic sealing compound on either
side (Oyltite is probably the best).
Or else replace it with a new tank, from a different engine if needs be. >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? |
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External
Since: Jul 20, 2006
Posts: 1
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(Msg. 29) Posted: Thu Jul 20, 2006 10:34 pm
Post subject: Re: Which adhesive for (polypropelene?) 2-stroke fuel tank? [Login to view extended thread Info.]
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External
Since: Jul 19, 2006
Posts: 8
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(Msg. 30) Posted: Thu Jul 20, 2006 10:51 pm
Post subject: Re: Which adhesive for (polypropelene?) 2-stroke fuel tank? [Login to view extended thread Info.]
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The message <mlqvb2li6vquj5hdn7spv70u54sbp3iq24 DeleteThis @4ax.com>
from Pete C <petecnews DeleteThis @gmail.com> contains these words:
> Some superglue activators use it so it might be worth trying one out
> on something made of PP, eg some ice cream tubs.
They're the ones with PP underneath the triangle with a 5 in it.
--
Skipweasel
Pay no attention to that man behind the curtain. >> Stay informed about: Which adhesive for (polypropelene?) 2-stroke fuel tank? |
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