The gates hose was never the problem. The plastic filter was installed where
the
hose immediately bent after the barb. Heck of a way to install, especially
with a plastic $2.00 filter. When he cranked down on the hose clamp he flexed
the hose and the filter snaped. The Breezer was a ELSA and we think it may
have been an owner operator installation issue as it was the first Breezer I had
seen come through here. No plastic part should ever be held in bending. That
was dumb.
As far as hose clamps go, we use what we call Breeze clamps rather than the
garden
hose type. They look the same but are more robust and the screw doesn't
protrude
into the hose. However, expediency sometimes dictates the automotive
supply shop "only has this type", and on the smaller vent hoses the cheap
Chinese
knock off Breeze type clamps will get used when the client comes with them.
You are right, the cheap knock off open cut clamps when over tightened can
cut the hose, and the rubber can poke through the gap or they just break.
Nasty.
I have moved on hose exchanges to the newer style silicone hose lined clamps
supplied by my hose vender. Easy to use, a bit heavy, protects the hose.
The name on them is AC Delco but I also see Ideal. They work fine on 5/16 hose
but not on 1/4 inch. Then the compression or Oetiker clamp comes in handy
for those.
Why do I choose not to like compression style clamps? Because I do not like to
use them in a low pressure carbureted system hose when it comes to removal.
They get stuck on the hose and are a pain to get off when the client
overtightens
and the barb end gets buried in the hose. Especially when repositioning,
which occurs during the learning phase. It's like the clamps on the 11mm
crossover
tube on the Rotax. Trying to find new hose that doesn't cost $10 a foot
plus shipping is a pain over here. So, I prefer the Ideal or Dayco lined clamps
for my main lines on a change out as I've gone to all 5/16 hose in the Europa
so only one fuel line is in the plane. Easier to buy/replace come hose change
time. I'm lazy.
Although many LSA manufacturers are going to the crimp type or Oetiker clamp in
production. From a production point of view I can see them, but I'm not excited
about the fact they are one time use. Probably because during fabrication
you take it apart and put it together a couple times. I can see the point that
if the clamp area is easily accessed, getting a tool in there is not a problem.
I've never had a leak with an Oetiker clamp, but then again, I'm not going
to use them on a fuel filter.
That is why I prefer to do my bosses now with all the joints on the end of the
boss and minimize the clamps. We can do that in the US on our own. Others have
to ask or get permission for a deviation. Shame.
On my filters I use the Colder products quick disconnects. I have a love/hate
relationship with them, but for 20 years they only require new O rings on the
male ends and have never leaked unless the O ring gets cut. That is why I also
hate them. The stupid locking collar will cut the O ring if care is not taken.
That way the hose clamps go on and stay on for 5 years on the quick disconnects.
Note, I'm on year 7 with the hoses in 12AY with the lined EPA lined R7 or better
carb hose. It is really holding up very well. It is still supple, no cracking
seen on the ends, and no checking at the clamps. So, the original 1997 Europa
supplied Ideal clamps of steel will probably corrode off before the hose
starts looking bad. Maybe next year I'll do a hose change. Maybe not?
I'm getting older and the hose change requirement must be met to comply with the
Rotax manual on my 914. Every one of my cooling hoses has the original style
compression clamps and frankly, in Florida they are corroding just a bit now
and I can't stand to look at them. Time to upgrade, probably spring clamps on
the cooling hoses I guess with all new engine and airframe hoses and clamps.
That's two to three days work at my pace now days.
Best Regards,
Bud Yerly
-----Original Message-----
From: owner-europa-list-server@matronics.com
<owner-europa-list-server@matronics.com>
On Behalf Of Griffo
Sent: Wednesday, May 12, 2021 7:42 PM
Subject: Europa-List: Re: Water Drain
All good comments Bud and I would never suggest you change from the "tried &
true"
if you are happy to stay with it.
Just wanted to let you know, that in my opinion, a better alternative is now
available.
A few points;
Your A&P should understand that the hose size must be correct for the fittings
and that the hose clamp is primarily for security (hose retention) not leak
prevention.
Further, tightening hose clamps to the level suggest by your story can only lead
to damaged leaking hoses.
Don't know why the FI hoses would be so hard - I use exclusively Gates FI fuel
hose (made by good old Uncle Sam), in 12 years have never had a problem with
fitting or leaking.
I also noticed your photos show regular "garden" type hose clamps - my advise
- change to FI hose clamps (even if you dont want to use FI hose)
--------
46
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