Hi Christoph,
The oil lines in the circuit do not see the pressure you see on the gauge,t
hat stays within the engine, the line from the tank via the cooler to the p
ump inlet sees SUCTION, the return line from the crankcase sees just above
atmospheric [ crankcase pressure] so you don't need fancy high pressure hos
es, but it does need to be oil resistant, and firm enough to not collapse u
nder suction. Try Jap or German Auto parts outlets, they will have hose in
that horrible foriegn measurement size ! Go for a ''name'' Brand, ie Goodye
ar, Pirelli, Conti and you won't be far wrong.
I sleeve ALL fuel and oil lines in either / both Firesleeve [ the red rubbe
ry glass lined stuff], or the silver foil covered glass sleeve, ACS or ''Bo
y Racer'' Auto stores for those.
Rather than the ''Jubilee'' worm drive clamps which have a stiff straight p
art on them that won't conform to the hose, I go for the ones with a ''swiv
el'' nut and bolt that keeps a constant curve to the clamp circumference, t
hey also have a flared rim that prevents them digging in to the hose, more
expensive than Jubilee's, cheaper than the fancy [ and unnecessary] Aeroqui
p sort.
Cheers ,
Nev
-----Original Message-----
From: Christoph Both <christoph.both@acadiau.ca>
Sent: Fri, 25 Nov 2011 17:48
Subject: RE: Europa-List: Diameter of 912 oil hose and oil hose type
Hello Europa builders:
The 912 installation manual specifies a 12-millimeter oil hose connecting t
he Rotax to the oil cooler/rotax external oil pan. 12mm hose is hard to get
in North America/Canada. =C2=BD inch hose is just a bit wider ID, so my qu
estion is, taking into account the considerable oil pressure on start up ex
ceeding 100psi, if =C2=BD inch hose is fine =93 of course, properly s
ecured with clamps. I have a CLASSIC engine installation and am concerned t
hat oil hose directly located above the muffler which, if oil starts drippi
ng is an issue with potentially starting a fire.
Question #2 then is: which hose type exactly? With the oil sump exit locate
d directly above the HOT muffler, at a close distance of less than 1 inch m
y preferred selection of hose would be stainless steel braided high pressur
e/high temperature product. Weight and not too large OD is an issue as well
(5 feet will be used for the entire circuit). I have identified Aeroquip 6
01-8 with SS outer as the most likely product ($20/foot from Aircraft Spruc
e) but before I place an order I like to hear your opinion.
Thanks,
Christoph Both
#223 Wolfville, Nova Scotia, Canada
EUROPA Classic Rotax 912S Woodcomp SR 3000, 2-blade, in perpetual state of
completion.
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