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larry(at)macsmachine.com
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 Posted: Wed Sep 05, 2007 3:46 pm Post subject: water pump anyone? |
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Hi Guys,
I decided to buy a water pump for the Stratus Subaru EA-81 as these tend
to fail with some warning, but on their own schedule. So it seemed
prudent to have spare parts, belts, plugs, filters, etc. The EA-81 has
been a great performer with exceptional economy. I ordered a water pump
for $26.00 at my local auto parts store. For the car data, it turned out
not to be the correct one. The pulley (which was not included) was to be
fastened with 4 bolts (not included) and the later than 1984 design
pressed steel impeller is reported to self-destruct at high rpm. I
visited *O’Reilly’s auto parts web site and found that the part number
for the correct pump is* *57-1042*. This pump has the preferred cast
impeller, the correct mushroom shaped pulley (attached) and it is listed
for $26.99 less $3.00 core-exchange if you happen to need one.
Data used for both was “*Brat 1.8 pickup truck 1982-1987*”.
Another source part number for it is 53105, GMB water pump.
Both are built by Cardone Industries.
Stratus only provides Atsugi as "Specification" for the pump which is
interpreted to mean it has "its own" characteristics.
No one flies 100 horsepower pound for pound as inexpensively as the
Subaru EA-81.
Tuck this info into your Stratus manual or reference information and
avoid the 48 hours of bewilderment.
Happy flying guys,
Larry McFarland 601HDS at www.macsmachine.com
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larry(at)macsmachine.com
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| Posted: Thu Sep 06, 2007 6:46 am Post subject: water pump anyone? |
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Hi Frank,
I don’t think there’s anything to prevent the EA-81 Subaru from reaching
2500 hours with proper maintenance. I’ve witnessed several of $22K certified
engines” at our airport going thru overhaul at $7 to $9K, getting new
magnetos
at $1K and requiring other parts that are just breathtakingly expensive.
The Subaru needs about $500 parts to do an overhaul. I’m able to
selectively burn
3.5 to 4.5 gal per hour of 87-octane at <$3/gal. Our field’s 100LL is
over $4.50 gal.
You only have to do the numbers to see the economy of this engine.
I agree that the $600 heads rework by Ram Performance was necessary for
peace of mind.
The most satisfying part of the Subaru is it’s very quiet, relative to
my friends RV6 certified
air-cooled engine. The OHV Subaru has a distinctive sound that says smooth.
Recent data shows the 100 hp Subaru has as much or more hp per pound
than 100 hp certified engines.
Step up to a $14K 3300 or a $22K 0360 and it’s a whole other story, The
$7K paid for the Stratus
engine is matched by a low price for any part on it, and it’s mostly
locally available. Spark plugs are still $2.25.
What more could one ask of it, perhaps, just be able to go faster?
Everything has an appropriate price.
Then, it becomes your preference.
I’m very pleased with the Stratus Subaru and I'd do it again in a heartbeat.
Larry McFarland 601HDS at www.macsmachine.com
Hinde, Frank George (Corvallis) wrote:
| Quote: |
Oh don't you just love a naysayer...but here goes..
Your last statement about the economy. I don't think you can really say
that Larry until you know how long Stratus lasts.
Secondly, if your simply comparing fuel costs then airplane motors (at
least fuel injected ones) can be run more economically than the Stratus
simply because you can run the engine lean or peak exhaust as
temperature.
My 190Hp IO360 will normally run 10GPH but that can be got doen to 7gph
running on the lean side of peak EGT...this has a significant effect on
fuel caosts and as almost all airplane motors can be run on auto fuel
then the comparison could be a lot closer than you might think.
On the whole though, with sorted valve guides, the Stratus setup is a
sweet little motor.
All the best
Frank
601HDS 400 hours
RV7a IO360 21o hours in one year...YIKES!
No one flies 100 horsepower pound for pound as inexpensively as the
Subaru EA-81.
Happy flying guys,
Larry McFarland 601HDS at www.macsmachine.com
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