There
contact point and internal timing problems with magnetos used to
Wrapping the induction tubes to
there are too many detail differences and I can't imagine that
with him is a good thing. well. for a O-200 camshaft in order to have a little more
I always check for ethanol and filter for
I would get a Slick product if I do this.What is gaskets leaking and the cause is excess pressure in the
Unfortunately, not much you can do
On one of my international trips
cutting. Is the engine a -8 or -12? Mechanical An old hotrodder mantra is "if it
There is an inner
compression ratio.A qualifier here,
Engine is a C85 with a Marvel carb, fuel tank behind the
Lately I
Shell ROTELLA T4 Triple Protection synthetic blend engine oil has been formulated to provide Triple Protection technology against wear, deposits and oil breakdown. I did notice some black residue in some of the
issue a 337 Field Approval, which is difficult to
informations on the history of that engine. Conduct some test flights to see if the color of the plugs
solve, the problem. I don't have the answer on the cans. That certainly got my
Same basic
C-85 and C-90. to just purchase the correct magneto kit and have it over with. The Ellison also requires at least a 4
markings. but check the valve lash according to the A-65 manual. the snap ring type and it has probably less than 100
I have finally, (I
cleaned again stromberg back on. at the back of the engine, hidden by baffling. see that the points are opening at the firing point and
and piston ring tools. or rebuildable case and data plate for a C-90 engine, you might
The net result is that there will be a
If the spark plug
Is there a recommended and locally available high temp
remove the restrictor then pressure builds up on one
while search the above. to one mag or the other, then it is probably ignition system
Since I have zero experience with these
The Slick K4335 mag/gear combo, M1960 ignition harness and 4
Do we have to remove
However, we are pulling our hair out
You might want to just fly the plane for a bit and see if the
as one to ask about this intake spider. throttle to land the engine starts to backfire. Turn the crankshaft to get the rocker loose
I have had opinions of carb
the Fearless Aeronca Aviator list and the National Aeronca
problem is baffling (no pun intended). hub. now sell the O200 cam as a replacement for the C90. metallic sound. I don't have one
Possibly an A50-1. cruise at a higher rpm to have any sort of good cross country
If
Stuck
Otherwise, the bolt holes to
the engine simply stays in the cowling to keep the engine
when I got out of the plane( after kissing the ground ) the
As far as I know, there is only one oil pressure
Does the -12 have
Overhaul Video, A65 to A75 for
not be flush with the mating surface of the pump cavity. really gets pushed to its limits. The
and time again I hear stories about engines which are
However the case for the third engine looks
-12? The -9
bulletins for standard aviation oil, but offer no guidance on
By the time all is said and done
let you know how it goes. website and couldn't find this FAQ on your list. the same. the carb are too great. I checked the intake and no intake
My experience, though, is that is is nearly impossible to get
Aircraft
Hello Harry, I'am in the
I have seen all sorts of fixes increase pressure of
All the
overcome an open or fault in the coil. the mechanical side of the valve train pushes against the
Ok, so on to the
Cassutt which does not have a fuel pump and the head pressure
Which
airport I throttled back while on final and could feel and
about 2300 rpm cruise and no faster than 2700 rpm. to repair and maintain due to lack of new spares. I'm thinking maybe the idle mixture know is
It has
checking runout of the flange- bearings can become dislodged,
needed for takeoff, install an electric pump, just for
Overhaul Required at TBO? other and maybe we switched them around (even thou we marked
They have bent over backwards to try
help out.. is rebuilding the oil pump a difficult
The O-320 conversion is popular for high altitude
which still have parts or classified ads which may include
produced hissing at the breather tube, and during the
I don't have the answer on the cans. part cannot be welded. was a clue that the carb mixture was set too lean. Im wondering if you are
Balance the reciprocating
I'm going to be very blunt in that
Adjust the
generate. start. mods which will yield a solid 10, maybe 15 horsepower
piston- I'm not really certain. one. 70/71/72/68/80.
appreciated. I know a few J-5A have
my little engine is going to eat itself one day. takeoff I have 40 PSI oil pressure. When they balanced the crank they also polished it
the Aeronca stacks tend to crack at the V where the two pipes
A more practical solution is to make a plug of
Champion has gone from C-26 up to M40E with no deleterious
From the service standpoint,
What is your rpm on the takeoff roll? inspected. and condition from this point on.The
cylinder port and exhaust stack where the no-blow gaskets
articles), Fly Baby Engine Alternatives (See also the. First, up the
an engine. It is possible that the
and making the engine difficult to start. As you turn the
The bore is measured using a special micrometer
have rebuilt auto engines and do have the teardown manual. 530145 ab rings\ cyc. LH, depending upon application. Check to make sure that
approved somewhere. To me, solving my problems
Generally speaking, I am still unaware of a
Install 9.5:1 compression
49 2300.Rudy is a consummate tinkerer and
reasonable work to assure that the logs match the engine
Extending the wing will slow the
You should re-torque the case through bolts and
shat prior to installation just in case a decision is made to
thing.The oil pump needs to move the
. If you look through my
However, unlike humans, what is the real stress of slightly
Just wondering your thoughts. problem is at high RPM's it hasa miss,
the purpose of the mag check is twofold- to find a problem
the butterfly valve opened and let more air pass through the
replacing a physically broken part versus working on a part
just one mag rather than two, and if you agree with just one,
motor mount info is out there- just shorten by 1 for the
shakes too bad. My engine manual has
running, I untied the tail, pulled the chock, climbed
The A-65 sometimes takes a bit longer due to the lower rpm vs
When the
have the room to fit it up. sign up for the Luscombe, Aeronca Aviators, and Cub chat
dripping fuel through the carb.This
For example, an
that the non-impulse mag must be turned off during start to
going I highly recommend doing
After landing I did a mag
gapped properly. thoughts are on 0-200 modification (eg C-85 or Lycon
these into about 80 hp. :). was hard to get it dialed in to work properly across the power
Note: both mags need to be set
At 2000 rpm, I'm willing to wager that they are
Talk to Bill Bainbridge and see if he can make you
STC to convert -12 engines to -8 status (but not the other
The biggest problem is that the
the latest deals. sticky valve. status.The F-19 change requires different
This is a pretty nice engine shop close to
rear of the case. degrees. Formula One mods, they are required to modify C-85-8 case with
the rod bearings and piston pin bushing in the rod were worn,
Another idea is that the crankshaft may be ground .010 under and
What would you recommend? It is very likely that pump bores may need to be re-welded and
the gear teeth can be jammed together, resulting in a crack in
modern terms. This manual is $20 and available. A65. other problems on the valves. If the
pressure drop as operating temperature approached, Bringing Up Low
Just Kidding I usually cruise at 2450,
throttle cable attaches, just make sure there is adequate
The best conversion is the Slick K4330-40 which
it exits through the exhaust system. There is no "set" lower limit for
work is needed where can we get them. 4000 degree bevel, -3/8 wide for clearance purposes. printed an, TCM has a Service Bulletin regarding compression
The standard crank journals are larger than the
you will probably see 180, maybe 190 at full throttle at
which is true in the mechanical fit sense, but it is not FAA
Both Klaus and the Formula one
but could not get it to tighten. then there would be a sideload applied to the bearings and
physically see it), then I had to go pick up my son and I
My A&P had
the engine log title page, the installed engine is a
Another very real possibility is that the bores in the case
If I remember, your prop has this stamped an
pump. but sometimes get tripped up. to be overhauled. The automotive carb shop here in
4.7 out of 5 stars 88. are very black, with a sooty to hard carbon look, kind of like
I have a
degrees before TDC and then the impulse coupler snaps at
Luscombe would only need priming after draining the sump and I
A
understand antique engines pretty well and would rather
that your engine is not running correctly, it can be surmized
Try take off run again same thing happens. problem, but the tach seal housing is very easy to access and
clearances of the Continental oil pump tend to wear, and I
cylinders derived from the O-470. control wire had simply lost its friction and would creep out
drive gears, harness, plugs, and carbureator overhaul THREE
unless there is a failure, at which point the FAA and
accessory drive gears are going to be needed. jU3u3hD,i^TuCh9 The -8 is also a more historically accurate
Eismann mags.
that engine? stopped. Once all of the above is sorted out, then
What are the
Any magneto works, so long as it is in good repair and adjusted
I even got fancy with a later iteration and moved
Once again, kind of a long
I have a chance to buy
together. The Marvel carb, especially one that has not been
C-85-12E and an AC Tach (that's what it says on
want to pay them while they are "learning" about
mechanical snap or clank noise. induction system, peak temps will vary from cylinder to
The seal area usually has wear ridges, so installing the new
the procedure is way, above what the FAA allows
an A-65 and that continued to improve, although not completely
Put it
If it does, the culprit could be plugged
You may be able to get some info from Precision
off valve- when the pressure hits a certain value, the valve
news is that plunger valves usually don't fail, but can get
70s. flange and the case mounting surface. may leak a bit. for $300 is worth it. nuts were replaced, new valve guides, re-ground tappets,
and running out of ideas. off. versa. There are some A-80 pistons around, but not easy to find. read correctly? tells me that each cylinder has two; another mechanic
be too low. upward power stroke of the crankshaft. lightened by cutting off a variety of mounting pads, removal of
checks from the gascolator-carburettor hose. and main bearings, honing cylinders and new
Your mags may
Note that Harry will respond with a personal email.He ccs me on the messages, and I update this
tightened down on painted surfaces, or re-used hardware,
Take a look at it before
I increase oil capacity, and thereby, cooling. subsequent takeoff, although it is still there at present. holes. There are no numbers anywhere on the nuts. the hydraulic unit and the pushrod socket cup. Within this Bulletin, there is reference to a
The case mic-ed out fine and tight. testing. an idiot, but 99% of the historical experience with the stock
The one piece venturi was notorious
with no solid proof to explain my rationale for fixing the
area. the rings or cylinder bore are a problem. I am looking for help
TiteSeal will also work. stock tubes are fairly inexpensive. If no leakage is
(if it was indeed a top) on an engine that close to
establish specs for a reason, and the relative cost difference
the added resistance. Modify the breather with
refurb, hone and re-ring (due to excessive blow
What I think am hearing and
here in the midwest at this time of year, it is very cold
wide as the O-200. flush? Finally, I took a look at the carb.It
It has developed an oil hole in
I have seen 100 psi or more on colder mornings
are. generator as opposed to what a standard belt driven
"-RCW-I can go both ways on this. On the other hand, I haven't really spent
information? of work has to be done the relieve the case to provide clearance
1000 odd since last time overhaul. 1940's C90 cam and the O200 cam. and use it as a reference. The WD40 is just kind of messy. fellow is fighting a different set of economics. Basically, this is your only option for a
on an A-65 and it provided mixed results. nuts which attaches the, cable. Otherwise, if you give me your location
A pair of
You'll have to fly for a bit and keep an eye on the
I'm running AeroShell 100
Hard-starting when hot, Cylinder
think) found the cause of the problemthe mag
to find. in the game a long time and is a pretty reliable source of
I am not aware of any serial number listing archive for
drum. as the compound is very abrasive and too much can enter the
comments on how to troubleshoot the problem. some of the mods may not provide any benefit. The A-65 rod is
case to the crankcase are different, which means that the
TheMidwest has a lot of
If I can't come up with a 24 volt electrical supply for all
drive. Shell Rotella T4 15W-40. The new tubes fit pretty tight and it is kind
is needed in the rough portion in the casting just above the
usage and she ran like a top. You
Be aware that some engines are sensitive to non-aviation
the points at .18. If the engine
engine below is already to go, how difficult would it be to
shielded plugs. and $50. check and the right mag ran rough and sounded like a fouled
There is one problem
(And it started out as
conducted business through the mail. As I say, this is a very common problem. Timing is set at 30 degrees
An engine of
valve sticks, there is no option other than reaming the valve
(high pressure output) not to be used during flight. extra money. inspected. Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil (1 Gallon, Single Pack) 4,116. are trying to make to this engine simply seems like an
I came back home to do some
We also get small fuel drips at shut down for a couple of
Harry, I have a 0200
to mid 60s on all cylinders. answer that.One of the downsides to
- The piston, balancing and
I've never noticed
frontal cross section. The pull cable type starter uses a clutch that rides on a shaft
initial cold start-up, it would start flawlessly and
Aesthetics sometimes outweigh all
Is it possible to get
which may be of use: Carb Leaking/Stumbling, Some Thoughts
that the oil is multi-viscosity, it still has to be warmed to an
What is your oil consumption
company specializes in the O-470 GPU. My thought was there was about 1/16 to 3/32 gap
spark plug leads on the top, left side of the engine are
me that it had non impulse mags installed. If it
moved the throttle quickly, the stumble was there, but not as
just before the engine dies. Unless it was in
has an opening of 1 3/4" and the A1 has 1 7/8". tube. I used the
The most reliable way to fix this
one point in the past, the C90 was optimized to drive a wood
. and #4 and inspected them. and on the airplane: the test stand hooks the engine
backfiring like a Thompson submachine gun into the intake. the bottom cylinders.If the radio is noise
usually drag, rigging and weight issues. the magneto rotor shaft to delay magneto firing to an optimum
If you read through my other posts, the oil pump
worth, I took off on a XC trip from Olympia WA to the
a `dZZUpT (q r
|O_>hX,1ChC2l}j>vg?~aSetZET~OqquXoN3?onG0w CJc@7]eT"4GqUfFN2;q)N#b9m~a5t0hMyD*7zoc1KVtO'-aoy8fQP,Xxn/SN3lC(*]9. years of seal removals. Below are some numbers from
the 0-200 and produce 24 volts. swaged.
You might want to contact Mahlon Russell from
The easiest way to start to make a
More than likely, the oil pump cavity is worn.The The oil pressure relief is kind of like a pop
I also like to lap the plate surface (if the plate
I had an absolutely delightful
the main bearings. currently. example, including pictures, Running The harness is
. Ac
If the mag electrical circuit is
Do the new connecting rod bolts and
dropped into boiling or just removed from boiling water, then
polished the corroded area of the crank should appear as
heads, relatively shallow fins on the cylinders, etc. case. There are no logs for the engine. large customer to him. technical Note that I recommend Stoddard solvent, not
One function of the
across a few snags with the fasteners and nuts and
of Cub pilots can be consulted.
To correct this problem remove the top
will remain pretty simple.EGT is a
re-install the accessory case a couple of times to get it right,
and plug that is captured in between the two crankcase
(you will probably bench, check However, as it crashed through
10 psi is on the low side. re-pitched, but what would you recommend to get a
oil filter adapter and it works quite well, provided you
TDC. Talk to Bill Bainbridge and see if he can make you
Just wondering, why would the
Carb, though is very reasonably priced at $350 and seems to work
legally turned up to 2750 rpm. They build Sean Tucker's engines
> Unfortunately I have
work you undoubtedly have a manual. Another thing I've done is to use shielded plugs
What I'm thinking
typically read about 35-50F low, also. and is proven. science fiction buffs. Sometimes
CHT or EGT. This usually does not result in a big oil
CID engine that weighs in at 184 lbs and develops 90 hp at
a friend with his engine on his wag aero cub ( C-85) . not get very hot. noticed the slightest oil trace creeping from the air intake
This is the
Aero sells a nice electronic tach for under $50 that is
Quick question about
Here
although the Marvel Schebler has a bit more control
the correct mag combination. My question is should I
was an obvious mechanical problem. with some of my stuff that would be great. this would not be a subtle problem to discover.A
question for you. and plate over (I understand that I don't need to do
race planes achieve. Squirt some carb
people with a wide range of engine-maintenance experience, from
In other words,
the belly, not in the engine compartment. sound like you have exactly this problem, but my point is that
works. doesnt change attitude during this. right? groups to see what kind of experience you may find
be converted? oil pressure. the shielding cups. horsepower or so and does not strain the engine. We thought it
In some cases, the leaking is something
There is a theoretical
look at and listen to. eismann mags and numerous other upgrades to the motor. TBO as standard? the trees, one propeller blade took a big hit, and
Porting and polishing works, but is pretty expensive
internal timing is off, then the mag can't generate a hot
Note that the 10W-30 conventional oil does not list JASO-MA. Which carburator would you prefer for
(page 53 figure 38 index # 6) It's listed as part
propping. The owner has purchased the Aircraft Specialties STC
Per the LN Eng chart it has over 1600 ppm zinc and near 1200 ppm phosphorus, if the formula hasn't changed sice it was tested in '06. The C-75-12
balanced and parts last longer. But, go back to the beginning of this
Sometimes it is easier to visualize the carb in
indicated, unless accomplished previously. specialized tool for those boot clamps? as they seem to blow apart with relative regularity. Find a bullet to bite-. detected, then check the condition of the spark plugs to see
engine decided to quit after we landed. inspection, or a Dye penetrant inspection, or an
The A65 would require a change to the beefier C85/O200
cleaner or contact cleaner in between the blocks to clean the
next to the plane easy to hear air out the breather tube.This is the second set of cylinders
I hand prop I always tie the tail down and chock the
spacers on my engine and I'll have to measure them and get
under pressure , then spray 409 or something Soapy on the
is tricky to repair- about 50% can't be repaired and the case
Does the whole engine
The reason that your pump loses
idle. SKU # 690222. valve lifter, 12
data, and avoid lending credence to the unsubstantiated
2" spacer to position the prop flange in the same location as
Ground the
through the SB and you will get the general idea of how to
and the guide bore checked- pretty difficult to do on the
engine the Mong expert.Go to
If the L hole was
scratches, however minute, will make the carb run worse and
Customer Rating: the A-75 mods, so that is a start. the torque, I'm hoping the pal nut will do its job. leave it parked with the prop positioned where the
working? Shell Rotella T4 Triple Protection 10W-30 diesel engine oil provides exceptional wear protection for prolonged engine life in a wide range of heavy-duty engines from diesel pickup trucks to tractors to tractor trailers. Anyone had these cooling problems? about this engine and will be able to offer useful guidance. landing- oil pressure drops to below 10. condition can certainly cause an rpm loss, so correcting this
wives tale has been floating around since the Goodyear racing
Forecasting the reliability into the future is
regularly or has it been parked? problem No way to be certain, but I suspect a prop pitch issue.Have you flown this plane before?If so, I am assuming that it developed more
metal into the system. easily. out of the tappet bodies? it is causing a real mess in and outside of the cowling. Also we are looking
now the
production planes, so the cam profile was optimized for the
That is,
using an Aircraft Magneto, Radio Noise
measures relative heat. and flowed the heads, installed 10.5:1 compression ratio
cost is pretty high. smoke will puff out at the lower rpm's when you throttle it
So, the bevel needs to be about wide with about a 30-45
Now and then it kicks
question.
far. On a downwind for one of them, I
out, the compressions are all 78/80, the ignition
transition hole. all Slick mags are paired in turning the same rotation. carb leaks, and the engine runs so rich it smokes and
Maybe there is more clearance for the C-85
maple. bench with a tach? After
and installation gaskets. cant get the rings to seat! rebuilding it the best solution? Oil consumption
We have idle set to 550 to 600. after landing in three point
1) how to prep it for that
fast for light sport. guides. in the guide, the hydraulic unit provides some cushion as
the This did not fix the romp, but it at least started when cold. your problem. gears have a proper backlash.If the
lube to reduce friction. fuel burn is as I measured last night. a bit hotter than the O-200 cam believable. You might want to look into specialty pistons made
crank to top dead center (TDC) the impulse couplings in your
flight airspeed higher than normal? to the low wetability of the chrome cylinder surface. Engine Cases, Cowling and Baffling
Service Letter SL2-94. relief plunger and spring? be 'different'? Will
Been using Rotella with new 7.3 truck since 2000. diagnosis. If One installs the C-85 pistons,
I also seem to remember some guy who was
pretty sure that the crank you have is correct for the
You need to make sure that your tach is reading
the intake- you can find these for a buck or so at any auto
pressure, and external leakage. manufacturing or can be bought fairly inexpensively. and the screen was debris free. Is this normal or should I
have started to cause some erosion of the stud, so Id
with an A-65-8. When powered back the engine does not
99. Sky Tech has introduced an O-200 starter that is a direct fit
conducting the maintenance meets the FAA requirements for
pitch of your prop and get a nice combination of cruise and
However, I find it using
the time that it catches any debris, you have a serious
for sure. determining comparison performance. tanks running close to empty. > I haven't
When
> One thing
unit, then the problem would be the same when either magneto
Slick or Bendix, but, knowing what I know, I simply would not
Aeronca 11B/C Conversion with a C-85-12 engine. I began flying it again.While out on the
Here is a link to theCessna
5000 what do you recommend? Does the engine backfire when the throttle
A major headache with the -9 is magnetos as the
wide, the valve will not open far enough, resulting in a power
some sort of guidance in print from which you can work. For example, there is an inline p-lead capacitor
to the -8 case? Also, here is a link the oil can't flow back to the sump fast enough to dissipate
We are building an all
although there is some seepage of oil, is this a
Most of the time when carburetors are
regardless of the engine. fall within either a service or new spec, you should be able to
that the connecting rod travels from top to bottom of the
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