Problems with OS .46 LA
Bob Knot
I just finished installing a OS .46 LA on an Eagle 2. I followed the
instructions on break-in and did better than that by passing four, eight
ounce tanks thru it.
The problems come with flight. I have it running slightly rich and after
about 4-5 minutes it just dies. Four deadsticks later, I am now on the
ground trying to figure out what is going on. From what I can tell, anywhere
between 1/4 and 3/4 throttle, bubbles form in the line from the carb. to the
remote needle.
I pulled the old tank and installed all new with new line. Same thing. Also,
the darn thing is a bear to prime and start. Everytime you prime, start
flipping the 'ole prop, the fuel in the line starts charging back to the
tank. The tank is slightly lower than the needle, but definately not hanging
from the bottom of the plane.
I was looking for a replacement for a old, tired .40FP. I thought I would go
cheap, since it is only going on a cheap standby trainer. CHEAP is right!!
Guess I'll toss the 'ole FP back on if I can't get it running reliably.
Any ideas?? Anyone know the return policy of HobbyTown on problematic
engines (slightly used, of course)??
Thanks for the help!
Cheers!
Bob
btw: this is with new plug (os and fox), new fuel (cool power and omega
10%n) and all new plumbing.
MAS
Spend the extra 15 bucks and get the tower 46. It is a great strong engine.
I had a 46la on my friends trainer and we never could get it to run right.
The tower engine was a gamble, but right out of the box it is running
strong. Flew it after the first tank of gas, no real break-in req. and it
is
strong. Pulls that trainer around great, plenty of power to spare. I will
be getting one for myself if I ever need another 46 size engine in the 2
stroke arena. Good luck and let me know how it goes.
Mark Similey
"Bob Knot" <Bob...@Home.com> wrote in message
news:A5Z97.79907$dd1.10...@typhoon.neo.rr.com...
Bill McCann
My guess is its not an engine problem per se. Its probably going lean as you
suspect. If the tank is jammed against the airframe, try cushioning it with
foam rubber. Try starting out even a bit richer. I have heard that a drop of
WD40 in the fuel helps cut down bubbles. Putting the old engine in should tell
you something...
Hang...@webtv.net
line has a pin hole in it it will give you fits. I had that problem with
my 40 LA. Also check the four bolts in the back plate. We had several
LA's at our field with the same type of problem and found one or more
bolts in the back plate loose allowing a air leak. I had both problems
with my 40 LA and now it runs fine. I use 15% nitro and a KB-1l glow
plug. Don't run it too lean the LA doesn't like to be lean. Hope this
helps.
Bob @}~`~~,~~
LV RCFlyer
wonderful running and performing....good little bit of extra power for a .40
sized bird.
Sounds like its leaning out. Bubbles means air, vibrations, etc, etc. If
youve check the tank and all the lines, it must be an air leak in the engine,
UNLESS its just a mixture adjustment. Do it die when throttled back? Full
throttle? Half throttle? You need to adjust the low end needle too!
As far as HobbyTown USA (Or any hobby shop for that matter!), since I work for
one, Ive experienced situations like yours more than once with all kinds of
products. Keep in mind....its not OUR fault the engine doesnt work! As a
shop, we shouldnt refund money for a used engine when it was the manufacturers
defect. I know its hard to understand, but you have to take it up with the
company (OS in this case). All HobbyTowns work differently....they may return
it....chances are, they wont. %99 of shops wouldnt. They didnt manufacture
the engine, they just sold what was shipped to them from their distributor.
Good luck!
Jason
Check out my Electric R/C Helicopter Column "Vertical Charge" here:
Paul McIntosh
assembly. Try putting a piece of fuel tubing over the needle valve assembly
in place of the spring clip. Make sure that it covers the joint between the
body and needle. If it still bubbles, then there may be a crack in the body
or the fiber gasket. Many remote needle assemblies seem to have this
problem.
--
Paul McIntosh
Desert Sky Model Aviation
http://fly.mcintoshcentral.com
"Bob Knot" <Bob...@Home.com> wrote in message
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Perry
Is it the blued model engine. If so, I am experienceing the same on my Eagle
2. I had to take the same steps and finally pulled the sucker out. odd we
are both expereincing this problem!
Recall!!!!!?????
"Bob Knot" <Bob...@Home.com> wrote in message
news:A5Z97.79907$dd1.10...@typhoon.neo.rr.com...
Bob Knot
"Perry" <bou...@dmv.com> wrote in message
news:tmjp8gp...@corp.supernews.com...
> Bob:
> Is it the blued model engine. If so, I am experienceing the same on my
Eagle
> 2. I had to take the same steps and finally pulled the sucker out. odd we
> are both expereincing this problem!
> Recall!!!!!?????
It is in fact the blue model. I have narrowed the problem somewhat. I made
an error in mounting the remote needle. I thought I could mount it
vertically, but I guess you can only do that with the .65 LA. Returning it
back to horizontal has cut the bubbles down some. Tank and tubing is all
new, with the same result. I also pulled the needle and lubed the o-ring
with some heavy grease.
My next step is to pull it and inspect the rear cover and seal.
If all else fails, I will mount the .40FP carb. on there. Looks like it
should fit.
Thanks to all who have responded.
Cheers!
Bob
Paul McIntosh
that operates properly?
--
Paul McIntosh
Desert Sky Model Aviation
http://fly.mcintoshcentral.com
"Bob Knot" <Bob...@Home.com> wrote in message
news:ONla7.83289$dd1.10...@typhoon.neo.rr.com...
David Nickell
I have 3 .46LA engines (all blue!) running successfully out of the
box. On one, however, I had to replace the stock remote needle valve
with an .40FP carb due to space limitations. Runs great after the
conversion.
Dave
Michael Morse
>I pulled the old tank and installed all new with new line. Same thing. Also,
>the darn thing is a bear to prime and start. Everytime you prime, start
>flipping the 'ole prop, the fuel in the line starts charging back to the
>tank. The tank is slightly lower than the needle, but definately not hanging
>from the bottom of the plane.
I have this same "problem" with an OS .46FX. I sort of thought that
it was just the way things were, but recently I was helping a friend
with a .40LA, and, to my surprise, once you got the fuel line full of
fuel, it stayed there. As a result, I over-primed the engine until I
realized how different it was from mine.
I put quotes around "problem" because it doesn't bother me and my
engine starts up immediately.
Anyway, it seems to me that the only thing that would effect this
would be tank geometry, not the needle valve or anything to do with
the engine.
--Mike