got a new webra .55 me and don and justin worked on breaking the engine in for a few hours. changed glow plugs, a-3 and an 8 won't stay running :angry: any ideas :blink:

Is it too hard to turn over?
Is it too easy to turn over?
Is the glow plug working outside the engine?
Too much glow will make the plug bad fast! Keep that in mind. It can make one run intermittently. (Thats one I learned on my last engine break in) :thumbup:
If the engine has a good compression and the plug is good, then it's fuel.
Try a few dops directly in the carb while turning it over to make sure its getting there and it doesn't get too much.
Then if it doesn't fire off you've got bad fuel! :no:
Hope this helps! ;)

We did everything but adjust the low end on that motor...

Might try that to see if it helps................

I know we all claim to know everything, and I hate to ask, but, I MUST...
Did you do the breakin according to the Webra instructions that came with the .55 engine? :huh:

Sounds like the low end is out of adjustment. :thumbup:

What instructions?? :o We don't need no stinking instructions :wacko:

THere you go! 'Nuff said...
If one doesn't need instructions, then why would one ask for help? :o

I just thought I'd offer that advice because Webras are a bit finicky. But when they are set up, they do their stuff!... :thumbup:

But then what do I know. I only have five Webra .32s and three Webra .50s.
Well, come to think of it, Robert has one of my .32s and Tony has one of my .50s... <_<

Perhaps the .55 is a bit different? :huh:

You will need to shave the head, stuff the crankcase, polish the balls, do the counter balance web mod, run a hot plug, and run five percent or less fuel. :biggrin:

Or, I will trade an OS .32 heli engine for it. :roflmao:

i agree with tony and i agree with don, and i agree with frits. but if i have todo what alvin suggest, i have a webra .55 for sale ;) but all jokes aside, maybe the low end needs leaning up a bit :thumbup: and also, robert s. says his runs better on an #8 glow plug than a #3, and mine seems just the opposit :blink:

tell'em don :thumbup:

OK Frits, with all those Webras, you are just the guy we are looking for :banana:

yea,frits is the ace boon coon, or that's what they told me at hobby town when i bought my trainer :yickes: they said, go to the fly field and ask for frits! he's the best! he'll teach every thing about airplanes there is to know :blink: i'm just joking :D frits is the best teacher anybody could ask for :thumbup:

If it won't stay running with the throttle opened then it probably isn't it but I guess it wouldn't hurt to try. :yes:
Most adjustments, high or low, are close at 1 and a 1/4 turns out from all the way in with the needle not too tight. If the needle got screwed in too tight at any time then it wouldn't run right either because the soft seat will be gouged causing fuel to not flow properly. :thumbup:
I hope a Webra isn't too finiky. :no:
Hope you didn't Fritz the engine! :spin:

hey johnny, this thing runs fine sometimes. it even flew twice, no problem. but the next time i try to run it, it goes dead :angry: it don't run the same way twice :wacko:

Sounds like it just might be a fuel delivery problem.

Something not consistant about fuel flow to carb.

I would check all the fuel lines and the ones inside tank.
Also make sure fuel clunk line in tank not too long. Keep clunk about half inch from back of tank.

Hope you are running a fuel filter, if not, some trash could have found way to needle valve assembly.
Even if running a filter, back flush it and take the main needle out and flush out needle assembly.
Always fuel on the tank side of filter.

Check that engine head bolts are tight and the bottom crankcase cover bolts tight also.
Make sure the carb is pushed all way down in crankcase and properly secured.

alvin, you might have hit the nail on the head :thumbup: it acts like it is afuel problem. i don't know if it's a tank problem,but i'll check it. what i was wandering, was the fuel filter is laying directley on the engine, and i'm wondering if it's foaming the fuel :blink:

Another thing just thought of.

If you have not, balance the prop.
If the spinner is plastic type, try running it without spinner. Those junkie plastic spinners just about impossible to balance and make run true. If it is a good metal spinner, they can be balanced.

If the fuel is foaming at times due to high freq vibes, air picked up by clunk and going to engine could make it run too lean or quit.

I have NEVER claimed to know anything about engines... I leave that to the "experts"... And they can make it sound as if they are experts, cann't they? :lol:

So, did you read the instructions? :rolleyes:

I'd say, as the experts have already suggested, check things external to the engine...
Of course by now you have screwed with all the screws, got everything out of whack, and don't know where you are... :wacko:

Here is my solution

;) You thought that they were confused before!!!!!!

:yickes: :blink: :wacko: :sick:

check nipple on exhoust seen 4 or 5 clogged this year. just an idea.

Good thinking, :thumbup: I have had to drill out two of them. I forgot about that being the proublem.. :wacko:

Billy has a point. Just add the ducted fan unit and call it done. Or better yet just get a mini turbine. That should give you all the speed that you like. :penguin: :yickes: :thumbup: :banana: