I´m having trouble starting my engine, it has never been easy to start from the beginning, but it´s getting worse day to day.
I have checked the carburator, cleaned it. It only had a small amount of dirt in the screen inside it, so I got a filtered intake for it hoping it would help, and the problem is still there. The spark plug was changed for a brand new one, the ignition does send a pulse to it.
My starting procedure has changed but here are the two procedures I have tried:
1.- choke on, full throttle, ignition on... flip until it fires and dies again.
then choke off, throttle at idle, ignition on...until it runs

the second procedure is the one that is stated in the instruction manual

2.- choke on, full throttle, ignition on... until gas gets to carb
then choke on, full throttle, ignition off... flip 4 to 5 times
then choke off, full throttle, ignition off....flip 4 to 5 times
then choke off, high idle, ignition on... flip until it starts

I both cases the engine starts for 2 or 3 seconds and then dies. I have to keep fliping and fliping the prop, choking it, un-choking it, and the engine starts and dies. eventually, the engine will start and run normally, but it takes somewhere between 40 and 55 flips to start it.

The tank has been re-lined 3 times, and has been tested for leaks. and everything is good there. the battery is a 6 volt, 2700 mAh Expert brand, and it barely loses mAh or volts. After 5 fights the batt, is till at 6.5 volts and when recharged it gets to max capacity with only about 450 mAh. so there is still a lot of capacity in it after flying.

Is there anything else I should check? Any comments are appreciated.
John

juanes,

I have a ZDZ50NG that was very hard to start also. Try the following:

1. Throttle-wide open, choke-closed, ignition-off. Flip until fuel is drawn into carburetor. Then:

2. With throttle wide-open and choke closed flip five more times. Ignition is still off. Then:

3. Open choke, throttle wide open, ignition off, flip five more times. Then:

4. Turn on ignition, choke open, throttle set about 30% (or a bit more) open...restrain the plane...be safe... flip until it pops or starts. If it just pops and putts a little repeat the above procedure and try again.

After the engine is run very little it becomes much easier to start. Mine required more throttle to start the first few times. It would not start with the throttle at high-idle. My initial concern was flooding it by using the choke too much. That was not a problem. It required more fuel for the first several starts than I though it would.

Mine has a few hours on it now and will start with less throttle. Flying it seems to be the bes way to break it in.

BE VERY CAREFUL when starting with the throttle at 30%. BE CERTAIN to have the airplane well restrained.

Good luck with your engine. rlmcnii

Thanks rlmcnii I will try your procedure, it looks like the second one I used, but with the throttle at 30%. Thanks for your advice.

Sorry I didn´t read the last part of your reply, My engine has almost 4-1/2 gallons on it, just switched to synthetic. It was a problem to start in the beginning but it has gotten even more difficult to start with time. I was thinking maybe the carb was bad, but it is clean and seems to be OK.

As I said, I will try your pocedure and see if the problem goes away.
If not, the I will have to switch the carb, my cousin has a DA50, and I was told to try the DA´s carb to see if the problem went away

Thanks for your Advice.
John

juanes,

Good luck with your engine. I haven't had mine long enough to have had any mechanical troubles with it, carburetor or otherwise.

Mine needed a surprising amount of fuel...lots of choking, to the point that one could easily smell gasoline.... and lots of air i.e., fairly open throttle, to start. It needed more fuel and more air than the instructions seemed to indicate that it would.

My engine has about a gallon through it now and, even when warm, will oftern require the choke, flip; open choke, flip routine to restart.

Interestingly, to me at least, I have never been able to flood the engine. This is true even when re-starting a warm engine. Flooding was my primary concern when first getting the engine to run. Maybe there is something wrong with my engine and I don't know it!!

Let us know how you progress. rlmcnii

rlmcnii:
You know how interesting that is to me?! I have never been able to flood my engine either, even when I start it warm and use lots of choke, it won`t flood!!!!
I`m waiting for an answer fron RCShowcase, I will let you know what they say about it.
Thanks
John