I have a T-750 which I bought new from Tiano. It is a very low time, awesome powerhouse. BUt I have a few problems which some of you may be able to help me iron out. It will not start as reliably as other 750's which I have seen. I am using Powermax as my starter, are others having better luck with butane? Also does it matter at which angle the glow plug is mounted, should it be straight up, or does it matter that I have the engine mounted a 1/4 turn around and the glow plug mounted at about 45 degrees from horizontal? What should my settings be in the startup box for "gas" and "glow plug". I have adjusted these numbers slightly up and down with little or no effect. I have purchased a new ECU battery thinking that maybe the battery strenghth might be playing a part in the start up, but this has not seemed to fix it either. It usually requires up to 5 or 6 attempts to get a light.
I am using the engine in a SM F-15 mounted stock with a Tam pipe.
Any help would be appreciated. I am located at about 135 feet abouve sea level.
Thanks.
Tommy

Hi Tommy,
I just happen to scan across this. Although I am not a rep or anything I might be able to help. Rotation of the can is irrevelant. Check the plug end filament. Take a hobby knife and slowly pull it out 1-2 coils usally 1/8-3/32". Also you can turn the plug temp up. Remember it only glows for a sec or two. Depending on the plug if it is a Rossi 8 you can go up to 65-70. A good plug # to start is 45-50 at 85 degrees. You really dont want to mess with your #'s much when you get it set up. Temp and humidity play a small role on starting usally all you would ever want to do is raise plug temp if it is cold or damp. Powermax is all I use and I have had alot of engines.

On one engine I had, very similar brand it always had trouble lighting off. Once lit it would start the rest of the day problem free. I always said it just needed to warm up.(Cure but not reccomended) BBQ lighter.


Tim

THanks Tim,
I have been told that one solution may be to change out the plug. I will do that, I should have thought of it, but really haven't. I will give it a try this weekend. Thanks for tips.
Tommy

Tommy,

Might be able to help here as well. I would recommend changing the plug out as well. If i were you, i would go to a McCoy MC9 plug and the plug setting in the ECU should be right about 78-81. I have found that it is best to use a standard glow plug ignitor to heat up the plug coil before you try to pull the coil out of a new plug. It makes the coil a little easier to pull out without breaking it. It is very easy to do, just take a T-pin or #11 exacto blade and pull 2 coils out so that they stick out beyond the base of the plug. I have never had a lightoff issue with my T750 using this method. A plug should last you a very long time. The next thing i would do is make sure that you bleed the propane out of your start gas cylinder after each day of flying. Those cylinders are so small (really would be better if they were bigger) and if you get gas in there instead of liquid, it will have trouble completing a start. Should lightoff though, just may hang if you don't have enough liquid powermax in the cylinder. Feel free to give me a call if you are still having problems with it after you have changed the plug and bled the start gas cylinder. Just leave the start gas cylinder open for a while to make sure that all of the gas gets out. I just unplug mine after each day of flying and then plug it back in the next time i go to the field. I will PM you my phone number if you are still having problems. Just send me a PM and let me know. Hope this helps!

Sean

Tommy;
The previous responders offered good advice. My 750, once set up properly starts and runs awesome. Fuel (Throttle lever) response is quicker than any Turbine I have observed operating. Mine as yours is installed in a SM F-15. Couple of points to mention.
The plug values and the Gas (powermax) values are REVERSED readings on the start box. That is to say, if you decrease the numerical value of the plug you are actually INCREASING voltage to the plug. Conversely, increasing the numerical value actually DECREASES voltage to the plug. The prior responders recommendations of value are within operating range for a McCoy 9;my choice. Remember also, increasing numerical value of gas, decreases flow and vice versa. Give John at FTE a call and you will find a wealth of information. . .information which turned me around in quick order and had me back in the air. John is a professional whose information you can trust and he will be there when you need him. Happy EPR's! Cheers, Eric

BlueFox you are correct . The values are as you say. I gave an example of a different ecu version years ago my mistake.

Tim

Tim. . .
No Problem. . .I experienced it before I was corrected by john at FTE. I blew 4 plugs because I was working in reverse of the way the start box is programmed. Let's just hope Tommy gets things sorted out. You know, I have been flying RC for more than 40 years and although I received advice and help through those years, I have ony recently experienced and enjoy emensly those who fly Turbines. Overwhelming opportunities for guidence. SOooo I want to help when I can. Good Luck Tommy, ya gonna have a blast!

Regards,
Eric

Thanks for the help guys. I put in a new glow plug and she fired off with the first puff. You are right about the values being reversed. The lower the value the hotter the plug, and the higher the number the less gas you get. Thanks for the help fellas. I should have known better, but assumed that the glow plug was fine since I was not getting a "blown plug" error. Live and learn.
Tommy