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Submitted by: Matt

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Hello Hadi, It is common for an engine to start and run backwards. This happens more often when starting by hand or chicken stick. Are you using an electric starter? If not, I highly recommend purchasing one. If this is happening even with an electric starter, it may be because the engine is flooded with fuel. In other words, it was primed too much. If this is the case, just close the throttle or remove the fuel line and let the engine burn all the fuel out of the engine while running backwards, then try to start it again. It sounds like your high end needle may be set too lean. Once you give it full throttle try the <a href="http://www.hooked-on-rc-airplanes.com/nitro-engine-tuning-tips.html#1">pinch test</a>. If the engine dies right away, it's too lean and you need to open the high speed a bit. If the RPM's rise briefly before the engine quits, then it's too rich and you need to close the high speed need a bit. Good luck, let us know how it turns out. Matt

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Submitted by: Hadi

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Hi, Thanx for your reply. I have a problem with Pinch test. When i advance the throttle to full, the engine die and i do not have any time for pinch test. Also at the idle time, it is not working good! It has a vibration and i think i should solve this problem first. I'm using an electric starter. Thanx, Hadi

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Submitted by: Anonymous

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Your first post said the engine would run a little while at full throttle before quitting. Now it's quitting right away when you advanced the throttle? Is this a new engine or used? Is the engine vibrating badly at idle, or is the engine just running really rough? Like coughing and sputtering? I would suggest putting both the high speed and low speed needles back to the factory settings. The manual should tell you how. I would also install a new glow plug. If you still can't get her lined out, see if there is a local club in the area. Those guys would be glad to check it out for you. Good luck! Al

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Submitted by: Anonymous

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I'm having the same problem with my evolution trainer power system. The engine die when I advance the throttle. I tried to adjust both needle and restart many times, but same result. When I advance the throttle, it seems like there aren't enough fuel going into the engine. I cannot even get the engine to full throttle. Even at half throttle the engine slowly die and stall. It is also hot. This is a new engine.

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Submitted by: Anonymous

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I tried to use a syring and pump fuel into the engine while its running. I advance the throttle and press the syring even harder. Then I advance to full throttle, and I can see fuel coming out of the muffler. but I stop pressing and the engine immediately die. I figure not enough fuel into the engine is my problem. And try to adjust the high and low speed needle, but no result. fuel is still not going into the engine enough for full throttle. so it dies. I need help with the fuel.

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Submitted by: Haidar

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Hi everybody, When you increase the throttle and before your engine going to die, clog the exhaust instantaneously and see whether the engine dies (repeat this process as many times as needed to prevent engine turns off). If when you clog the exhaust engine speed temporarily goes up, there is problem with you fuel pressure line, or even the height of your fuel tank needs adjustment. (I presume that you have followed the manufacturers valve setting recommendations).

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Submitted by: Rico97

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I have got nearly the same issue. I am running an ABC sc46 on a trainer aircraft but I struggle with the full power. Idle is very stable, it reaches full power very well (good transition) but it cannot remain at full power for more than 2 or 3 seconds. I checked my fuel tank (for fuel line, air pressure), I used 4 different plugs (F5 to F8), I also used different fuel (5% and 16%) and sadly still the same issue. I tried the pinch test but was ok. Also I see some fuel going out the exhaust. It is like if there is not enough fuel supplying into the engine but now I don't know whatelse I could do.... SNif Please does someone can help me (I spent months on this issue)?? Thanks in advance.

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Submitted by: Dave

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Get rid of the EVO, its cheap for a reason. As the saying goes, "you get what you pay for"! By an OS 55AX. Will fit anywhere the EVO46 fits. The OS 55AX will give you trouble free flying and give your airplane a whole new dimension. I've had lots of EVO Engines. .46 .52 .61 and the 100. They are the dead stick kings of engines. They are finicky and unreliable due to loading up. The .52 Im still running is the only decent one of the bunch, but Im still leary of it because of the other EVO's. As far as 2 strokes go. If you want reliability, OS is it. Quality is a bit pricier but reliability is cheaper in the long run.

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