ok, I have a old helicopter that i just rebuilt but kept same engine (O.S 61 2 stroke). The engine in there right now i have never attempted to start until yesterday when i found out that the starter cone on the top of the engine where you would put a hex shaft into to start it is solid( no hole for shaft). So i tried my torque starter 90 and the starter cone doesnt grasp the cone on the engine and it wont turn it over at all when it is "TDC", but i can turn it over fairly easy with my hand, and i dont know if the engine is fairly new with lots of compression or if it is old. So my question to you all is how do i start this thing?

Mike

Is it a cone start or does it just look like a rod sticking up? If its just a rod then you probably need something like the TNT starter shaft but make sure before you go buy something. I'd just find out the start shaft OD, find a 6mm hex start coupler thats compatible, and convert it to hex start.

Do you have a picture or info on what kind of heli we are talking about here?

those old black head OS .61s where ard to start, I used to loosen the glow plug and put the glow starter on it, start it and then screw the plug back in.....

That was before they had dynatrons..................and cars

yeah it has alot of compression, but the top of the shaft where you would put something on it to start looks like a smaller aluminum version of a spinner off of a airplane. It has a hole in the top of it but nothing like a hex or something in it. And i cant get the spinner of the shaft its self because when i got it the small allen is stripped out. does anyone know how i can get that out?
Mike