Could anyone tell me the difference between engines that have something -------(Threaded) & (SG) ------- sorry for the newbie questions but my engine is in need of rebuild and I am wanting a new engine too.
Could anyone tell me what the standard novarossi (.12) for 1/10 is. Threaded or sg thanks,
James

Pretty much everything is SG now.

threaded is also called an OS shaft. the part of the crankshaft comming out of the engine is only threaded. With a SG there is some thread and on that a 5mm shaft on which you can mount the compleete clutch, with threaded you need an adapter shaft to mount the clutch.

I believe some .12 (side exhaust) Novarossi models can still be bought with a threaded shaft but most engines do come with SG. Do you have a special clutch with an own adapter you can cut off the 5mm shaft making it a threaded shaft.