Mb115

Hi everyone, Not sure if I'm posting on the correct forum. I've change the cambelt all the timing marks were aligned locked in place, rotated the crankshaft 2 revolutions by hand. But they did not end up same in the same position after the 2nd turn. But they aligned on the 3 rotation. At that point I tried to start the engine it turned over but won't fire, sounds like a misfire.