OS 46 FX is an incredible engines......if you are having problems with them is is of your own accord or your a rep. for the competition. Run strong...not finicky..start right away. Wonder why OS stopped making them? Oh cause they lasted forever...unlike what will happen to the plastic needle valved replacement.

I also have couple of LA's and they are okay with the exception to the crappy plastic crank covers and plastic needle valve housings......OS planned this well.....