OS 46 LA/ OS 46 FX- What's the difference?
The difference is night and day.
FX: Ball bearing supported crank shaft instead of power robbing bronze bushings on LA
More power!
Twin needle carb for more precision in engine tuning.
LA: Economy engine
Not very powerful because of bushing and restrictive carb throat and engine porting.
Cheap and atypical quality from OS.
If you wish to get a great running engine but don't want to spend the money for an OS FX but like the LA .46 price then you may want to purchase one of these other brand engines;
Thunder Tiger .46 about 79 bucks new
GMS .47 50-70 bucks new (20 bucks off with tradein on mecoa website)
Tower .46 (same engine as GMS .47, different brand name)
Magnum .46 Great engine