hey guys so i think i am going to get a plane that has an os 46 fx on it and am wondering how good these engines are? how reliable adn how strong are they also what props do you guys find works well with them? ohh and how would it compare to my evolution 46?


Chris

The O.S. .46 FX is a terrific engine that is powerful, reliable, and easy to tune. The .46 FX was notorious for "peeling liner" problems when first introduced, but if you're buying a good running example of the model, you have little to worry about.

I have one .46 FX and one .46 FXi engine in my collection, and both have proven to be very reliable and very user friendly over the years.

If you are using a hotter plug than the OS 8 in your Evolution .46NT, then it will have more power than the .46FX. You can see the difference by using an A3 plug and retuning your Evo.

Both engines gain a significant bit of power with the Tower's muffler.

If that .46FX is in good shape, it may be a good idea to use some castor in the fuel to prevent further wearing of the liner and piston.

The .46FX is one of the best engines OS ever made. Strong, reliable, versatile for anything from a sport plane to a Q-500 or 3D profile. Tell us what plane you're going to hang it on and we might be able to help you out with prop selection too.

Sport- 11x6,11x7
Speed- APC 9x7
3D- APC 12x4 or 12.25x3.75

hey the engine is on a kadet lt 40, also i was looking at the manual and am i reading it correct that there is no idle mix adjustment? on my evolution there is or am i just missing it on this one?

There is an idle mixture adjustment. It is the slotted screw inside the throttle arm axis.

ahhhhh i seee it thank you

I always liked the 11 1/2" x 4 APC sport prop on that motor.

Don't be afraid to turn a few RPMS with this motor.

I only ever had a 46fx on a 3d plane and a 12x4 apc was the best prop I tried. I never did try an 11.5x4, which would probably be even better since, like Daven said above, the FX engines like to spin up.

MIke