Hello, I am still learning about alot of things RCrelated,, I have a moki 2.10 and sometimes when Istart it it will actually be running backwards,, pushing the air instead of pulling it, It does it sometimes either way if I spin the prop counterclockwise or clockwise,,what causes this , is is something Ihave adjusted wrong?? thanks
Ronnie

Prop may be smallish, thus lacking mass inertia to bring it past top dead center.
Use the backflip method for starting. The prop will bounce back on ignition and run the right direction.
Do not backflip all the way through compression. Just bump it backwards.

OK,, will give that a try,I know the prop I use on this engine is actually on the larger side, from what I am told,, 22x6