Ryobi 410r cultivator needs intital carb adjust ments,where do i start,how vmany turns on idle and high idle?

Zama Carb? Turn both low and high meter screws 2 full turns counterclockwise, and idle speed control to maximum. Prime unit and start motor. Run for about ten seconds and then turn idle jet (clockwise) for maximum rpm and then lower idle rpms - readjust idle meter as necessary along with idle screw. Then gun unit at high speed and turn high screw for maximum rpm. Go from idle to max and make sure there is a smooth transition. If not play a tad with the idle mixture screw till that is achieved.

Have you checked to see if the outer throttle cable is properly seated at both ends?

I have a 410R still looks like new.
it has on it gas & oil = 40. to 1 for mixture.
mine never gets used so it is still new.

Could also be a dirty carb. Spray some carb cleaner in the carb while it's running. If this doesn't work, you might consider dissembling and cleaning the carb. Good luck!

http://www.oscar-wilson.com/MANUALS/BOLENS/21B-121R765.PDF there ya go..

After starting close the choke , push the lever back in
Vitally

They have the parts your looking for at www.lawnmowerpartstore.com

1 1/2 turns open on the adjusting screws. Fine tune it from there. Low speed jet should get the unit to idle and high speed jet should take it to peak speed then be backed off until it starts to diesel

http://tda100.com/Manuals/LawnAndGardenTillers/Ryobi%20410R%202-Cycle%20Yard%20Garden%20Cultivator%20Manual.pdf