Tines run slow/stop even when engine is at full throttle

Question edited for clarity, spelling, sentencing, punctuation and written English including your own name :>D

So you start the engine and it runs, the tines turn, and when you apply throttle and apply it to the soil, it stalls? That means the Carburetor needs setting up, or you have a fuel supply problem.

http://www.jackssmallengines.com/equipment/list/tiller/Tines/254%3aHONDA

If you cant move the tines by hand then I wouldn't think you sheared the pins, more like a gear box problem.

I believe that unit utilizes a centrifical clutch. try decreasing the idle speed and see if the tines stop. They should then engage as throttle is increased.

Is the gear box full of oil? If it is dry it will bog down the engine and stall it. Will the engine run at full speed without the tines engaged? If it doesn't maybe the full throttle mixture screw needs adjusted out CCW a little.

must have burned the clutch, says to break it in slowly over a few uses.

if the idle is too high the tines wont stop due to the tiller tines are run by a "centrifuigual clutch" which means when you increase the throttle speed the tines will start to turn : there are 2 adjustments you can try,1) adjust the idle screw under the carburetor where the throttle adjustment and a triangle piece of metal touch(your throttle cable wire will be attached to this triangle) ,if the triangle and idle adjustment don't touch and there's a gap between these 2 pieces close the gap by adjusting the 10mm adjusting nut,this will correctly set the idle #2) adjust the idle adjustment screw talked about above till the tines dont turn with throttle set at idle or lowest speed setting

The clutch is non adjustable if the clutch fails you will have drive all the time or it slips. if the tines spin at the same speed with the engine at low and high speed the clutch might be slipping, the common cause for this is the gear box is partly siezed due to no grease being pumped into it, most ppl dont even know about this untill its too late. you have to remove the LH side tines to get to the screw.

I took the transmission apart and the gears were fine. The friction pads on the centrifugal clutch don't seem to make full contact with the drum. Does anyone know what the thickness of the friction pads are suppose to be? I used some belt dressing on the pads and got some movement on the tines. With no wear on the gears, I guess I'll be replacing the clutch.

Hi it sounds like you are trying too till the soil with the tiller in the fast position and probably too deep for your first pass. Really the fast position is for transporting the tiller from the field. Try putting the tiller in slow which would be the down position. Turn the throttle all the way foward, engage the tines and push your depth rod on the back down to where it is only going into the soil about four inches or even less depending on the hardnes of the soil. Even though a Troy is the best Tiller made it will try to run away with you when your trying to hog the soil all at once. Your depth setting is very important and people seem to forget the importance of adjusting it. Try these things, and remember to alway's start your tilling in the slow full throttle position. Lowering your depth a little at a time. Till you find the appropriete feed for your speed.