I have a Sears rear tine tiller that the owners manual states to crank, place the wheels in the WHEEL DRIVE positon and the depth regulator lever all the way down to the transport positon but the manual does not decribe how to do either of these. The tiller is Model No. 247-29930 on the manual cover but Model No. 618-04815 on the ID plate, serial no. is 1D049P20197. It's like the tiller is locked in gear, keeping it from cranking. How do I move the DRL and the wheel drive position is the inner set of locks I think?