why does my rider cut off when i engage the blades
If you are saying that the mower shuts off when you engage the blades (or put the lever for the blades in the up position) then the most common problem is a bad seat safety switch. This is located under the seat. It has two wires going to it.
have u tried looking in the manual
Turn your blades off.
There's a safety switch under the seat. It will shut the tractor off if you get off the machine while the blades are engaged. It's not sensing your weight thinking you have fallen off the tractor.
There is a nice Yellow Knob on the right hand side of steering wheel when you pull it out your PTO(Power Take Off) part that makes blades engage when hooked up right. To shut blades off just push know back in. Hopefully that helps and good luck with the mower. I have had mine 10 years it has never once had an issue.
counterclockwise
More than likely you either have a bearing seized up in one of the deck spindles, a bent blade that is in a bind or debris on the underside of the deck keeping the blades from turning. If this is the first time it has been used in a long time, with the mower off, work the blades back and forth by hand until they move freely then start the mower and try to engage them. If they do not start to move freely then you will have to figure out which one is not turning and take it apart.
To sharpen lawn mower blades, carefully unscrew the blades from the machine. Use a putty knife to scape off any residue. Then take a medium file and stroke the edge of the blade evenly.
He wanted to cut his head off in a sophisticated way...
Normally you will start to hear a loud grumbling sound from underneath the mower when the blades are engaged. With the mower shut off, release the tension from the belt for the blades. Raise the deck so you can grab the blades from the bottom. You should not be able to rock the blades from side to side or up and down. If you can then you probably have a bad spindle. You can do this for wach of the spindles to check them all.
Possibly a bad switch under the seat. This is a safety feature that kills the motor if you overturn the mower. Unless the seat switch is made, the motor will not run with the blades engaged. There is also a switch on the blade engagement mechanism so the mower "knows" when they are engaged.
To sharpen a reel mower, put grinding compound on the blades. This makes the blades into their own sharpening stones. Push the mower around until it is easy (this is called lapping). Wash off the grinding compound. Make the blades so they go the right way again.