Turn your blades off.
I do not have any schematics for the Kgro Power Prow riding mower. The blades have stopped engaging. Joe M
check to be sure the blades have free movement. usually if you have this problem it is caused from something stopping the blades from rotating therefore it stops the engine
Several things it could be. Check the key in the flywheel, that would change the timing, I think your engine may have internal problems. Also check the blades where they bolt to the spindles may have broke something there. I am assuming this is a riding tractor with belt driven deck.
It sounds like your enigne needs a tune up. An engine that is not running as strong as it should will have little effect while running without the blades engaged. Once you engge the blades and put that extra strain on the engine it will show that there is something wrong. You can start with just a new set of spark plugs. You might get by with just replacing them. If not, you may have to have a mechanic look at it for carburetor cleaning, carb adjusting, coil cleaning or replacement...
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.
Check the belt and if it isn't that, it could be the PTO. That's under the engine with two wires coming out of it. It will be in route with your blade belt
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2 21inch blades.
how do you change the blade from a troy bilt riding mower
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.
If the engine is running properly and the blades are not working there are a couple things that could be causing it. 1) The cable or linkage that operates the pulley to engage the blades is broken or bent. 2) One of the pulleys are bad. 3) The belt is broken. #3 would be the most common problem.
Most lawn tractors don't have any fancy clutch system, but simply use the belt to engage and disengage the blades. When the blades are disengaged, the drive belt is slack and there isn't enough friction to the pullel to drive the blades. When engaged, the belt is taught and the belt drives the blades. Tension is controlled by a spring loaded pulley. When you pull the lever to disengage the blades, you pull this pulley away from the belt. When you engage the blade, the spring pushed the pulley into the belt, tensioning it.