Need a diagram where does the belt that on the deck of my craftman lawnrider model 917272190 25 v twin, the belt that turns the blades

Craftsman puts the belt diagram on the deck top with a decal, check for it. Parts & Accessories | Shop & Find Lawn & Garden, Appliance Parts at Sears Parts Direct | SearsPartsDirect.com from Sears (http://www3.sears.com/) should have a manual if your model number is correct. Basically the belt that turns the blades forms the letter T with the belt running along the outside edges of the letter. The very bottom leg is the drive pulley on the engine. The armpits of the T are the idler pulleys and the ends of the horizontal are the pulleys above the blade. There are small keeper pins that stick down into your way but you can pry around them.

Did you find the diagram?

No I did not. This is a 6 pully system

Did you find the diagram?

No I have not got a diagram