Re: Blades wont engage on riding mower
Your deck has two idler pulleys. One is Fixed and the other is the moveable one which tighten the v-belt.
Measure the current belt. It should be 1/2" x 109". V-belt do wear thinner so they ride deeper the spindle pulleys and the engine pulley. This causes the effective belt length to longer even if the outside belt circumference is the same. Also belts can stretch over time from the deck load.