Originally Posted by hustlermidwest
Measure the deck belt idler spring. See if it falls in line with our specs. Keep it's length within our specs and you'll get even longer life.
I've got a method, and if I've never had one seconds problem in thousands of hours except for one stick causing minor damage, I'm assuming it works. Anytime I need to loosen a deck belt to replace a hydraulic belt; when I tension the deck belt I take Vice-Grip pliers and pull the spring to it furthest point my strength will allow and insert that link into it's lock point.
My strength must be pretty well calibrated, the specs call for 9.3" to 10.3" and both my mowers (66" & 72") measure exactly 9.5".