Small Engines (Lawn Mowers, etc.): old craftsman mower deck problems, rake angle, tensioner pulley

Question
i have a craftsman riding mower model#917252531... 15 h.p b%26s engine model#28n707... my deck belt keeps jumping off i can cut like one streak of grass an the belt jumps off

Answer
HI CHRIS


BE SURE THAT THE BELT IS NOT STRETCHED OR DAMAGED IF SO REPLACE IT

MAKE SURE THE BELT GUIDES ARE IN PLACE AND ARE CLOSE TO PULLEYS ETC BUT NOT TOUCHING THEM
BE SURE  BELT  IS ROUETED CORRECTLY ? AND NOTHING HELPING TO FLICK IT OFF
BE SURE  MANDRELL PULLEYS ARE NOT BENT / WOBBLY / DAMAGED ?
MAKE SURE THAT  BELT TENSIONER PULLEY IS NOT DAMAGED OR FROZEN AND IS KEEPING TENSION ON CUTTER BELT WHEN ENGAGED AND IS NOT HELPING IT TO JUMP OFF WHEN DISENGAGING

IS THE DECK FITTED TO TRACTOR CORRECTLY ?

IS THE RAKE ANGLE FROM  FRONT TO BACK TOO STEEP ?

JUST A FEW THINGS TO CHECK


CHEERS  HOPE IT HELPS


PAUL