My wife's Bronco (mother's day present) kept throwing belts. I got tired of replacing the A section belts so I found a B94 would work just fine with a little adjustment on the belt keepers attached to the flat idler pulleys. She mowed the yard yesterday which had grown up taller than usual with no belt problems
The adjustment to the belt keepers/guides was easy I just beat them back with a hammer till the cleared the thicker belt.
Now all that is left is to make it mow in reverse.
George
Look underneath on left hand side there is a wire down to a contact this can be unplugged if an adult is using the machine. Watch that the b-section belt doesn't spread the pulleys on the deck and motor they will separate over time as they are thin