Briggs & Stratton IS3200ZKAV3561 Dealer Setup & Adjustment Instructions Manual page 13

Although it is fastened with a multi-position anchor, this is not
an adjustment point.
Do NOT attempt to adjust the spring length or lifting
performance will be compromised.
Check the Short Right Hand Deck Belt -
61" Decks
NOTICE To avoid damaging belt, do not pry over
pulleys.
1. Lower the mower deck to it's lowest cutting position.
2. Remove the mower deck guards and floor pan to gain
access to the mower deck belts.
3. Make sure that the V-side of the short right hand belt (A,
Figure 28) is in the pulley grooves of the center spindle
pulley (B), the front idler pulley (C), the rear idler pulley
(D) and the right hand spindle pulley (E).
28
4. If the short right hand belt is not properly seated, loosen
the jam nut (F) on the carriage bolt (G) and the 3/8" nut
(H) that secure the rear idler pulley (D) to the deck. This
will allow the rear idler pulley to move in it's adjustment
slot.
WARNING
Use extreme caution when rotating the idler arm due to the
increased tension in the spring as the idler arm is being
rotated. Injury may result if the idler arm is prematurely
released while the spring is under tension.
5. Carefully rotate the idler arm (I) clockwise, which will
relieve the tension on the belt exerted from the idler arm.
6. Re-seat the short right hand belt and carefully release the
tension on the idler arm.
7. Set the mower deck to the 3-1/2" (8,9 cm) cutting
position.
8. Measure the coil-to-coil length (J) of the idler arm spring
(K). The measurement should equal 6-1/8" (15,6 cm) ±
1/8 (0,32 cm). If not, turn the adjustment nut (L) until the
measurement is achieved.
9. Tighten the jam nut and the 3/8" nut that secures the rear
back side idler pulley to the deck.
Check the Short Right Hand Deck Belt -
72" Decks
NOTICE To avoid damaging belt, do not pry over
pulleys.
1. Lower the mower deck to it's lowest cutting position.
2. Remove the mower deck guards and floor pan to gain
access to the mower deck belts.
3. Make sure that the V-side of the short right hand belt (A,
Figure 29) is in the pulley grooves of the center spindle
pulley (B), the front idler pulley (C), the rear idler pulley
(D) and the right hand spindle pulley (E).
29
4. If the short right hand belt is not properly seated, loosen
the jam nut (F) on the carriage bolt (G) and the 3/8" nut
(H) that secure the rear idler pulley (D) to the deck. This
will allow the rear idler pulley to move in it's adjustment
slot.
WARNING
Use extreme caution when rotating the idler arm due to the
increased tension in the spring as the idler arm is being
rotated. Injury may result if the idler arm is prematurely
released while the spring is under tension.
5. Carefully rotate the idler arm (I) clockwise, which will
relieve the tension on the belt exerted from the idler arm.
6. Re-seat the short right hand belt and carefully release the
tension on the idler arm.
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