Performance Adjustments
A. Engine RPM Check and Adjustment
Description | High RPM Spec. | Low RPM Spec. |
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31 & 37 Kawasaki | 3600 | 1550 |
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NOTE: RPM Specs. are for free running engines under no load.
1.Verify that the speed control pedals are in the neutral position, the parking brake is on, and the PTO drive is disengaged.
2.Start the mower and let it run at approximately half throttle for
3.Locate the Hour Meter/Tachometer/ Service Minder display on the right hand operator control panel. (See Fig.4 on page 10 of the manual) This display defaults to Tachometer mode when engine is running.
4.Move the throttle lever to the high speed position and note the RPM reading on the display.
5.Move the throttle lever back to the low speed posi- tion and again note the displayed RPM’s.
6.Compare these noted RPM readings to the specifica- tions in Table 1, for the engine that is on your mower.
7.If the readings do not correspond to the ranges in the table, refer to the engine owner’s manual for the proper adjustment procedures.
8.If adjustments per the engine operator’s manual do not result in proper RPM readings, contact your ser- vice technician.
9.Note: The throttle cable sheath may shrink or slip over time, changing the relationship between the throttle lever on the left hand operator control panel and the throttle arm on the engine. To readjust the throttle cable:
a.Make sure the engine is off, and the speed control pedal is in the neutral position. Set the parking brake, and disconnect and ground both of the spark plug wires.
b.Locate and loosen the cable clamp on the engine throttle plate.
c.Place the operator’s throttle lever to the high speed position and then slide the cable through the clamp until the throttle arm is in the full throt- tle position. (Ref. Engine owner’s manual)
d.Tighten the cable clamp.
e.Move the operator’s throttle lever between high and low speed and verify that the engine throttle arm also moves through it’s full range of motion.
f.Repeat as required to obtain proper throttle adjustment.
g.Verify proper throttle adjustment by checking RPM readings as outlined above.
B. Deck Corner Ball Wheel Roller Settings
1.Matching the set heights of the ball rollers on the front and the four corners of the mower deck to the desired cut height will prevent edge scalping and minimize any
2.There are four height adjustment holes in the bracket that mount the ball rollers to the deck.
a.Use the top set of holes for cut heights of 1 to
b.Use the second set of holes for a 2 -
c.Use the 3rd set of holes for 3 -
d.Use the bottom set of holes for cut heights of 4 inches or higher.
C.Deck Center Anti-Scalp Roller Settings
1.The rear rollers help prevent the scalping of high spots and uneven terrain across the center section of the deck.
2.The rollers on the rear of the deck can be adjusted downward one inch.
a.Lowering the roller will increase the striping effect left behind the mower.
b.This positioning of the rear roller will also help to filter the mulched grass clippings into the turf.
c.Roller should not be lowered if the cut height is set at
D.Steering Wheel Adjustment
1.Proper steering wheel and seat adjustment will result in the following:
a.In the neutral position with hands on the steering wheel,
1.Operator’s upper arms should be relaxed and approximately vertical.
2.Operator’s forearms should be approximately horizontal.
3.Operator’s back should stay in contact with the seat back.
4.Steering column should not contact operator’s legs.
2.The steering column can be repositioned forward/ downward or rearward/upward.
3.Set the seat to the preferred operating position.
a.Adjustment lever is located under the front edge of the seat.
b.The seat has over 8 inches of
4.Check the results of any adjustments to the condi- tions described in section a, above. Repeat any adjustment procedures as required until all condi- tions are met.
E.Deck leveling Procedure
1.Park the mower on a flat paved surface, engage the parking brake, shut off the engine, remove the key from the ignition switch, disconnect the spark plug wires and
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