Exmark Radius S Series - User Manual

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RADIUS

®

ForSerialNos.

408,644,346&Higher

PartNo.4505-549Rev.A

Table of Contents

Questions and Answers

E
eparsonsAug 17, 2025
What to do if Exmark Lawn Mower starter does not crank?
- H
  Heather DiazAug 17, 2025
  If the starter on your Exmark Lawn Mower doesn't crank, it could be due to several reasons: * The PTO might be engaged. * The parking brake might not be engaged. * The drive levers might not be in the neutral lock position. * The battery might not have a full charge. * Electrical connections could be corroded, loose, or faulty. * A fuse might be blown. * A relay or switch could be defective. * There might be a faulty module. To resolve this, disengage the PTO, set the parking brake, ensure the drive levers are in the neutral lock position, charge the battery, check and clean the electrical connections, and replace any blown fuses. For issues with the relay, switch, or module, contact an Authorized Service Dealer.
J
jacobsonamberAug 21, 2025
What to do if my Exmark Radius S Lawn Mower is losing power?
- J
  Jerry TrevinoAug 21, 2025
  If your Exmark Lawn Mower is losing power, it could be due to several reasons: The engine load might be excessive, the air cleaner could be dirty, or the oil level in the crankcase might be low. Additionally, check for plugged cooling fins and air passages, a dirty fuel filter, or dirt, water, or stale fuel in the fuel system. To address this, reduce the ground speed, clean or replace the air cleaner element, add oil to the crankcase, remove obstructions from the cooling fins and air passages, and replace the fuel filter. For issues with the fuel system, contact an Authorized Service Dealer.
A
Amanda GeorgeAug 25, 2025
Why does my Exmark Radius S vibrate abnormally?
- R
  Ralph WilliamsAug 26, 2025
  Abnormal vibration in your Exmark Lawn Mower can stem from several causes: bent or unbalanced cutting blades, a loose blade mounting bolt, loose engine mounting bolts, loose engine pulley, idler pulley, or blade pulley, a damaged engine pulley, or a bent blade spindle. To address this, install new cutting blades, tighten the blade mounting bolt, tighten the engine mounting bolts and tighten the appropriate pulley. For issues with the engine pulley or blade spindle, contact an Authorized Service Dealer.
J
Jacob WilliamsAug 28, 2025
Why does my Exmark Radius S Lawn Mower pull to the side?
- C
  Connor MorrisAug 28, 2025
  Your Exmark Lawn Mower might pull to the left or right due to incorrect tire pressure in the drive tires. Adjust the tire pressure in the drive tires to correct this issue.
M
Michael HarrisonSep 1, 2025
What to do if my Exmark Radius S Lawn Mower blades do not rotate?
- A
  Ashley LewisSep 1, 2025
  If the blades on your Exmark Lawn Mower aren't rotating, it could be due to a worn, loose, or broken drive belt or deck belt, the deck belt being off the pulley, a broken or missing idler spring, or the drive belt not being routed correctly. Check the belt tension, install a new deck belt, install the belt on the clutch and deck pulleys, idlers, and tensioning idler per the routing decal on the deck, and replace the spring. Refer to the belt routing decal on the deck for proper routing.
J
Jason WilliamsSep 5, 2025
What to do if my Exmark Radius S machine does not drive?
- D
  Dr. Randy RichardsSep 5, 2025
  If your Exmark Lawn Mower isn't driving, possible causes include the drive release handle not being in the “operating” position, a worn, loose, or broken drive or pump belt, the drive or pump belt being off a pulley, a broken or missing idler spring, or low or overheated hydraulic fluid. Position the handle in the “operating” position, change the belt, replace the spring, and add hydraulic fluid to the reservoir or allow it to cool down.
J
Jennifer BaileySep 9, 2025
Why is my Exmark Radius S Lawn Mower cutting height uneven?
- A
  Alejandro HillSep 9, 2025
  Uneven cutting height on your Exmark Lawn Mower can be caused by several factors: blades that are not sharp, bent cutting blades, a mower deck that is not level, a dirty mower underside, incorrect tire pressure, a bent blade spindle, or uneven blade tip height. To fix this, sharpen the blades, install new cutting blades, level the mower deck, clean the underside of the mower, adjust tire pressure, and replace blades, spindles and (or) check for damage to mower deck. For issues with the blade spindle, contact an Authorized Service Dealer.
U
uwilliamsNov 12, 2025
Why won't my Exmark Radius S engine start?
- R
  robert36Nov 12, 2025
  The engine might not start due to several reasons. The fuel tank could be empty, the fuel shutoff valve might be closed, or the oil level in the crankcase could be low. Also, check if the throttle and choke are in the correct position. Other potential causes include a dirty fuel filter, dirt, water, or stale fuel in the fuel system, a dirty air cleaner, a malfunctioning seat switch, corroded or loose electrical connections, a defective relay or switch, a faulty spark plug, a disconnected spark plug wire, or a faulty module. To resolve this, fill the fuel tank, open the fuel shutoff valve, add oil to the crankcase, ensure the throttle and choke are correctly positioned, replace the fuel filter, clean or replace the air cleaner element, check the seat switch indicator and replace the seat if...

Exmark Radius S Series Specifications

General

Engine Brand	Kawasaki
Cutting Width	52 inches
Transmission	Hydrostatic
Deck Construction	Fabricated
Deck Material	10-gauge steel
Engine Type	4-cycle
Drive Type	Rear-wheel drive
Speed	8 mph
Spindle Material	Aluminum
Deck Lift System	Foot-operated

Summary

Safety

General Safety

General safety instructions for operating the machine.

Before Operation Safety

Safety precautions before operating the machine.

Slope Safety

Safety precautions for operating on slopes.

Rollover Protection System (ROPS) Safety

Safety information regarding the ROPS.

Specifications

Engine

Fuel System

Safety Interlock System

How the safety interlock system functions.

Operator Controls

Explanation of steering, motion control, and other levers.

Operation

Controls

Overview of machine controls.

Motion Control Levers

Driving the Machine

Transporting the Machine

Loading the Machine

Maintenance

Maintenance Safety

Safety precautions for performing maintenance.

Recommended Maintenance Schedule(s)

Schedule of recommended maintenance tasks.

Engine Maintenance

Checking the Engine Oil

Changing the Engine Oil

Steps to change the engine oil.

Check Battery Charge

Recommended Jump Starting Procedure

Step-by-step guide for jump starting the battery.

Check Mower Blades

Check Safety Interlock System

How to test the safety interlock system.

Check Hydraulic Oil Level

Change Hydraulic System Filter and Fluid

Adjustments

Deck Leveling

Adjusting the Parking Brake

Cleaning

Troubleshooting

Starter does not crank

Engine will not start, starts hard, or fails to keep running

Causes and solutions for engine starting problems.

Engine loses power

Blades do not rotate.

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