The most common Kawasaki Mule 4010 problems are the 2017 fuel gauge recall, rough idle and stalling from bad fuel, cranks-but-won’t-start wiring faults, dirty throttle bodies, CVT belt wear and battery or charging issues. Many owners fix these themselves once they know where to look.
The Mule 4010 is Kawasaki’s full-size work side-by-side, sold in standard 4×4 and Trans4x4 versions (the Trans model folds out from two seats to four). It uses a 617cc V-twin gas engine with a CVT transmission.
Kawasaki Mule 4010 Problems at a Glance
| Problem | Common symptom | Most likely cause | First fix to try | Part you may need |
|---|---|---|---|---|
| 2017 fuel gauge recall | Fuel smell or leak near the gauge | Fuel gauge retainer can collapse | Dealer check for recall 17-751 | Free recall repair |
| Rough idle / stalling | Surging, stalls, poor fuel flow | Water or stale fuel, blocked vent | Drain bad fuel, fresh ethanol-free fuel | Fuel filter |
| Cranks, won’t start | Spark OK, no fuel to cylinders | Broken injector wiring, relay, fuse | Test injector power with a noid light | Harness repair |
| Dirty throttle body | Idle hunting | Carbon buildup | Clean throttle body | Throttle body cleaner |
| CVT belt wear | Slipping, burnt smell | Heavy loads in high range | Use low range, inspect belt | Drive belt |
| Battery / charging | Slow crank | Weak battery, corrosion | Test and clean terminals | Battery |
1. 2017 Fuel Gauge Recall
In June 2017, Kawasaki recalled about 6,600 vehicles, including 2017 Mule 4010 models (4×4, Trans4x4, Camo and SE versions), because the fuel gauge retainer could collapse and leak fuel, which creates a fire hazard (CPSC recall 17-751). The repair is free. If you own a 2017 Mule 4010, ask a Kawasaki dealer to check your VIN.
2. Rough Idle, Surging and Stalling
A 2009 Mule 4010 Trans owner had a rough idle, surging and stalling, and the fuel didn’t smell like clean gas. The cause was water in the fuel, collected around the fuel pump intake. He pumped out about a pint of contaminated fuel, added a water remover and refilled with ethanol-free gas. The engine ran normally after about 30 seconds, and the fix cost about $11.
- Smell and check the fuel; drain it if it’s stale or contains water.
- Check the fuel tank vent and look for kinked fuel lines.
- Listen for the fuel pump when you turn the key on.
- Use fuel stabilizer if the Mule sits for weeks.
Parts you may need: fuel filter, fuel pump (only after testing).
3. Cranks but Won’t Start
A 2016 Mule 4010 cranked normally but wouldn’t start, even though it had good spark and fuel reached the injector line. Resetting the ECU and replacing the injector relay didn’t help. A shop used a noid light and found no power reaching the injectors. The cause was a break in the wiring harness between the ECM and the injectors. Splicing the wire fixed it, and the total cost was about $420.
- Check the fuses and the injector relay first.
- Test for injector power with a noid light or a digital multimeter.
- Inspect the harness for rubbed-through or rodent-chewed wires.
- Protect repaired connectors with dielectric grease.
Parts you may need: injector relay, wiring repair kit.
4. Dirty Throttle Body
Owners in the same idle thread reported success after cleaning the throttle body and checking that the electronic throttle blade moves freely when the key is turned on. Carbon buildup can make the idle hunt even when the fuel is good.
5. CVT Belt Wear
- Use low range when towing, hauling heavy loads or climbing.
- Inspect the belt for glazing and cracks at each service.
- Dry the belt housing after water crossings.
Parts you may need: drive belt.
6. Battery and Charging Problems
Slow cranking is usually a weak battery or corroded terminals. Clean the terminals, test the battery, and keep it on a battery maintainer between uses.
Maintenance That Prevents Most Mule 4010 Problems
| How often | What to do |
|---|---|
| Monthly | Check oil, coolant, battery and tire pressure |
| After dusty work | Clean the air filter |
| Per owner’s manual | Oil and filter, belt inspection, valve clearance, throttle body cleaning |
| Before storage | Fresh fuel with stabilizer, battery maintainer |
Frequently Asked Questions
Is there a recall on the Kawasaki Mule 4010?
Yes. 2017 Mule 4010 models were part of CPSC recall 17-751 (June 2017) for a fuel gauge retainer that can leak fuel. Dealers repair it for free.
Why does my Mule 4010 surge and stall?
The most common causes are water or stale fuel, a blocked tank vent, or a dirty throttle body.
What engine is in the Mule 4010?
It uses a 617cc V-twin gas engine with a CVT.
Is the Mule 4010 reliable?
Yes, it is known as a durable work UTV. Most problems come from fuel, wiring or belt wear.
Conclusion
Check for the 2017 recall first, then look at fuel quality, wiring and the throttle body. These cheap checks fix most Kawasaki Mule 4010 problems.
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