The most common Kawasaki Mule Pro MX problems are hard starting after the first 80 or so hours, fouled spark plugs from short trips, a fuel leak and fire risk on some 2019 models (recalled), belt wear, overheating from mud, and minor body and accessory issues. Owners generally rate the Pro MX as reliable, and most problems come down to maintenance.
The Mule Pro MX launched for 2019 as Kawasaki’s mid-size utility side-by-side. It uses a 695cc liquid-cooled, fuel-injected single-cylinder engine with a CVT and natural engine braking, electrically selectable 2WD/4WD with a dual-mode locking rear differential, and electric power steering (EPS). Kawasaki rated it to tow 1,500 lbs and carry up to 700 lbs in the bed.
Kawasaki Mule Pro MX Problems at a Glance
| Problem | Common symptom | Most likely cause | First fix to try | Part you may need |
|---|---|---|---|---|
| Hard starting | Cranks long, hard to start after ~80 hours | Valve clearance, fuel delivery | Have valves checked; inspect fuel filter and pump | Spark plug, fuel filter |
| Fouled spark plugs | Won’t start in winter | Short trips, moisture | Longer run times; replace plug | Spark plug |
| Fuel leak (2019 recall) | Fuel smell, leak | Oil cooler hoses, cracked fuel cap gasket | Confirm recall repair with dealer | Recall repair |
| Belt wear | Slipping, burning smell | Heavy loads, heat, water | Use low range; replace worn belt | Drive belt |
| Overheating | Temp warning | Mud in radiator, low coolant | Clean radiator, check coolant and fan | Coolant |
| Body and accessory issues | Cracked windshield, missing mirrors | Damage, base model trim | Replace parts or add accessories | Windshield, mirrors |
1. Hard Starting
One owner of a 2019 Mule Pro MX EPS found it ran well for about 80 hours, then became hard to start. A new spark plug only helped briefly. Other owners pointed to valve clearance, noting that tight valves make an engine hard to start and that clearance should be checked at the early service, along with the fuel pump, filter and throttle body.
- Replace the spark plug and confirm the battery is strong.
- Check that the first scheduled service, including valve clearance, was done. Tight valves can cause hard starting.
- Have the fuel filter, fuel pump and throttle body checked if it still won’t start easily.
- If your machine is still under warranty, let the dealer diagnose it.
Parts you may need: spark plug, fuel filter.
2. Fouled Spark Plugs From Short Trips
One household used their Pro MX for very short, frequent trips in winter. Moisture fouled the plugs so badly the engine wouldn’t start, and they had to clean or replace plugs about every two weeks. The problem stopped once the machine was driven longer and allowed to warm up fully.
- Let the engine reach full operating temperature at least once each time you use it.
- Keep a spare plug on hand in winter.
- If you only make short trips, plan an occasional longer run.
3. Fuel Leak and Fire Risk (2019 Recall)
In March 2019, Kawasaki recalled about 2,600 2019 Mule Pro MX 700 EPS, EPS LE and Camo EPS models. The oil cooler hoses could separate and the fuel tank cap gasket could crack, letting fuel leak and creating a fire hazard. Kawasaki had received seven reports of fires. Dealers fix it free.
- If you have a 2019 Pro MX, ask a Kawasaki dealer to confirm the recall was completed on your VIN.
- If you smell fuel or see a leak, stop using it until it’s checked.
4. Belt Wear
- Use low range for heavy loads, towing and hills.
- Inspect the belt for glazing, cracks and width; replace if worn.
- Keep water out of the CVT case and dry it after water crossings.
Parts you may need: drive belt.
5. Overheating
- Clean mud, grass and seeds out of the radiator, gently from behind.
- Check the coolant level when cold and top up with 50/50 premixed coolant.
- Confirm the cooling fan switches on as the engine warms up.
Parts you may need: coolant, fan relay.
6. Body and Accessory Issues
Owners mention fairly minor issues: replacing a damaged windshield and rear bumper through the dealer, and base models without mirrors, which some owners add themselves. These are easy to fix but worth checking when buying used.
Useful tools: a battery maintainer keeps the battery healthy between uses, and dielectric grease protects electrical connectors from moisture.
Maintenance That Prevents Most Mule Pro MX Problems
| How often | What to do |
|---|---|
| After muddy work | Wash radiator, check air filter |
| Monthly | Check battery, coolant, oil and tire pressure |
| Early service and per manual | Valve clearance check, oil and filter, spark plug |
| Every season | Inspect belt, brakes and wiring |
| Before storage | Fresh fuel with fuel stabilizer, battery maintainer |
Frequently Asked Questions
Is there a recall on the Kawasaki Mule Pro MX?
Yes. In 2019, Kawasaki recalled about 2,600 2019 Mule Pro MX EPS models because oil cooler hoses could separate and the fuel cap gasket could crack, causing fuel leaks. Ask a dealer to check your VIN.
What engine is in the Mule Pro MX?
A 695cc liquid-cooled, fuel-injected single-cylinder engine with a CVT and engine braking.
How much can the Mule Pro MX tow?
Kawasaki rates it at 1,500 lbs, with up to 700 lbs in the cargo bed.
Is the Kawasaki Mule Pro MX reliable?
Owners generally report few serious problems. Most issues are maintenance-related, such as spark plugs, valve clearance and belt wear.
Conclusion
The Kawasaki Mule Pro MX is a dependable work UTV when it’s maintained. Make sure the 2019 recall was done, keep up with valve checks and spark plugs, let the engine warm up fully, and look after the belt and radiator.
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