Arctic Cat Zrt 600 Problems

The Arctic Cat Zrt 600, a popular snowmobile from the late 1990s, offered a potent blend of power and handling that made it a favorite for many riders. But like any machine, the Zrt 600 wasn’t without its quirks and potential pitfalls. Understanding these common issues can help you troubleshoot problems, maintain your sled, and keep it running strong for years to come. Let's dive into the common challenges faced by Zrt 600 owners and how to tackle them.

The Heart of the Matter: Engine Troubles

The Zrt 600's 598cc liquid-cooled, three-cylinder two-stroke engine was a powerhouse, but its complexity could sometimes lead to issues. Here's a breakdown of common engine-related problems:

Carburetor Conundrums: The Zrt 600 utilized three carburetors, one for each cylinder. This setup, while providing excellent throttle response, also meant triple the potential for problems.

Dirty Carbs: This is the most frequent cause of poor performance. Over time, fuel varnishes and debris can clog jets and passages, leading to lean running conditions, poor idling, and hesitation. Regular cleaning and inspection are crucial. You'll need to disassemble the carbs, soak the parts in carburetor cleaner, and use compressed air to clear all passages.
Synchronization Issues: If the carburetors aren't properly synchronized, the engine won't run smoothly. This results in uneven cylinder firing, rough idling, and a lack of power. A carburetor synchronizer tool is essential for proper adjustment. You'll need to adjust the throttle cables until all three carburetors open and close simultaneously.
Float Level Problems: Incorrect float levels can cause either flooding or fuel starvation. If the float level is too high, the engine will run rich and may flood. If it's too low, the engine will run lean and may experience surging or stalling. Carefully adjust the float levels according to the manufacturer's specifications.

Ignition System Issues: A reliable ignition system is essential for starting and running the engine.

Faulty CDI Box: The Capacitor Discharge Ignition (CDI) box is responsible for timing the spark. A failing CDI box can cause intermittent spark, hard starting, or complete engine failure. Unfortunately, testing a CDI box can be tricky, and often replacement is the only solution.
Stator Problems: The stator generates the electricity needed to power the ignition system and charge the battery (if equipped). A faulty stator can cause weak spark, battery drain, and starting problems. Using a multimeter to check the stator's output voltage can help diagnose this issue.
Spark Plug Woes: Spark plugs are often overlooked, but they play a vital role. Fouled or worn spark plugs can cause misfires, poor performance, and hard starting. Regularly inspect and replace spark plugs according to the manufacturer's recommendations. Use the correct spark plug type for your engine.

Cooling System Concerns: Overheating can lead to serious engine damage.

Low Coolant: Always check the coolant level before each ride. Low coolant can lead to overheating and engine damage. Use the correct type of coolant recommended by Arctic Cat.
Air Locks: Air bubbles in the cooling system can prevent proper coolant circulation. Bleed the cooling system to remove any trapped air.
Water Pump Failure: The water pump circulates coolant through the engine. A failing water pump can cause overheating. Listen for unusual noises from the water pump and check for coolant leaks.
Clogged Heat Exchangers: The heat exchangers, typically located under the running boards, dissipate heat. Mud, snow, and ice can clog them, reducing their effectiveness. Regularly clean the heat exchangers to ensure proper cooling.

Beyond the Engine: Common Mechanical Issues

The Zrt 600's mechanical components also require attention.

Clutch Complications: The clutches transfer power from the engine to the track.

Worn Bushings and Rollers: Over time, the bushings and rollers in the clutches can wear, leading to sluggish performance and belt slippage. Regularly inspect and replace worn clutch components.
Incorrect Clutch Calibration: The clutches need to be properly calibrated for optimal performance. Incorrect calibration can result in poor acceleration, top-end speed, and fuel economy. Consult the service manual for the correct clutch settings for your riding style and conditions.
Broken Springs: Clutch springs can break, causing a loss of performance and potential damage to other clutch components. Inspect the clutch springs regularly for cracks or breaks.

Suspension Sagging: The suspension provides a comfortable ride and good handling.

Worn Shocks: Over time, the shocks can lose their damping ability, resulting in a bouncy ride and poor handling. Consider rebuilding or replacing the shocks.
Sagging Springs: The springs can sag over time, reducing the suspension's ride height and travel. Replace the springs to restore the suspension's performance.
Broken or Worn Bushings: The bushings in the suspension can wear, causing play and noise. Replace worn bushings to improve handling and reduce noise.

Electrical Gremlins: Electrical problems can be frustrating to diagnose.

Wiring Harness Issues: The wiring harness can become damaged over time due to vibration, abrasion, and exposure to the elements. Inspect the wiring harness for frayed wires, loose connections, and corrosion.
Grounding Problems: Poor grounding can cause a variety of electrical problems. Ensure that all ground connections are clean and tight.
Faulty Switches: Switches can fail over time due to wear and tear. Test the switches with a multimeter to ensure they are functioning properly.

Fuel System Foibles: Beyond the carburetors, other fuel system components can cause problems.

Fuel Pump Failure: The fuel pump delivers fuel to the carburetors. A failing fuel pump can cause fuel starvation and engine stalling. Test the fuel pump's output pressure to ensure it is functioning properly.
Fuel Line Leaks: Fuel lines can crack and leak over time, posing a fire hazard. Inspect the fuel lines regularly for cracks and leaks.
Clogged Fuel Filter: The fuel filter prevents debris from entering the carburetors. A clogged fuel filter can restrict fuel flow and cause performance problems. Replace the fuel filter regularly.

Prevention is Key: Maintaining Your Zrt 600

Regular maintenance is the best way to prevent problems and keep your Zrt 600 running smoothly.

Regularly clean and inspect the carburetors.
Replace spark plugs regularly.
Check and maintain the cooling system.
Inspect and lubricate the clutches.
Maintain the suspension.
Inspect the wiring harness.
Replace the fuel filter regularly.
Store the snowmobile properly during the off-season. Stabilize the fuel, fog the engine, and cover the snowmobile to protect it from the elements.

Frequently Asked Questions

Why is my Zrt 600 hard to start? Hard starting can be caused by a variety of factors, including a weak battery, fouled spark plugs, or a carburetor problem. Check the basics first, like spark and fuel delivery.
My Zrt 600 is running rough. What could be the issue? Rough running is often caused by dirty carburetors, misfires, or a lean fuel mixture. Cleaning the carbs and checking the spark plugs is a good starting point.
Why is my Zrt 600 overheating? Overheating can be caused by low coolant, air locks in the cooling system, or a faulty water pump. Check the coolant level and bleed the system to remove any trapped air.
What's the best way to store my Zrt 600 for the summer? Stabilize the fuel, fog the engine, disconnect the battery, and cover the snowmobile to protect it from the elements. This will help prevent corrosion and fuel degradation.
Where can I find parts for my Zrt 600? Many online retailers and local snowmobile shops carry parts for the Zrt 600. Be sure to check the part numbers to ensure you are ordering the correct parts.

The Long Ride Ahead

The Arctic Cat Zrt 600 is a capable snowmobile, but understanding its potential problems is vital for ownership. By addressing the issues outlined above and diligently performing regular maintenance, you can keep your Zrt 600 running strong and enjoy many more winters on the snow. Remember, a little preventative maintenance goes a long way in keeping your Zrt 600 a reliable winter companion.