Polaris Sportsman 500 Dies When Accelerating Fix 2022

Contents

Polaris Sportsman 500: The Polaris Sportsman 500 quad is a serious choice for trail riding.

It offers lots of power and excellent traction. However, this 4×4 is not for everyone.

Polaris Sportsman 500

It dies when you accelerate. You might have tried everything. You may now be curious as to why your Polaris Sportsman500 stops accelerating.

The CDI box is what causes the Polaris Sportsman 500 to stop accelerating when it needs to.

It is responsible for passing electrical current to the spark plug to ignite the engine. The problem can be fixed by replacing the CDI box with a Polaris CDI. You can also check the other parts of your quad.

Most people assume that the problem is related to the carburetor. This controls the fuel and airflow into a motor. 

Many people have found the root cause to be electrical, specifically the CDI box.

Polaris Sportsman 500

Polaris Sportsman 500 Dies While Accelerating

This is a frustrating problem, especially if it’s not clear why. Continue reading to find out more about the problem and what you can do if it doesn’t work.

What’s inside a CDI Box?

A typical Capacitor Discharge Ignition Box consists of a small transformer and a triggering circuit.

The main capacitor is also included. The charging circuit contains a rectifier that stops the capacitor discharge at the moment of ignition. 

It controls the timing and rev limiters, as well as the safety kill switches and factory safety kill switches. 

The configuration of the CDI box can vary depending on the ATV’s make or model. It may also control other items beyond what was already mentioned.

What are the symptoms of Bad Polaris CDI Box?

If a Polaris Sportsman500 idles and then dies, there are many things that can be blamed, including misfires, rough running, or a stalling engine. These signs will help you identify if the problem is in the CDI box.

  • Bad CDIs won’t fire because everything passes through the box that fires the motor.
  • Spraying water onto ignition leads will reduce their length.
  • Frayed wires and loose spade connectors are usually fixed with some pinching and dielectric grease. If it doesn’t make a difference, consider it a sign.
  • A defective regulator or rectifier can often be blamed for a cooked battery.
  • Carboned plugs can flood the carburetor, pointing towards a faulty CDI Box.
  • Multimeter testing of ignition coils gives results that are not in line with the manufacturer’s specifications.

Causes of restricted acceleration

These are the most common causes of the Polaris Sportsman 500‘s death when it comes to accelerating.

However, they should not be the only things you inspect. Understanding the source of these issues and how to fix them will save you time and money.

1. Stator and Coil Failures

The CDI will stop working if there is a problem with the source coil. The DC conversion kit can be used to replace the stock CDI box, as it bypasses any defective source coil. 

This can be caused by electrical wiring problems or engine compression. It is best to perform tests to identify the cause. The compression test is the most straightforward, followed by a wiring inspection.

Perform an initial compression test of the engine when it is cold. If the engine fails to start again, you can test it again immediately. Compare the results. You might find the problem if the second result is significantly lower than that of the first. 

Check for any wiring harnesses that may come in contact with hot surfaces such as the exhaust. Check that the cylinder head is not melted or chaffed.

2. Carburetor

Owners usually suspect the carb as the primary cause. The symptoms can become so severe that the carb will only run if the choke is turned on/off or a carb cleaner is sprayed down its throat. 

Many people would rush to replace bolts, bushings, and rubber diaphragms as soon as they noticed a problem with their carbs. 

Many forget to give it a new kit for carb cleaning. Your Polaris Sportsman’s throttle response is slowed down because of poor seat alignment and needle alignment.

You must maintain a certain level of vacuum for Polaris 500s equipped with CV carbs to allow the slide to function properly. 

This requires you to cover the slide and change the jets. These carbs are sensitive to changes in the airbox. It may take some time to adjust a new kit or modified airbox.

It is also important to check the valve clearances on ATVs equipped with Keihin carburetors.

They can cause the same symptoms that Sportsman 500s equipped with CV carbs. The small, non-replaceable jet that is embedded in the passageway at the venturi should be checked. 

Spray cleaner through the passageway. Next, disassemble the carb and run a small-diameter wire through it. To complete the thorough cleaning, blow through with compressed air. Repeat this process in both directions.

3. Camshaft & Exhaust Lobe

If you do not schedule oil changes, the exhaust lobe of your cam can wear. Extreme cases may require a rebuild of the exhaust lobe. 

The Polaris 500 has a restricted acceleration of 90% due to the exhaust lobe wear on the camshaft.

You will need to replace your rocker arms if the cam is the problem. This troubleshooting step should only be performed if the CDI and carburetor are checked. 

Professionals are the best to perform this step because they know how to do the timing correctly.

Polaris Sportsman 500 Dies

You should also check if your Polaris Sportsman 500 dies while you accelerate

1. Fuel

Your Polaris Sportsman may die when it is accelerating because there is not enough fuel. You should refill your gas tank.

Make sure you turn the key three times before you start the engine. Also, make sure that you don’t set the fuel to reserve.

Make sure that you check the fuel quantity and ensure that it is compatible with your ATV. If the fuel is not correct, drain it and replace it.

2. Restricted airflow

ATVs that are not able to breathe properly can also cause ATV bogs. This is a more common problem than the others.

The machine will rev and idle fine when you let the gas off. Otherwise, your ATV may be running too lean or too high. 

This is usually caused by a blocked or dirty carburetor or filter, stuck-on close choke, a clogged main jet, a clogged float bowl, misadjusted or dirty valves, or an air intake tube blockage. Depending on the year of your Polaris Sportsman 500, there are different ways to resolve these problems.

3. Parts malfunction

Your ATV may be experiencing a slow down in throttle application due to faulty spark plug wires, nonworking reverse speed limiter, or electronic throttle control glitches. Sometimes even a bent rocker arm can cause the problem. 

An experienced mechanic may be able to repair the problem by replacing defective parts with OEM ones. These mechanical problems warrant a visit from a Polaris dealer for repairs.

It can be difficult to identify why the Polaris Sportsman 500 stops accelerating. This should not be confused by other issues that may be affecting your quad. 

These problems include the Sportsman overheating, not turning the engine, not starting the machine, misfiring, machine backfiring, stalling, and misfiring. 

For step-by-step instructions on how to troubleshoot specific Polaris ATV problems, always refer to your owner’s guide.

4. Throttle Cable

The ETC (Electronic Throttle Control) is a feature that Carbureted Polaris Sportsman 500 ATVs have. These two metal contacts should not touch. It will cause the machine’s death. 

You will need to adjust the throttle cable if your quad is stalling or dying under acceleration. You must ensure that the throttle cable is routed correctly along the channel on the gas tank. Make sure the throttle channel isn’t kinked or blocked in any way.

5. Cleanliness

Clean quads will not only prolong their life expectancy but also ensure that your vehicle functions properly. 

Sometimes, the Polaris Sportsman 500 will stop accelerating because of dirty spark plugs, fuel vents, or radiator debris.

This is not due to faulty parts. Cleaning your quad regularly will help to preserve its performance. It’s time for you to replace any parts that are too filthy or cannot be cleaned.

EFI Loss of Spark

You should check the wiring for fuel-injected Sportsman 500s. This will help you determine if the wiring is pulled from the sensor connectors. These tiny sensors can short out against the starter and engine case. 

These sensors do not have to be in bad condition. However, they are susceptible to problems due to their soft spots. 

Fuel pressure should be maintained at 39 psi. A fuel pump problem could be triggered if you have a lower or irregular pressure reading. 

These are two additional checks that should be performed in addition to the normal troubleshooting for a carbureted Polaris500.

Polaris CDI Installation

This video shows how to install a Polaris stator, CDI ignition kit, and a 1998 Polaris Sportsman500.

How to install the CDI Box:

  1. Take out the bracket (Torx T25).
  2. The following plugs should be removed from the CDI box.
    • 2 pins plug (pickup coil)
    • 3 pins plug (source coil)
    • Blue/white wire (ignition coil).
    • Black wire (kill switch).
    • A ground wire is a brown wire
  3. As shown in the video, connect the DC CDI box with the corresponding plugs.

The Polaris CDI Kit is a plug-and-play unit. It should be connected to the same plugs as the stock CDI, except for the orange wire which is the hot switched wire. 

This orange wire is used to convert DC kits. It connects to the Polaris Sportsman500 battery via a hotwire terminal.

The box will draw power instead from the stator. On the ’98 model, the hot wire terminals are located on either end of the open terminals next to the switch-top circuit. The bare orange wire can be crimped with a female spade tuner to press it into the junction board.

It is easy to install a DC conversion kit. A DC ignition system upgrade is more cost-effective than a CDI box, which requires a working source coil.

  1. Even if the source coil is not working properly, it will still work.
  2. It will be much easier to start cold.

You can mount the replacement CDI box to a ’98 Sportsman using a cable tie. You should also note that in some cases, only an OEM Polaris CDI replacement will resolve the power loss.

Conclusion – Polaris Sportsman500 Dies When Accelerating

It can be frustrating to see your Polaris Sportsman 500 die during acceleration. Most problems can be traced back to the CDI, which makes it easier to fix and manage.

You can replace the CDI box if it doesn’t require replacement. Your quad will benefit greatly from regular cleaning and a scheduled oil change. You can enjoy the Polaris Sportsman 500 at its full potential with a reduced acceleration.

You should also check if your Polaris Sportsman 500 dies while you accelerate

1. Fuel

Your Polaris Sportsman may die when it is accelerating because there is not enough fuel. You should refill your gas tank.

Make sure you turn the key three times before you start the engine. Also, make sure that you don’t set the fuel to reserve.

Make sure that the fuel volume is checked and that it is compatible with your ATV. If the fuel is not correct, drain it and replace it.

2. Restricted airflow

ATVs that are not able to breathe properly can also cause ATV bogs. This is a more common problem than the others. The machine will rev and idle fine when you let the gas off. Otherwise, your ATV may be running too lean or too high. 

This is usually caused by a blocked or dirty carburetor or filter, a stuck-on-close throttle, a plugged main jet or a junk-filled bowl, misadjusted or dirty valves, or an air intake tube obstruction. Depending on the year of your Polaris Sportsman 500, there are different ways to resolve these problems.

3. Parts malfunction

Your ATV may be experiencing a slow down in throttle application due to faulty spark plug wires, nonworking reverse speed limiter, or electronic throttle control glitches. Sometimes even a bent rocker arm can cause the problem. 

An experienced mechanic may be able to repair the problem by replacing defective parts with OEM parts. These mechanical problems warrant a visit from a Polaris dealer for repairs.

It can be difficult to identify why the Polaris Sportsman 500 stops accelerating. This should not be confused by other issues that may be affecting your quad. 

These problems include the Sportsman overheating, not turning the engine, not starting the machine, misfiring, machine backfiring, and stalling. For step-by-step instructions on how to troubleshoot specific Polaris ATV problems, always refer to your owner’s guide.

4. Throttle Cable

The ETC (Electronic Throttle Control) is a feature that Carbureted Polaris Sportsman 500 ATVs have. These two metal contacts should not touch. It will cause the machine’s death. 

You will need to adjust the throttle cable if your quad is stalling or dying under acceleration. You must ensure that the throttle cable is routed correctly along the channel on the gas tank. Make sure the throttle channel isn’t obstructed or kinked.

5. Cleanliness

Clean quads will not only prolong their life expectancy but also ensure that your vehicle functions properly. 

Sometimes, the Polaris Sportsman 500 will stop accelerating because of dirty spark plugs, fuel vents, or radiator debris.

This is not due to faulty parts. Cleaning your quad regularly will help to preserve its performance. It’s time for you to replace any parts that are too filthy or cannot be cleaned.

EFI Loss of Spark

You should check the wiring for fuel-injected Sportsman 500s. This will help you determine if the wiring is pulled from the sensor connectors. These tiny sensors can short out against the starter and engine case. 

These sensors do not have to be in bad condition. However, they are susceptible to problems due to their soft spots. 

Fuel pressure should be maintained at 39 psi. A fuel pump problem could be a sign of low or irregular pressure. These are two additional checks that should be performed in addition to the normal troubleshooting for a carbureted Polaris500.

Polaris CDI Installation

This video shows how to install a Polaris stator, CDI ignition kit, and a 1998 Polaris Sportsman500.

How to install the CDI Box:

  1. Take out the bracket (Torx T25).
  2. The following plugs should be removed from the CDI box.
    • 2 pins plug (pickup coil)
    • 3 pins plug (source coil)
    • Blue/white wire (ignition coil).
    • Black wire (kill switch).
    • The ground wire is the brown wire
  3. As shown in the video, connect the DC CDI box with the corresponding plugs.

The Polaris CDI Kit is a plug-and-play unit. It should be connected to the same plugs as the stock CDI, except for the orange wire which is the hot switched wire. This orange wire is used to convert DC kits. It connects to the Polaris Sportsman500 battery via a hotwire terminal. The box will draw power instead from the stator. 

On the ’98 model, the hot wire terminals are located on either end of the open terminals next to the switch-top circuit. The bare orange wire can be crimped with a female spade tuner to press it into the junction board.

It is easy to install a DC conversion kit. A DC ignition system upgrade is more cost-effective than a CDI box, which requires a working source coil.

  1. Even if the source coil is not working properly, it will still work.
  2. It will be much easier to start cold.

You can mount the replacement CDI box to a ’98 Sportsman using a cable tie. You should also note that in some cases, only an OEM Polaris CDI replacement will resolve the power loss.

Conclusion – Polaris Sportsman500 Dies While Accelerating

It can be frustrating to see your Polaris Sportsman 500 die during acceleration. Most problems can be traced back to the CDI, which makes it easier to fix and manage.

You can replace the CDI box if it doesn’t require replacement. Your quad will benefit greatly from regular cleaning and a scheduled oil change. You can enjoy the Polaris Sportsman 500 at its full potential with a reduced acceleration.

What year did Polaris Sportsman 500 come out?

The Revamped Best-Seller In response to complaints from customers that the quad felt underpowered, Polaris introduced the 2001 Polaris Sportsman 500. Engineers upgraded the original power engine to a High-put motor with this model.

How fast is a 2004 Polaris Sportsman 500?

Registered. Dbmachine stated that 55 mph is the average speed of a GPS receiver.

Which is better ATV Honda or Polaris?

Honda is well-known for its reliability, ease of use, smooth ride, comfort, and skill. The Polaris glides better than the glass on rough terrain, has great power, an excellent EBS system, and is extremely comfortable to ride.

What was the last year Polaris made the 500 Sportsman?

The 2005 Polaris Sportsman500 was the 10th-year-old model and the last to feature a carbureted engine.

Is Sportsman 500 fuel injected?

The new electronic fuel injection engine produces a lot more power than its carbureted predecessor and has more torque. The electronic fuel injection makes it easy to start the Polaris(r), Sportsman(r), 570.

How much weight can a Polaris Sportsman 500 pull?

Dimensions & Capacities

The wheelbase is 50.5 inches. This ATV weighs 696 lbs. and can hold 4.1 gallons of regular, unleaded gasoline. The front rack can carry 90 lbs. and the rear rack 180 lbs. This ATV can pull 1,225 lbs.

Where is Polaris Sportsman made?

Polaris is located in Roseau (Minnesota), USA. Most components are manufactured in Osceola (Wisconsin), and the vehicle assembly is done in Roseau (Minnesota). This is what we call an American-made ATV.

How much horsepower does a Polaris Ranger 500 have?

The 32HP ProStar engine is proven to deliver performance and power. It’s designed to tackle tough jobs with the highest power in its class. For rough terrain, the fast-engaging On-Demand AWD provides the traction you need.

How fast does a Polaris 570 Sportsman go?

63 mph

The Sportsman 570 is powerful enough to handle many tasks such as hauling and towing. It can reach 63mph with 44 horsepower and will get you there quickly and safely.

Polaris Sportsman 500 FAQ

1. Is a Polaris Sportsman 500 a 4 stroke?

Engine – The 1999 Sportsman 500 is powered by a single-cylinder, liquid-cooled four-stroke SOHC engine. It has a bore stroke ratio of 92x75mm (3.622 x 2.953) inches.

2. What does HO stand for on Polaris Sportsman?

HO = High Output. Polaris has made modifications to increase the output of the same engine displacement, as was already mentioned.

3. How much weight can a Polaris Sportsman 500 pull?

The wheelbase is 50.5 inches. This ATV weighs 696 lbs. and can hold 4.1 gallons of regular, unleaded gasoline. The front rack can carry 90 lbs. and the rear rack 180 lbs. This ATV can pull 1,225 pounds

4. How do you tell what year a Polaris Sportsman 500 is?

The 10th character in the vehicle identification number is the. To determine the year model of your four-wheeler, use the 10th character.

5. How many horsepowers is a Polaris 500?

From 2003 to 2007, Polaris Inc. manufactured the Polaris Predator 500, a 41HP all-terrain quad that provides smooth performance and sufficient power for experienced riders.

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