Polaris Scrambler 850 Problems And Their Solutions

The Polaris Scrambler 850 is an all-terrain vehicle (ATV) designed for off-road adventures.

It features a powerful 4-stroke, liquid-cooled engine with a displacement of 850cc, making it one of the most powerful ATVs in its class.

Polaris Scrambler 850 Problems

The engine is a twin-cylinder SOHC (single overhead cam) design with electronic fuel injection, which delivers smooth and responsive power to the wheels.

The Scrambler 850 has a maximum horsepower of around 77 horsepower, which is more than enough to handle most off-road terrain.

But despite the above features it have some common problems as many users reported on online forums.

We have gathered a list of common problems that people experience with their Polaris 850 including starter Problems, Engine Problems, EPS Problems, Idle Problems, Clutch Problems, Steering Problems, Transmission Problems, Hydraulic Problems, Fuel Pump Problems and Overheating Problems.

Quick Overview of Problems And Solutions

Problem Solution
Starter problems Check battery and starter connections; replace if necessary
Engine problems Regular maintenance; check oil and filters
EPS problems Check EPS fuse and connections; replace if necessary
Idle problems Adjust idle speed; check air filter
Clutch problems Adjust clutch; check belt for wear and damage
Steering problems Check steering components for damage and wear
Transmission problems Check transmission fluid level and condition
Hydraulic problems Check hydraulic fluid level and condition

Common Polaris Scrambler 850 Problems and Their Solutions

So let’s find the real solutions to the problems that occur with Polaris Scramble 850 ATV.

1. Starter Problems

Are you experiencing starter problems with your Polaris Scrambler 850? If you are, then you are not alone.

Many Polaris Scrambler 850 owners have reported issues with their starters failing to do their job. But what exactly are starter problems?

Well, let’s break it down.

Starter problems can refer to a multitude of issues that could prevent the starter from working properly.

Some of the most common causes of starter problems in the Polaris Scrambler 850 include a dead battery, faulty starter solenoid, a bad starter motor, and even issues with the wiring connecting the starter to the battery.

So, how can you fix these starter problems? Here’s a step-by-step guide to solving some of the most common starter problems:

1. Check Your Battery:

If your battery is dead or low on power, then your starter won’t be able to function. Check to see if your battery has enough juice to start your ATV.

2. Test Your Starter Solenoid:

The starter solenoid is responsible for connecting the battery to the starter motor. A faulty solenoid will prevent the starter from functioning. Use a voltmeter to test the solenoid.

3. Check the Starter Motor:

If your starter motor is bad, then it won’t be able to turn over the engine. Check to see if the motor is making any noise when you try to start the ATV.

4. Inspect the Wiring:

The wiring connecting your starter to the battery can also be a culprit for starter problems. Check to see if the connections are loose or corroded.

By following these steps, you’ll be able to diagnose and fix most starter problems in your Polaris Scrambler 850.

But if you’re still having issues, it’s best to take it to a professional mechanic who can help you further troubleshoot the issue.

2. Engine Problems

It is important to identify the main causes and know how to fix them in step-by-step detail. Here are some common engine problems and solutions:

1. Overheating:

The leading cause of engine overheating is insufficient or dirty coolant. Ensure your coolant is clean and filled to the proper level.

Clean your radiator regularly, replace faulty hoses, and check your water pump for damage.

2. Fuel Issues 

Poor fuel quality, dirty filters, and leaky lines can all cause engine problems. Check for visible leaks, replace defective fuel filters, use high-quality fuel, and clean the fuel injectors or carburetor.

3. Electrical Problems

Defective spark plugs, ignition coils, and diodes can cause engine misfires or difficulty starting. Check these components for wear or damage and replace them as needed.

4. Low Oil Pressure

Low oil pressure can cause engine damage, and it’s important to address it immediately. Check for leaks, ensure your oil filter is clean, and maintain the proper oil level.

5. Starting or idling issues

If your Polaris Scrambler 850 is having trouble starting or idling smoothly, it could be due to a malfunctioning spark plug, clogged fuel filter, or degraded fuel system.

6. Mechanical Failure

Worn or damaged engine parts can also cause failure, which requires professional repair or replacement. However, regular maintenance can prevent mechanical problems, including oil changes, filter replacements, and ongoing inspections.

3. EPS Problems

The EPS system is designed to make steering your ATV easier and more comfortable, but like any other mechanical system, it can develop issues over time.

One of the most frequent causes for EPS problems is a low battery voltage. The EPS system relies on the ATV’s battery to function properly, so if the battery is low or faulty, it can cause the EPS to fail.

Another issue that can disrupt the EPS is a faulty power steering motor.

This can cause the motor to generate excessive heat, which can damage other components in the EPS system.

A damaged or malfunctioning EPS control module can also lead to problems with your ATV’s steering system.

If you’re experiencing issues with your EPS, the first step is to check the battery voltage.

You can use a digital multimeter to measure the voltage of the battery. If the voltage is below 12 volts, you may need to recharge or replace the battery.

Another possible solution is to check the battery terminals for corrosion, as this can cause poor connectivity and affect proper EPS function.

If the battery is functioning correctly, you can check the power steering motor next.

Inspect the motor and its wiring to determine if there is any damage or wear. If you find any damages, replace the defective parts with new ones.

Additionally, make sure that your power steering pump is working properly, as it can impact the motor’s performance.

Lastly, if the EPS control module is damaged, you will need to replace it with a new one.

A faulty EPS control module can cause the system to shut down entirely and render your ATV undrivable.

However, before replacing the module, check the EPS wiring for damage or loose connections, as this can also be the source of the problem.

4. Idle Problems

Idle problems occur when your ATV does not run smoothly at its lowest speed. This issue can be frustrating, especially for beginners who might not know how to diagnose and fix the problem.

But fret not, as we’re here to help you understand this problem and give you practical solutions to fix it step by step. The main causes of idle problems in Polaris Scrambler 850 include clogged air filters, dirty fuel injectors, faulty oxygen sensors, and a malfunctioning throttle position sensor.

Clogged air filters restrict airflow, which can cause a shortage of air and fuel mixture. Dirty fuel injectors can impair the fuel system and the combustion process, leading to rough idling.

A malfunctioning oxygen sensor may cause an improper air-to-fuel ratio, while a faulty throttle position sensor might not regulate the throttle opening, causing rough idling.

To fix these problems, start by cleaning or replacing the air filters, fuel injectors, and oxygen sensors.

Check your service manual for proper instructions on how to clean or replace these components. You may also need to reset the throttle position sensor and ensure that it is functioning correctly.

Another potential issue could be a vacuum leak or an electrical problem.

These issues require advanced mechanical skills, and it is recommended to take your ATV to a licensed mechanic for professional repair.

Additionally, the idle problem could be due to a malfunctioning fuel pump.

A faulty fuel pump can disrupt the fuel pressure, causing the engine to stutter or stall at idle.

To remedy this, you would need to replace your fuel pump, a task that is best left to a professional mechanic or dealership service center.

Lastly, a bad spark plug can also cause idle problems. Faulty spark plugs can compromise the ignition system’s performance, preventing it from firing timely and correctly and causing rough engine operation and idle issues.

Replacing your spark plugs with the manufacturer’s recommended spark plugs can fix this issue.

5. Clutch Problems

A clutch is a mechanical device that connects and disconnects the transmission and engine. It’s a crucial part of any vehicle that uses manual transmission, including your Polaris 850.

As with any mechanical device, clutches can develop problems.

Some of the most common causes of clutch problems include worn clutch discs, pressure plate issues, and hydraulic system faults.

These issues can cause to experience slipping, difficulty shifting gears, or even full clutch failure.

So, what can you do if you’re experiencing clutch problems? Here are the steps to diagnose and fix clutch problems properly:

Step 1: Check for external damage

The first thing you should do is to check the clutch assembly for any external damage or wear. Look for any signs of clutch dust or residue.

If you see any visible damage, it’s time to replace the clutch entirely.

Step 2: Inspect the clutch discs

Remove the cover and inspect the clutch discs.

If you notice any signs of wear or damage, replace the clutch discs, pressure plates, and release bearing.

Step 3: Check the hydraulic system

The hydraulic system is an essential part of the clutch assembly.

Check for leaks, damaged hoses or cylinders, and low fluid levels. If you find any issues, you’ll need to repair or replace these components.

Step 4: Adjust or replace the clutch cable

If you’re experiencing difficulty shifting gears, the clutch cable may need adjustment or replacement. Follow the manufacturer’s instructions to properly adjust or replace the cable.

6. Steering Problems

Steering problems can make your off-road experience frustrating and sometimes dangerous. Therefore, it’s essential to identify the causes and fix them immediately to ensure a smooth ride.

The main causes of steering problems in a Polaris Scrambler 850 are worn steering components, damaged suspension, bent tie rods, and misaligned wheels.

Worn steering components, such as the steering rack, ball joints, and tie rod ends, can make your steering loose and sloppy.

Damaged suspension can cause the wheels to bounce uncontrollably, making it challenging to steer. Bent tie rods can lead to incorrect steering angles, causing erratic behavior in the vehicle.

Misaligned wheels can also result in steering problems, leading to premature tire wear and poor handling.

To fix steering problems in your Polaris Scrambler 850, you first need to inspect and identify the root cause of the problem.

Once you have determined the cause, you can proceed with fixing it step by step.

If you have worn steering components, you need to replace them. You can do this by removing the old components and installing new ones.

If you have a damaged suspension, you need to repair or replace it. This will involve disassembling the damaged part and installing a new one.

If you have bent tie rods, you need to straighten or replace them.

This can be done by using a tie rod straightener or by purchasing new ones.

Finally, if you have misaligned wheels, you need to align them properly.

This involves adjusting the caster and camber angles to ensure that the wheels are perpendicular to the ground and parallel to each other.

7. Transmission Problems

Transmission, in simple terms, is a mechanism that transmits power from the engine to the wheels, allowing your Polaris Scrambler 850 to move.

It plays a crucial role in your ATV’s performance and should not be taken lightly.

However, like any other mechanical component, the transmission can develop problems that can harm your ride quality and even render your ATV unusable.

There are several causes of transmission problems that you should be aware of as a Polaris owner.

These include low transmission fluid levels, worn-out gears, faulty sensors, and water damage, among others.

Low transmission fluid levels can cause the transmission to overheat and damage its internal components.

Worn-out gears, on the other hand, can cause gear slippage, reduced power output, and damage to other transmission components.

Additionally, faulty sensors can cause the transmission to shift poorly or not at all, while water damage can corrode internal transmission parts and cause rust.

Fortunately, fixing transmission problems can be a straightforward process if you follow these simple steps.

First, identify the exact problem by inspecting your ATV’s transmission fluid levels and checking for any obvious signs of damage.

Next, drain the old fluid and replace it with the recommended type and amount. You can also replace worn-out gears or faulty sensors if necessary.

Finally, test your ATV on different terrains to ensure that the transmission is functioning correctly.

8. Hydraulic Problems

Hydraulic problems can significantly affect your vehicle’s performance and can even pose a safety risk if left unresolved.

One of the most common causes of hydraulic problems is low fluid levels. If the hydraulic fluid is low, it can cause the system to malfunction and not operate correctly.

Additionally, debris and contaminants in the fluid can lead to clogging and damage of the hydraulic components.

Another cause of hydraulic problems is a worn or damaged hydraulic pump, which can result in a loss of pressure and an inability for the hydraulic system to properly function.

So, how can you fix these issues? Firstly, it’s important to check the hydraulic fluid levels regularly and top up as necessary. This can go a long way in avoiding problems from low fluid levels.

Additionally, establishing a regular maintenance schedule can help to identify any possible contaminants or debris in the fluid before they cause problems.

If you notice any debris or contaminants, it’s important to flush the system and replace the fluid.

If your hydraulic pump is worn or damaged, it may need to be replaced entirely.

This can be done by removing the old pump and fitting a new one, following the manufacturer’s instructions step-by-step.

Alternatively, if the pump is simply worn, you may be able to repair it by replacing the seals. This is a more cost-effective solution but requires technical know-how and skills.

9. Fuel Pump Problems

Another common problem that Scrambler 850 owners may encounter is fuel pump problems. But what exactly are fuel pump problems, and how can you fix them?

Fuel pump problems can occur when there is a lack of fuel flow to the engine.

This can cause a variety of issues, including difficulty starting the vehicle, poor performance, and even stalling while driving.

The main causes of fuel pump problems can range from a clogged filter to a malfunctioning fuel pump relay.

One way to fix fuel pump problems is to first check the fuel filter.

A clogged filter can restrict the flow of fuel to the engine, causing it to struggle to get enough energy.

To fix this, simply replace the fuel filter with a new one.

Another issue that can cause fuel pump problems is a faulty fuel pump relay.

This device controls the flow of fuel to the engine and can malfunction over time.

To fix this, locate the fuel pump relay and replace it with a new one.

In some cases, your fuel pump itself may be the problem. When this happens, you will need to replace the entire fuel pump.

This can be a more complicated process, as it involves removing and replacing parts of the fuel system.

If you’re not comfortable with this level of maintenance, we recommend taking your vehicle to a professional mechanic.

10. Overheating Problems

Overheating occurs when the engine temperature rises above the normal operating range.

This can happen due to a variety of reasons, including a malfunctioning cooling system, a clogged radiator, low coolant levels, or a faulty thermostat.

One of the main causes of overheating in the Polaris Scrambler 850 is a malfunctioning cooling system.

The cooling system is responsible for regulating the engine’s temperature by circulating coolant through the engine and radiator.

If the cooling system is not functioning properly, the engine can quickly overheat.

To fix this issue, start by checking the coolant levels.

If the levels are low, top off the coolant and check for any leaks. If you find any leaks, be sure to address them before refilling the coolant.

If the coolant levels are normal, move on to the radiator.

A clogged radiator can also cause overheating in the Polaris Scrambler 850.

Over time, debris can build up inside the radiator and obstruct the flow of coolant.

To fix this issue, remove the radiator and clean it thoroughly. Use a mixture of water and radiator flush to clear any debris and ensure proper flow.

Finally, a faulty thermostat can also cause overheating.

The thermostat regulates the flow of coolant through the engine. If the thermostat is stuck closed, it can prevent the flow of coolant and cause the engine to overheat.

Replace the thermostat to fix this issue.

Polaris Scrambler 850 Specs

Specification Details
Engine 850cc SOHC 4-Stroke Twin Cylinder
Horsepower 78 HP
Transmission Automatic PVT P/R/N/L/H
Drive System True On-Demand AWD/2WD
Front Suspension Dual A-Arm with Stabilizer Bar, 9 in (22.9 cm)
Rear Suspension Rolled Independent Rear Suspension (IRS), 10.25 in (26 cm)
Brakes Single Lever 4-Wheel Hydraulic Disc with Hydraulic Rear Foot Brake
Dry Weight 767 lb (348 kg)
Fuel Capacity 5.25 gal (19.9 L)
Tires Front: 26 x 8-14; Rear: 26 x 10-14

What Do The Users Think About Polaris Scrambler 850

When it comes to the Polaris Scrambler 850, users have a lot to say about this impressive ATV.

Most users report high levels of satisfaction with their vehicle, citing its powerful engine, smooth handling, and impressive off-road capabilities as some of its most noteworthy features.

However, like with any vehicle, some users have reported encountering problems with their Polaris Scrambler 850.

One of the most commonly reported issues is with the radiator, which some users have found to be prone to leaks or cracking under certain conditions.

Other users have reported issues with the transmission or the suspension, although these tend to be less common than problems with the radiator.

Despite these occasional issues, most users find that the Polaris Scrambler 850 is a highly reliable and enjoyable vehicle to use.

It’s no wonder that this ATV has garnered such a devoted following among ATV enthusiasts, who appreciate its combination of power, agility, and durability.

So if you’re in the market for a new ATV and you’re wondering whether the Polaris Scrambler 850 is right for you, rest assured that this vehicle has a lot to offer.

Just be aware that, although rare, some users may encounter issues with their radiator or other components.

Frequently Asked Questions

How much horsepower does Polaris Scrambler 850 have?

It has a maximum horsepower of 78.

What is the top speed of the Polaris Scrambler 850?

The top speed of the Polaris 850 is approximately 75 miles per hour.

What is the weight of the Polaris Scrambler 850?

The weight is approximately 785 pounds.

What is the fuel capacity of the Polaris Scrambler 850?

It has a fuel capacity of 5.25 gallons.

What is the wheelbase of the Polaris Scrambler 850?

The wheelbase is approximately 53 inches.

What is the ground clearance of the Polaris Scrambler 850?

The ground clearance is approximately 11.5 inches.

What type of engine does Polaris Scrambler 850 have?

It is powered by a 4-stroke, twin-cylinder engine.

What is the price of the Polaris Scrambler 850?

The price may vary depending on the year and location, but generally ranges from $10,000 to $13,000.


The Polaris Scrambler 850 is an incredible machine that offers riders extreme power and endless adventure.

However, like any high-performance vehicle, it is not without its problems.

In this blog post, we have explored some of the most commonly reported issues with the Polaris Scrambler 850 and provided practical solutions for each one.

But, as we wrap up this discussion, it’s important to note that the issues with the Polaris Scrambler 850 should not overshadow the many benefits of owning one.

One unique perspective to consider is that while it may seem like the problems associated with the Polaris Scrambler 850 can be a source of frustration and even discouragement, they can also be viewed as opportunities for growth and learning.

For example, the overheating issue that some riders have experienced can be a chance to learn about proper maintenance and cooling procedures.

The stalling issue can be a chance to check for faulty engine components and make upgrades to increase the performance of the vehicle.

Furthermore, it’s essential to remind ourselves that no machine is perfect, and every brand has its fair share of issues.

We cannot let the challenges discourage us from experiencing the joys of off-roading and exploring nature’s beauty.

The Polaris Scrambler 850, in particular, offers riders an exhilarating experience that is unmatched.

It’s a machine that can take you places you have never been before and help you discover new aspects of yourself.