Most Common Mountfield SP185 Problems And How To Fix Them

The Mountfield SP185 is a good choice for those who desire a well-maintained lawn without the hassle of manual labor. This lawn mower is designed to make your lawn mowing experience effortless and efficient. With its powerful engine and user-friendly features, the Mountfield SP185 is a reliable companion for maintaining a beautiful lawn. But you can expect to encounter some problems when using the Mountfield SP185, and today we’ll be looking at some of those problems and how to resolve them. Let’s find out more.

Table of Contents

What Is The Mountfield SP185?

The Mountfield SP185 is a self-propelled petrol lawnmower that combines power and user convenience. It is equipped with a robust and powerful engine that delivers high performance, making it suitable for tackling even the toughest grass. The Mountfield SP185’s self-propelled feature allows the lawnmower to move forward effortlessly, reducing the strain on the user. With its cutting-edge technology and very durable construction, the Mountfield SP185 is built to withstand the test of time.

Mountfield SP185 Problems

1. Initial Starting Issues

If your Mountfield SP185 self-propelled lawnmower is giving you issues with the initial starting then you will not be able to use it to mow your lawn or grass as wanted, this problem usually means that there’s;

  • Low or bad fuel
  • Debris or unusual particles in fuel tank
  • A faulty spark plug

Troubleshooting The Intial Starting Issues

  • Make sure that the fuel tank is adequately filled with fresh/good petrol, as stale fuel can cause starting problems.
  • Also check for any debris or water in the fuel tank as these substances can also hinder the starting process.
  • Remove the spark plug and examine it for signs of damage or wear. If the spark plug appears dirty or worn out then it is recommended to replace it with a new one.
  • Also remember to check the spark plug gap and adjust it if necessary, as an incorrect gap can hinder the ignition process.

2. Engine Performance Issues

If your Mountfield SP185 self-propelled lawnmower is having engine performance issues then it may result in mulching and power cutting quality, if your self-propelled petrol lawnmower has poor engine performance the it may be due to;

  • A clogged or dirty air filter
  • A faulty fuel system
  • Incorrect throttle settings

Troubleshooting Engine Performance Issues

  • You should regularly inspect the air filter and clean it if necessary because if the air filter is damaged or excessively dirty, it is advised to immediately replace it with a new one.
  • Also inspect the fuel lines, fuel filter and carburetor for any blockages or damage, and then clean or replace any components that appear to be compromised.
  • It is also important to ensure that the fuel tank cap is venting properly, as a blocked vent can cause fuel flow issues.
  • You may have to refer to the Mountfield SP185’s user manual for the correct throttle and choke settings based on the mowing conditions, and so adjust these settings accordingly to optimize engine performance and fuel efficiency.

3. Cutting And Mulching Issues

Cutting and mulching issues can be very frustrating if all you’re looking for from your Mountfield SP185 self-propelled lawnmower is good lawn mowing capabilities. These problems are usually caused by;

  • A dull or damaged blade
  • Wrong cutting adjustment
  • A clogged mower deck

Troubleshooting The Cutting And Mulching Issues

  • Check the cutting blade for any signs of wear or damage and if the blade is blunt or has nicks then it is recommended to sharpen or replace it.
  • Make sure that the cutting height adjustment mechanism is functioning correctly and that the correct cutting height is properly set.
  • Be sure to also regularly clean the mower deck to prevent any accumulation by using a brush or scraper to remove any grass clippings and debris.
  • Also make sure that the discharge chute is clear and unobstructed to allow proper grass clippings disposal.

4. Self-Propulsion Feature Problems

The self-propulsion feature of the Mountfield SP185 is one of the lawnmower’s best qualities, it allows the user to effortlessly push the lawnmower without most of the effort required to push regular lawnmowers however it is far from perfect. These problems can be due to;

  • A damaged or worn-out drive belt
  • Damaged drive wheels
  • A faulty drive cable

Troubleshooting The Self-Propulsion Feature Problems

  • Inspect the drive belt for any signs of wear, cracking or stretching and if the drive belt is damaged, it should be replaced with a new one. Also make sure that the drive belt is properly tensioned for optimal self-propulsion functionality.
  • Check the Mountfield SP185’s drive wheels for any wear or damage and if the drive wheels are worn out or show signs of damage, they should be replaced.
  • The drive cable connects the self-propelling system to the engine so inspect the drive cable for any signs of damage such as fraying or stretching. If the drive cable is compromised then it should be replaced.

5. Lawnmower Maneuverability Problems

If you are having trouble controlling your Mountfield SP185, even with the self-propulsion feature in good condition then you may have an issue with;

  • Clogs or obstructions
  • Dried out parts
  • Worn-out wheels

Troubleshooting Lawnmower Maneuverability Problems

  • After each use be sure to clean the Mountfield SP185 self-propelled lawnmower to remove any accumulated grass clippings, debris and dirt.
  • Always apply lubricating oil to the wheels, axles and other moving components as recommended in the Mountfield SP185’s user manual because lubrication reduces friction and wear whilst also prolonging the lifespan of the lawnmower.
  • You may have to replace your Mountfield SP185’S wheels if they are worn-out or damaged.

How To Avoid Mountfield SP185 Problems

  • Be sure to regularly inspect the self-propelled lawnmower for any signs of wear or damage and address any issues as quickly as you notice them.
  • Use fresh and clean petrol to prevent fuel-related starting and performance problems.
  • Avoid using the self-propelled lawnmower on wet grass, as this can cause clumping and clogging thus leading to cutting and mulching issues.
  • Keep the Mountfield SP185 lawnmower’s cutting blade sharp to ensure a clean and precise cut.

How Often Should I Service My Mountfield SP185?

The Mountfield SP185 should be serviced according to the manufacturer’s recommendations you’ll find in the user manual.

Can I Use The Mountfield SP185 On Uneven Terrain?

While the Mountfield SP185 is designed to handle various terrains, including uneven surfaces, it is advised that you exercise caution. Uneven terrain can increase the risk of damage to the self-propelled lawnmower and compromise its performance.


The Mountfield SP185 is an efficient self-propelled petrol lawnmower that can help put some hours back on your watch as it requires less effort to ise than traditional lawnmowers and by following the tips in this article, you can easily address the common problems that may arise with the Mountfield SP185. Always remember that regular maintenance, proper care and listening to the manufacturer’s recommendations will ensure that your Mountfield SP185 performs at its best, allowing you to achieve a perfectly manicured lawn with relative ease.