Al-Ko 675 Lawn Mower Engine Problems

When the starter of your lawn mower or small engine does not catch, this may violate your plans. However, you can take certain actions to prevent and eliminate problems with the starter. This guide will help you learn how to find and fix common problems with starters, for example:

If your engine does not start, you should first check the engine carefully to eliminate common problems (such as heavy carbon deposits on spark plugs or fuel problems) that make it difficult to start.

CAUTION! Always read the engine (s) manual (s) before starting, operating, or servicing the engine or equipment to avoid personal injury or property damage. Contact your authorized dealer or contact Briggs. & Stratton if you are unsure of any procedure or have additional questions. Find all engine hazard warnings

The first step in diagnosing a lawnmower starter is to make sure that the engine can spin properly. To do this, remove the spark plugs and slowly rotate the crankshaft. In addition, check for dirt or debris on the starter gear shaft and apply lithium grease to the shaft.

Problems with a lawn mower starter & their elimination

Use the list below to troubleshoot 12 volt starter systems. If you test any parts with a multimeter, you should get a 12 volt reading.
NOTE. In order to extend the life of the starter, use short start cycles (maximum five seconds). Wait one minute between start cycles.

If the starter turns the engine too slowly, there is probably a problem with.

  • The additional load interferes with the work. If this does not happen at a lighter load, contact your Briggs service dealer. & Stratton to learn how to increase productivity.
  • A discharged battery, a faulty electrical connection (battery circuit), battery wires that are too long or wire gauge too small, or an incorrect size battery (too small) To fix these problems, check the battery and charging system for malfunctions.
  • Oil viscosity not appropriate for temperature. Use the Small Engine Frequently Asked Questions (FAQs) for information on choosing the right lubricant for your lawn mower or outdoor power equipment.
  • Dirty or worn collector, starter bearing, loose magnet, etc.
  • Worn brushes or loosened brush springs.
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For dirty or worn parts, use our Spare Parts Search to find matching replacement parts. Local Briggs Dealer & Stratton can also help you find and replace faulty parts in a small engine.

If the engine does not spin, the problem is probably related.

  • Low / defective battery or defective electrical connections. To fix these problems, check the battery and charging system for malfunctions.
  • Defective parts: possibly fuses, starter motor switch (open circuit) or solenoid.
  • Jamming brushes, etc.

For this type of advanced repair, we recommend that you use the Briggs repair manual. & Stratton for complete and detailed instructions on checking for defective parts or contact your Briggs service dealer & Stratton for help.

If the starter rotates but does not spin the engine, the problem is probably related.

  • Defective or damaged battery. To fix these problems, check the battery and charging system for malfunctions.
  • Wrong direction of rotation due to a change in motor polarity or battery polarity: all motors rotate counterclockwise when viewed from the gear side. If the engine rotates clockwise, try reconnecting the battery.
  • Driving gear problems: sticking due to a dirty / damaged slot, or a damaged gear or gear. Use the illustrated Briggs spare parts list & Stratton & to find appropriate parts and check for dirt or damage. Clean or replace if necessary.
  • Starter clutch slip. To solve this problem, disassemble the coupling, clean the base and ball bearings with a carburetor cleaner, and reassemble.

If the starter motor rotates and does not stop, the problem is probably related to.

  • Starter switch malfunction
  • Defective solenoid

Using your engine manual and digital multimeter, you can check the starter and / or solenoid to make sure they are working properly. We recommend that you consult your extensive repair manual for complete inspection instructions for each part or contact your Briggs dealer. & Stratton for help regarding repairs.

Repair of lawn mowers, both gasoline and electric, may be needed at the most unexpected moment. We will talk about the main breakdowns of home-made and proprietary equipment, tell you what to look for, and by what signs it is possible to recognize a malfunction.

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Video: Al-Ko 675 Lawn Mower Engine Problems


Lawn mower. A wonderful alternative to a manual braid, which facilitates and accelerates the mowing of grass in a variety of places, including those where a conventional braid simply does not turn around. But behind the comfort and convenience is a sophisticated modern mechanism that requires tireless attention and regular maintenance.

Regardless of the manufacturer, all units have a similar design. Therefore, repairing the Viking do-it-yourself mower is done similarly to repairing other brands: Husqvarna, Calm, Bosch, Gardena, Oleo Mac. A self-made lawn mower will not be an exception, but repairing a breakdown requires basic knowledge. Consider the most common causes of engine failure, and do-it-yourself lawn mower repairs in the field.

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Repair of mechanical parts for all types of lawn mowers

Regardless of the type of engine, the mechanical part of the scythe includes knives, a device for ejecting or storing grass, and a transmission mechanism. Most often, knives fail or the fishing line ends.

Al-Ko 675 Lawn Mower Engine Problems

Cleaning the mechanical part of the Bosh mower

Broken or bent knives are visible to the naked eye. Depending on the material and the degree of damage, the knives are replaced or restored by simple bending to the initial state. With severe wear, the cutting part can be sharpened. A do-it-yourself lawnmower made from a trimmer can fail for many reasons. Most often, this is an excess of the maximum allowable load on the torque and engine, since a knife is used instead of fishing line.

Restoring the trimmer gas handle

During inspection, check the condition of the grass feed duct into the container and clean it if necessary. complex mechanical breakdowns require a sophisticated tool, special equipment, professional skills, and it is better to entrust professionals with troubleshooting.

DIY electric mower repair

Not only factory ones, but also homemade electric lawn mowers fail. The main reason for the motor to stop is loss of contact and lack of power at the motor terminals.

Drawing of an electric lawn mower with TBH 1650 as an example

Therefore, the first thing we check is the presence of voltage in the power outlet, the condition of the electrical cord and the absence of breakage. Then, if a commutator motor is used, it is necessary to check the condition of the brushes and replace them with strong wear. A manual mower with a collector motor is characterized by increased survivability, but requires regular brush replacement.

DIY electric mower engine repair

Asynchronous hand-held lawn mowers also have problems. Often the phase-shifting capacitor fails, but it is problematic to verify it in the field. An indirect sign of capacitor failure is:

  • jerking of the motor at the moment of power supply;
  • strong engine heating even at low load;
  • reduced speed;
  • characteristic buzz.

Electric do-it-yourself mower is made from improvised materials that may fail. If a malfunction is detected, in any case, you need to make sure that the voltage is applied to the motor terminals, and if not. check the operation of the switch.

DIY Electric Lawn Mower

If there is voltage, a capacitor or brushes. in order, the most likely cause of breakage is a burned-out winding. In this case, the unit will have to be returned to the repair shop. Self-made electric lawn mowers most often have to be repaired independently, since all the nuances of its operation are not taken into account when assembling the device.

DIY electric mower repair video

Repair of a lawn mower with a gasoline engine

In lawn mowers, gasoline two-stroke internal combustion engines are used. When deciding how to make a lawn mower with their own hands, they often use engines from other household devices. chainsaws, compressors, motor plows and trimmers. The process of finding and fixing the problems of these engines is carried out according to one algorithm. Do-it-yourself gasoline mower repair starts with determining the cause of the failure.

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General layout of a gas mower

The engine starts and runs normally, but the knives do not rotate

In this case, failure of the mechanical part is guaranteed or, as an option, its fastening to the motor shaft is destroyed.

Do-it-yourself mechanical breakdown and repair of the Viking lawn mower

Starts poorly, but works fine

A do-it-yourself mechanical lawn mower with a gasoline engine does not start well, but it works normally in operating modes (when gas is supplied). Such a malfunction can be caused by two reasons. failure to adjust the idle system in the carburetor or improper fuel composition.

Detail drawing of a gas mower

To eliminate it, you should start with fuel, combine gasoline and oil of the right grades in the required proportion and pour this fuel into the tank instead of the old one. If it doesn’t help. remove and disassemble the carburetor and adjust the idle system in accordance with the manufacturer’s instructions.

The engine starts poorly and is unstable in all modes

The most probable reasons: fuel nozzles clogged, fuel filter clogged, air filter clogged. To eliminate: the nozzles are blown with compressed air, the filters are changed or washed, depending on their design.

Bosh Lawn Mower Engine Repair

The engine starts, but does not hold the load

If the engine starts and runs at idle, but poorly holds the load during operation. Most likely takes place "oxygen starvation". Do-it-yourself repair of lawn mowers is done by replacing or cleaning "purge method" air filter.

Lawn mower repair if engine fails to start

It happens that despite the presence and normal supply of fuel, the engine does not start. Most often, the absence of signs of life indicates a failure of the ignition coil. If, during visual inspection, all electrical circuits are in order, then this coil will need to be replaced.

Do-it-yourself lawnmower engine repair

Less common case. heavy soot or spark plug failure. It is determined by visual inspection of the twisted out candle. The most effective way to identify this malfunction. replace the candle with another, obviously working. When thinking about how to make a lawn mower if the engine does not start, pay attention to replacing candles with new ones, and preferably more reliable ones.

How to make a do-it-yourself lawn mower video

Given the feature "field conditions", in which lawn mowers are operated, the manufacturers of these devices have tried to protect their consumers from possible problems. But, as you know, even a manual mechanical lawnmower, made with your own hands, can one day fail. We really hope that our advice will help you in this case and will direct the troubleshooting in the right direction.