The Scheppach MS173-51, MS173-51E, MS173-51SE, MS173-51 Plus and Woodster TT173-51 / TT173-51E petrol lawn mowers are designed for regular maintenance of medium to large lawns and gardens. With their 51 cm cutting width, they allow large areas to be mown efficiently while remaining easy to manoeuvre. Depending on the version, they may be equipped with a self-propelled drive system, electric start, mulching function or grass collection system.

These lawn mowers were produced in several versions and over different manufacturing periods. Some components may therefore vary depending on the exact model, production date and serial number. It is important to check this information before ordering a replacement part.

In this category, you will find our selection of replacement parts for Scheppach MS173-51, MS173-51E, MS173-51SE, MS173-51 Plus and Woodster TT173-51 / TT173-51E lawn mowers: blade, blade holder, drive belt, wheels, carburettor, air filter, recoil starter, ignition coil, cables, drive parts, engine components, grass collector parts and other items required for maintenance and repair.

A wide range of parts for Scheppach MS173-51 and Woodster TT173-51 lawn mowers

Many mechanical components and wear parts can be replaced individually on these lawn mowers.

Depending on your machine version, you may find:

• 510 mm lawn mower blade.

• Blade holder.

• Blade fixing bolt.

• Drive belt.

• Pulley and transmission components.

• Front and rear wheels.

• Drive gears.

• Drive cable.

• Throttle cable.

• Bowden cables.

• Control levers.

• Carburettor.

• Carburettor gaskets.

• Air filter.

• Air filter housing.

• Spark plug.

• Ignition coil.

• Recoil starter.

• Fuel tank.

• Fuel tank cap.

• Fuel hoses.

• Engine parts.

• Exhaust and gaskets.

• Battery for electric-start versions.

• Charger depending on the version.

• Side discharge deflector.

• Mulching cover.

• Grass collector and related components.

• Springs, axles, pins and washers.

• Handlebar components.

• Screws and other mechanical parts.

This wide selection allows you to work on the main systems of the machine: cutting system, engine, self-propelled drive, transmission, wheels, starting system, ignition, controls, mulching and grass collection.

510 mm blade for Scheppach MS173-51

With a 51 cm cutting width, the MS173-51 series lawn mowers use a 510 mm blade designed for their cutting system.

The blade is one of the most heavily used components during mowing. It rotates at high speed and can gradually lose its cutting edge. It can also become damaged after hitting:

• A stone.

• A root.

• A branch.

• A kerb or border.

• A metal object.

• Any other obstacle hidden in the lawn.

A worn blade can tear the grass instead of cutting it cleanly. A bent or badly damaged blade can also cause vibrations and place excessive stress on the blade holder and engine shaft.

It is therefore advisable to check the blade regularly and replace it when it shows significant wear or deformation.

Blade holder and blade fixing

The blade holder connects the engine shaft to the blade. Its condition is essential for holding the blade securely and ensuring smooth rotation.

After a significant impact, it is advisable to check:

• The blade.

• The blade holder.

• The fixing bolt.

• The engine shaft.

• Any unusual vibrations.

A bent blade holder may continue to cause imbalance even after a new blade has been fitted.

The fixing bolt should also be inspected and replaced if its condition no longer guarantees safe tightening.

Drive belt and self-propelled system

Self-propelled versions use a transmission system to drive the wheels.

Several components may be involved:

• Drive belt.

• Pulley.

• Drive cable.

• Drive lever.

• Tension springs.

• Drive gears.

• Drive wheels.

• Transmission components.

Over time, a drive belt may stretch, become loose, crack or wear along the sides. It may then begin to slip and no longer transmit power correctly.

If the engine runs normally but the lawn mower moves forward with difficulty or no longer drives itself, it is best to inspect the complete mechanism.

The problem may also come from a cable, gear or another transmission component.

Wheels and drive gears

The wheels are subjected to considerable stress throughout the life of a lawn mower. The weight of the machine, uneven ground and frequent changes of direction can all cause wear.

On self-propelled versions, the drive gears are also involved in transmitting power to the wheels.

Wear to these components may cause:

• Poor traction.

• Jerky movement.

• One wheel driving less effectively.

• Excessive play.

• Irregular rotation.

If there is a drive problem, it is therefore advisable to inspect the wheels, gears, axles, washers and other associated components together.

Carburettor and engine fuel supply

The carburettor controls the air-fuel mixture required for the petrol engine to operate.

A dirty or faulty carburettor may cause:

• Starting difficulties.

• Unstable engine speed.

• Loss of power.

• Stalling.

• Irregular operation.

However, these symptoms can have other causes. Before replacing the carburettor, it is therefore advisable to also check:

• Air filter.

• Spark plug.

• Fuel supply.

• Fuel hoses.

• Ignition coil.

Depending on the manufacturing period, several carburettor part numbers may have been used on the MS173-51 and TT173-51 models.

Air filter for Scheppach MS173-51

The air filter protects the engine from dust, grass debris and other particles in the working environment.

A heavily clogged filter can restrict airflow to the engine and cause:

• Reduced performance.

• Poor acceleration.

• Irregular engine operation.

• Excessive fuel consumption.

• Faster engine fouling.

It is therefore advisable to inspect the air filter regularly and replace it when it becomes excessively dirty or damaged.

As with other components, several versions may exist depending on the production series.

Recoil starter and starting system

The recoil starter is used every time the engine is started. Its rope, return spring and internal mechanism are therefore subject to regular wear.

A faulty recoil starter may show symptoms such as:

• Broken rope.

• Rope no longer retracting.

• Mechanism spinning freely.

• Starter jamming.

• Starter no longer turning the engine.

If the recoil starter turns the engine normally but the engine does not start, the problem should be investigated elsewhere, particularly in the ignition system, carburettor or fuel supply.

Spark plug and ignition coil

The spark plug is a routine maintenance component on a petrol engine. A dirty or heavily worn spark plug can make starting difficult and cause irregular operation.

The ignition coil helps generate the spark required for engine operation.

If there is no spark, it may be one of the components that needs to be checked. However, it is preferable to inspect the complete ignition system before replacing the coil.

Batteries and electric start on MS173-51E, MS173-51SE and TT173-51E

The MS173-51E, MS173-51SE and Woodster TT173-51E versions may feature electric starting, requiring a battery and, depending on the version, a suitable charger.

Several generations of batteries may have been used during production.

Compatibility may depend on:

• Voltage.

• Connector type.

• Battery shape.

• Manufacturing period.

• Exact lawn mower version.

It is therefore essential to check the original part number and the list of compatible machines before ordering a battery or charger.

Cables and handlebar controls

The lawn mowers in this range use various Bowden cables to transmit commands from the handlebar to the corresponding mechanisms.

These may include:

• Drive cable.

• Throttle cable.

• Brake cable.

• Other control cables.

Over time, a cable may:

• Stretch.

• Become loose.

• Seize.

• Fray.

• Break.

• Develop a damaged outer sheath.

Cable length and fixing points may vary depending on the version. It is therefore important to compare the exact part number before ordering.

Mulching and side discharge

Depending on their equipment, MS173-51 lawn mowers may offer several operating modes: collection, discharge and mulching.

Associated components may include:

• Mulching cover.

• Side discharge deflector.

• Springs.

• Axles.

• Fixing components.

These parts may become damaged through impacts, repeated handling or normal ageing.

As with other components, their shape and mounting system may vary depending on the production series.

Grass collector and related parts

The grass collector is handled frequently and may wear over time.

Depending on the machine version, it may be possible to replace:

• Grass collector bag.

• Cover.

• Frame.

• Support.

• Fixing components.

Replacing only the damaged component allows the remaining parts of the collector to be reused when they are still in good condition.

Engine parts for MS173-51 and TT173-51

In addition to routine maintenance parts, various engine components may be available for more extensive repairs:

• Carburettor.

• Gaskets.

• Air filter.

• Ignition coil.

• Fuel tank.

• Fuel hoses.

• Exhaust.

• Exhaust gaskets.

• Internal engine parts.

• Other mechanical components.

These parts can help extend the service life of the lawn mower once the fault has been clearly identified.

For engine components, checking the production series is particularly important.

Pay attention to the different versions and production series

The Scheppach MS173-51, MS173-51E, MS173-51SE, MS173-51 Plus and Woodster TT173-51 / TT173-51E were produced in several different versions.

Some parts may therefore vary depending on:

• Exact model.

• Month of manufacture.

• Year of manufacture.

• Serial number.

• Machine reference.

• Engine version.

• Part number shown on the exploded parts diagram.

A part that looks visually similar may have different dimensions, mounting points or technical specifications.

It is therefore strongly recommended not to order a part based only on the “MS173-51” model name.

How to choose the correct part for your lawn mower

Before ordering, we recommend checking:

• Exact machine designation.

• Rating plate.

• Serial number.

• Month and year of manufacture.

• Part number on the exploded parts diagram.

• Part number shown on the old component, when available.

• List of compatible models shown on the product page.

This is particularly important for blades, blade holders, drive belts, wheels, carburettors, filters, cables, recoil starters, batteries and transmission components.

Regular maintenance of your Scheppach MS173-51 or Woodster TT173-51

Regular maintenance helps preserve the performance of the machine and extend its service life.

It is particularly advisable to:

• Clean the cutting deck regularly.

• Remove accumulated grass.

• Check the condition of the blade.

• Inspect the blade holder after an impact.

• Check the drive belt.

• Check the operation of the self-propelled system.

• Inspect the wheels and drive gears.

• Clean or replace the air filter.

• Check the spark plug.

• Inspect the control cables.

• Monitor the condition of the fuel hoses.

• Regularly check the engine oil level.

• Inspect the grass collector.

• Replace heavily worn parts before they damage other components.

Repair your Scheppach or Woodster lawn mower with the correct parts

A damaged blade, worn drive belt, broken cable, damaged wheel, faulty carburettor or starting problem does not necessarily mean that the complete lawn mower needs to be replaced.

By choosing the part that exactly matches your model and production series, you can extend the service life of your Scheppach MS173-51, MS173-51E, MS173-51SE, MS173-51 Plus or Woodster TT173-51 / TT173-51E.

Browse this category to find replacement parts for the cutting system, self-propelled drive, engine, wheels, starting system, ignition, mulching system, grass collection and controls.