1. Safety Information
Read and understand all safety warnings and instructions before operating this lawn mower. Failure to follow these instructions may result in serious injury or death.
1.1 General Safety Rules
- Always keep children and pets away from the mowing area.
- Never operate the mower when barefoot or wearing open sandals. Always wear substantial footwear.
- Thoroughly inspect the area where the equipment is to be used and remove all objects which can be thrown by the machine.
- Do not operate the mower in wet grass, as this can cause slipping and accidents.
- Always wear eye protection and hearing protection when operating the mower.
1.2 Fuel Safety
- Gasoline is highly flammable. Store fuel in approved containers in a cool, well-ventilated area.
- Never refuel the engine while it is running or hot. Allow the engine to cool before adding fuel.
- Do not smoke while handling fuel.
2. Product Overview
The Toyama TLM420RM-38 is a robust gasoline-powered lawn mower designed for efficient grass cutting with a collection system. Familiarize yourself with its components for safe operation.

Image 2.1: Overall view of the Toyama TLM420RM-38 gasoline lawn mower with grass collector attached.
2.1 Main Components
- Engine: 3.8 horsepower gasoline engine.
- Cutting Deck: Houses the cutting blade, providing a 42cm cutting width.
- Grass Collector: Detachable bag for collecting cut grass.
- Handlebar: Ergonomic handle for steering and control.
- Wheels: For mobility across the lawn.
- Blade Height Adjustment Lever: Mechanism to change cutting height.
3. Setup
Before first use, the lawn mower requires some assembly and preparation.
3.1 Handlebar Assembly
- Unfold the lower handlebar section and secure it to the mower deck using the provided bolts and nuts.
- Attach the upper handlebar section to the lower section, ensuring all cables are routed correctly and not pinched.
- Tighten all fasteners securely.
3.2 Grass Collector Assembly

Image 3.1: The lawn mower with its grass collector detached, ready for assembly or emptying.
- Assemble the grass collector frame and attach the fabric bag according to the instructions in the separate collector manual (if provided).
- Lift the rear discharge flap of the mower.
- Hook the grass collector onto the mower's rear housing. Ensure it is seated firmly to prevent grass from escaping.
3.3 Adding Fuel and Oil

Image 3.2: Close-up view of the engine, showing the fuel cap (red) and oil fill/dipstick (yellow).
- Engine Oil: Fill the engine with the recommended 4-stroke engine oil (e.g., SAE 30 or 10W-30) to the 'Full' mark on the dipstick. Do not overfill.
- Fuel: Fill the fuel tank with fresh, unleaded gasoline. Do not use E85 or other ethanol blends higher than E10. Leave space for fuel expansion.
3.4 Blade Height Adjustment
Adjust the cutting height using the lever located on the side of the mower deck. Select a height appropriate for your grass type and desired lawn appearance. Avoid cutting more than one-third of the grass blade length at a time.
4. Operating Instructions
Follow these steps for safe and effective operation of your lawn mower.
4.1 Pre-Operation Checklist
- Check engine oil level.
- Check fuel level.
- Ensure all nuts, bolts, and screws are tight.
- Inspect the blade for sharpness and damage.
- Clear the mowing area of any debris.
4.2 Starting the Engine
- Ensure the spark plug wire is securely attached.
- Move the throttle lever to the 'Choke' position (for cold starts) or 'Fast' position (for warm starts).
- Press the primer bulb 3-5 times (if equipped).
- Hold the engine brake lever against the handlebar.
- Pull the starter rope firmly until the engine starts.
- Once the engine starts, gradually move the throttle lever to the 'Fast' position.
4.3 Mowing Techniques
- Mow in overlapping rows for an even cut.
- For best results, mow when the grass is dry.
- Do not overload the engine by trying to cut too much grass at once.
- Always push the mower forward; do not pull it towards you.
4.4 Stopping the Engine
Release the engine brake lever to stop the engine. Wait for the blade to come to a complete stop before approaching the mower.
5. Maintenance
Regular maintenance ensures the longevity and optimal performance of your lawn mower.
5.1 Regular Cleaning
- After each use, clean grass clippings from the underside of the deck and around the engine.
- Disconnect the spark plug wire before cleaning the blade area.
- Do not use a pressure washer directly on the engine or electrical components.
5.2 Blade Inspection and Sharpening

Image 5.1: Underside view of the mower deck, highlighting the cutting blade and its mounting.
- Inspect the blade regularly for damage, dullness, or imbalance.
- A dull blade tears grass, leading to an unhealthy lawn. Sharpen or replace the blade as needed.
- Always wear heavy gloves when handling the blade.
5.3 Engine Oil Change
Change the engine oil after the first 5 hours of operation, then every 25-50 hours or annually, whichever comes first. Refer to the engine manual for specific instructions.
5.4 Air Filter Cleaning
Clean the air filter every 25 hours of operation or more frequently in dusty conditions. A dirty air filter can reduce engine performance.
5.5 Storage
For long-term storage, drain the fuel tank or add a fuel stabilizer. Clean the mower thoroughly and store it in a dry, protected area.
6. Troubleshooting
This section provides solutions to common operational issues.
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine will not start | No fuel, old fuel, spark plug issue, engine brake not engaged | Add fresh fuel, check spark plug, engage engine brake lever |
| Uneven cut | Dull or bent blade, uneven wheel height adjustment | Sharpen/replace blade, ensure all wheels are set to the same height |
| Excessive vibration | Bent or unbalanced blade, loose components | Inspect blade for damage, tighten all fasteners |
| Engine lacks power | Dirty air filter, old fuel, low oil level | Clean air filter, use fresh fuel, check/add oil |
7. Specifications
Technical details for the Toyama TLM420RM-38 lawn mower.
| Feature | Detail |
|---|---|
| Model Name | TLM420RM-38 |
| Brand | Toyama |
| Engine Power | 3.8 HP |
| Cutting Width | 42 cm |
| Power Source | Fuel-powered (Gasoline) |
| Material | High-strength steel |
| Weight | 13.8 kg |
| Color | Black |
8. Warranty and Support
This Toyama product is covered by a manufacturer's warranty against defects in materials and workmanship. The specific terms and duration of the warranty may vary by region and purchase date. Please retain your proof of purchase for warranty claims.
8.1 Warranty Claims
In the event of a warranty claim, please contact your authorized Toyama dealer or service center. Do not attempt to repair the product yourself, as this may void the warranty.
8.2 Technical Support
For technical assistance, spare parts, or service inquiries, please contact your local Toyama service representative. Contact information can typically be found on the Toyama official website or through your product retailer.





