Mountfield Petrol Chainsaw - MC3720
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Product Information
Full details
The Mountfield MC3720 petrol chainsaw is designed for homeowners and garden enthusiasts needing a reliable tool for felling small trees, limbing, bucking, and pruning. Its key benefit is the powerful 37.2cc engine combined with an excellent power-to-weight ratio, ensuring efficient cutting for demanding tasks. A potential caveat is that like all petrol chainsaws, it requires regular maintenance and proper fuel mixture. This guide will help you understand its features, use it effectively, and keep it in optimal condition.
All features
| Model Part Number | MC3720 |
|---|---|
| Brand | Mountfield |
Extended Product Information
FAQs
What is the correct fuel mixture for the MC3720?
Always refer to your owner's manual for the precise fuel-to-oil ratio. Typically, it's a 40:1 ratio for modern 2-stroke engines, meaning 40 parts petrol to 1 part 2-stroke oil.
How often should I sharpen the chainsaw chain?
The frequency depends on usage and the type of wood cut. A good rule of thumb is to sharpen the chain every time you refuel, or when you notice a significant drop in cutting performance.
What is the warranty period for this chainsaw?
Warranty information typically varies by region and retailer. Please consult your product documentation or the retailer where you purchased the MC3720 for specific warranty details.
Can I use this chainsaw for professional logging?
The Mountfield MC3720 is designed for domestic and garden tasks. For professional logging operations, a more powerful and heavy-duty chainsaw would be recommended.
How do I adjust the chain tension?
The MC3720 features a side-position chain tensioner. Loosen the bar nuts slightly, use the tensioning screw to adjust the chain so it is snug but can still be rotated by hand, then re-tighten the bar nuts.
What maintenance is required for the air filter?
The air filter should be checked and cleaned regularly, especially in dusty conditions. Remove the filter cover, gently tap out dust, or wash it with soapy water if heavily soiled. Ensure it is completely dry before reinstalling.
Troubleshooting
Chainsaw will not start
Check fuel level and ensure correct fuel/oil mixture. Ensure the chain brake is disengaged. Verify the spark plug is clean and correctly gapped. Use the primer bulb and choke appropriately for cold starts.
Engine runs but chain does not move
Check if the chain brake is engaged. Inspect the chain for damage or if it has come off the bar. Ensure the clutch is functioning correctly (if issues persist, professional service may be needed).
Poor cutting performance
Ensure the chain is sharp. Check chain tension – it should be snug but still pull freely by hand. Verify the chain oiler is working and the reservoir is full.
Excessive vibration
Ensure all nuts and bolts are tightened. Check the condition of the anti-vibration mountings. Ensure the chain is properly tensioned and sharp.
Pros and Cons
Pros
- Powerful engine for its size, suitable for various garden tasks.
- Lightweight and well-balanced for reduced user fatigue.
- Durable Oregon guide bar for reliable cutting.
- Convenient features like side chain tensioning and adjustable lubrication.
- Safety features enhance user protection.
Cons
- Requires mixing of petrol and oil for fuel.
- Petrol engines generally require more maintenance than electric alternatives.
- Noise levels can be higher compared to electric models.
- Chainsaw operation requires safety training and protective gear.
Setup, Compatibility & Care
Setup:
- Ensure you are wearing appropriate personal protective equipment (PPE).
- Mix the correct ratio of unleaded petrol and 2-stroke oil for the fuel.
- Fill the fuel tank and the chain oil reservoir.
- Engage the chain brake before starting.
- Use the primer pump until fuel is visible in the primer bulb.
- Pull the starter cord firmly.
- Once started, disengage the chain brake before use.
Compatibility:
- Uses standard 3/8" pitch, 0.050" gauge chainsaw chain.
- Compatible with standard 2-stroke engine oil designed for chainsaws.
Care:
- After Each Use: Clean the air filter, check chain tension, and clean debris from the bar and chain area.
- Regularly: Inspect the chain for sharpness and wear. Sharpen or replace as needed. Clean the spark plug and check its gap. Ensure the chain brake mechanism is functioning correctly.
- Fuel: Always use fresh fuel mixed to the manufacturer's recommended ratio. Do not store mixed fuel for extended periods.
- Chain Oil: Keep the chain oil reservoir filled to ensure proper lubrication.