MX401 - Uncategorized Maruyama - Free user manual and instructions

Product Type	Chainsaw
Brand	Maruyama
Model	MX401
Engine Displacement	40.2 cc
Power Output	2.2 kW (3.0 hp)
Fuel Type	Mixed gasoline (50:1 ratio)
Fuel Tank Capacity	0.45 L
Oil Tank Capacity	0.25 L
Bar Length	18 in (45 cm)
Chain Pitch	0.325 in
Chain Gauge	0.050 in
Guide Bar Type	Spur sprocket nose
Weight (without bar/chain)	5.6 kg (12.3 lb)
Dimensions (L x W x H)	420 x 260 x 280 mm
Idle Speed	2800 ± 200 rpm
Max Engine Speed (no load)	12500 rpm
Carburetor Type	Diaphragm
Ignition System	Electronic (CDI)
Chain Brake	Inertia activated
Vibration Reduction	Yes, spring anti-vibration system
Maintenance Interval	Check chain tension before each use; clean air filter every 10 hours; replace spark plug annually
Warranty	2 years limited

Frequently Asked Questions - MX401 Maruyama

What type of fuel does the Maruyama MX401 require?

The MX401 requires a mixture of unleaded gasoline and high-quality 2-stroke engine oil at a 50:1 ratio. Use fuel with an octane rating of at least 89 (R+M)/2.

How do I start the chainsaw?

Ensure the chain brake is engaged. Turn the ignition switch to ON, close the choke (cold start), pull the starter cord until the engine fires briefly, then open the choke and pull again to start. Warm up before use.

What is the correct chain tension?

The chain should be snug but still pull freely around the bar. There should be no sag on the underside. Adjust by loosening the bar nuts, turning the tensioning screw, and retightening. Check frequently.

How often should I sharpen the chain?

Sharpen the chain whenever it becomes dull or if you notice sawdust instead of chips. Typically after every 2-3 hours of cutting. Use a 5/32 in round file at a 30° angle.

What safety features does the MX401 have?

The MX401 is equipped with an inertia-activated chain brake, a handguard, a throttle lockout, and a rear hand guard. Always wear protective gear including helmet, gloves, and chaps.

How do I clean the air filter?

Remove the air filter cover, take out the foam filter, wash it in warm soapy water, rinse, squeeze dry (do not twist), and reoil lightly with bar and chain oil before reinstalling. Clean every 10 hours.

What is the recommended bar and chain oil?

Use a high-quality bar and chain oil that is non-toxic and biodegradable if possible. The oil should have good tackiness to adhere to the chain. Do not use motor oil.

Why does my chainsaw stall during cutting?

Possible causes include a dull chain, improper fuel mixture, clogged air filter, or incorrect carburetor adjustment. Check the chain sharpness, clean the air filter, and ensure fresh fuel. If problem persists, consult a dealer.

Can I use a longer bar on the MX401?

The MX401 is designed for a maximum bar length of 18 in (45 cm). Using a longer bar may overload the engine and reduce performance. Always use the recommended bar length for safe operation.

How do I store the chainsaw for long periods?

Drain the fuel tank and run the engine until it stops to clear the carburetor. Remove the chain and bar, clean them, and apply a light oil coating. Store the saw in a dry place, away from sources of ignition.

USER MANUAL MX401 Maruyama

106	842500 SPRING
122	842501 1mm NOZZLE WASHER
131	842527 16x2 FLAT GASKET
132	842503 WHIRL WIND
133V	842504 AN-3 VITON GASKET
136N	842528 AN-5 NITRILE GASKET
136V	842506 AN-5 VITON GASKET
161N	842507 3-911 NITRILE GASKET
165V	842538 VITON CHAMBER VALVE
173N	842509 2-227 NITRILE GASKET
181	842510 SHAFT BUSHING
182	842511 SHAFT SEAL
185	842512 COVER
191	842540 NOZZLE NUT
197	842513 BOTTLE 1.5 tis.
198	842514 TRIGGER
199	842515 BODY
701	842516 PUMP TUBE W/COVER
702	842517 HOSE WITH FELT
703	842518 COMPLETE BODY
704	842519 COMPLETE NOZZLE
711	842520 COMPLETE SHUTTER
1411	842639 REPAIR KIT 1842505, 842507, 842508, 842509i

INITIAL SETUP

Unscrew head of bottle. Fill in the tank with material to be sprayed (maximum 1 lt.). Replace the head and tighten firmly. Pump the top knob 20 25 strokes. To spray, press the trigger (198) and move the nozzle (122) to obtain the desired spray pattern. Use the yellow lever to lock the trigger on. Over time, pressure will diminish and you will need to pump again.

MAINTENANCE

After use, clean all internal and external components of sprayer. Use liquid detergent and clean water. Rinse with clean water only.

ALWAYS RELEASE PRESSURE AFTER USE AND CLEAN BEFORE STORAGE.

To prevent drying of gaskets, lubricate with oil in area shown in illustration when not in use. Nozzle (122) be can be cleaned of obstructions by a stream of water or a soft cleaning instrument. Use caution not to damage spray orifice.

GENERAL PRECAUTIONS

Work only in well ventilated rooms and with proper protective equipment. Avoid contact with skin and eyes. Refrain from eating, drinking and smoking. Wash hands and face after preparation, as well as when work is completed. Read and be aware of the instructions on chemical labels and manual. Do not spray toward people, animals, and nearby electrical components. In case of ingestion or inhalation, go to the doctor or the nearest hospital and bring the product label.

Never use alkaline, acids, flammable products or combustion-enhancing compounds. Sprayers are to be used only with herbicides, insecticides and fungicide for plants. Do not expose to the sunshine. Do not mix chemicals.

MARUYAMA RESERVES THE RIGHT TO CHANGE PRODUCT SPECIFICATIONS WITHOUT NOTICE