MM92 - Uncategorized Maruyama - Free user manual and instructions

Product Type	Backpack Mist Blower
Brand	Maruyama
Model	MM92
Dimensions (L x W x H)	375 x 480 x 635 mm (14.8 x 18.9 x 25.0 in)
Dry Weight	11.7 kg (25.8 lbs)
Engine Type	2-Stroke Air-cooled CE800 (EPA compliant)
Engine Displacement	79.2 mL
Ignition System	Electric solid state
Carburetor Type	All position diaphragm
Fuel Tank Capacity	0.53 gal (2.0 L)
Recommended Fuel	Unleaded gasoline (85+ octane) mixed with oil at 50:1 ratio
Recommended Oil	Maruyama 50:1 2-stroke oil or quality 2-stroke oil for air-cooled engines
Discharge Volume Settings	0 (off), 1 (1.8 L/min), 2 (2.5 L/min), 3 (3.1 L/min), 4 (3.7 L/min)
Chemical Tank	Integrated tank with mist dial adjustment
Starting Method	Recoil starter with choke and throttle control
Stopping Method	Stop button (hold until engine stops)
Idle Speed Adjustment	User-adjustable; carburetor adjustments by dealer only
Safety Features	Warning labels, throttle interlock, no spark while servicing (remove plug cap)
Required Protective Gear	Hat, safety glasses, ear plugs, long pants, long-sleeved shirt, substantial footwear
Air Filter Maintenance	Clean each use or more often in dust; replace every 100 hours
Spark Plug Gap	0.024-0.028 in (0.6-0.7 mm)
Assembly Required	Yes; flexible pipe, bent pipe, straight pipe, clamps, mist hose
Warranty Note	Use correct fuel/oil ratio to avoid voiding warranty

Frequently Asked Questions - MM92 Maruyama

What type of fuel does the Maruyama MM92 require?

The MM92 requires a mixture of unleaded gasoline (85+ octane) and 2-stroke oil at a 50:1 ratio. Use Maruyama 50:1 oil or equivalent quality oil for air-cooled engines. Do not use automotive oil or NMMA/BIA certified oils.

How do I start the Maruyama MM92 mist blower?

1. Set the mist dial to '0'. 2. Pour chemical into tank (if using). 3. Move choke lever fully upward. 4. Set throttle to 1/2 speed. 5. Press down the lid and hold the frame with your foot. 6. Pull the starter grip briskly. After starting, slowly move choke lever downward to open position and allow engine to warm up at less than 1/2 speed.

How do I adjust the discharge volume?

Turn the mist dial to the desired number: 0 (off), 1 (1.8 L/min), 2 (2.5 L/min), 3 (3.1 L/min), 4 (3.7 L/min). The volume increases with the number.

What maintenance is required after every use?

Check and replenish fuel, check for fuel leaks, check bolts/nuts/screws for tightness, clean air filter element, and remove dust from air intake guard and cylinder fins.

How do I clean the air filter?

Move choke lever to closed position. Loosen knob and remove air cleaner cover. Remove foam filter and air filter. Clean foam filter by gently tapping or using a suitable solvent, then dry completely. Clean air filter by gently tapping. Replace if damaged. Reassemble in reverse order.

What is the correct spark plug gap and torque?

The electrode gap should be 0.024-0.028 in (0.6-0.7 mm). Tightening torque is 95-148 in. lbs (10.7-16.6 N·m). Do not over tighten.

How do I store the MM92 for long periods?

Perform all regular maintenance. Empty fuel tank. Disconnect fuel line, start engine until it stops. Remove spark plug, add a small amount of oil into cylinder, pull starter cord slowly to distribute oil, reinstall spark plug. Apply oil to metal surfaces and store in a dry place.

Can I use gasoline with ethanol in the MM92?

Do not use methanol, gasoline containing methanol, or gasohol with more than 10% ethanol. Use clean, fresh unleaded gasoline with 85+ octane. Premium fuel is not necessary. Use fuel stabilizer if storing.

What should I do if the engine vibrates abnormally?

Stop the engine immediately and check for the cause. Vibration is a warning of trouble. Inspect all fasteners and components. If problem persists, contact an authorized Maruyama dealer.

How do I stop the engine properly?

Turn the mist dial to '0' to stop spraying. Allow engine to idle for a few minutes to cool. Then press and hold the stop button until the engine completely stops. Never close the choke to stop the engine.

USER MANUAL MM92 Maruyama

Technical line drawing of a mechanical device with internal components (no text or symbols)

TABLE OF CONTENTS

FOREWORD	1	OPERATING INSTRUCTIONS	6
Warning label	1	MAINTENANCE	8
ASSEMBLY INSTRUCTIONS	3	STORAGE	10
BEFORE OPERATION	4	SPECIFICATIONS	11

FOREWORD

This Owner's/Operator's Manual is designed to familiarize the operator with the various features and component parts of the equipment and to assist you with the assembly, operation and maintenance of your new Mister.

It is essential that any operator of this Mister product reads and understands the contents of this manual before using the Mister.

Important safety instructions will be identified by the following safety symbol:

Failure to comply with the instructions in this manual may result in serious injury or death.

For additional assistance, contact any local authorized Maruyama dealer or Maruyama U.S., Inc., 4770 Mercantile Drive, Suite100, Fort Worth, TX 76137 U.S.A.

MANUAL SAFETY SYMBOLS

Throughout this manual and on the product itself, you will find safety alerts and helpful, information message preceded by symbols or key words. The following is an explanation of those symbols and key words and what they mean to you.

This symbol accompanied by the words WARNING and DANGER calls attention to an act or condition that can lead to serious personal injury to operator and bystanders.

Warning label

· Always remove dirt or mud to make the indications legible.
- The following alarm labels are attached.

Read Owner's/Operator's Manual thoroughly.

Make sure you read the Owner's/Operator's Manual thoroughly prior to use.

Prohibition of fire

Don't put a naked flame close to a place where supplying fuel or doing maintenance.

Wear protective gear.

Wear protectors such as hat, safety glasses, ear plugs during work.

Cautions for exhaust gas.

Take care not to breathe in exhaust gas from the engine.

Cautions for high temperatures

Muffler of engine, fin of cylinder, etc. are at high temperatures. Don't touch them.

WARNING

1. Read and understand this Owner's/Operator's Manual before using the this product. Be thoroughly familiar with the proper use of the this product.

2. Never allow children to operate this product. It is not a toy. Never allow adults to operate the unit without first reading the Owner's / Operator's Manual.

3. Become familiar with the controls and know how to stop the engine quickly.

4. Always use eye protection and hearing protection.

5. Keep the area of operation clear of all persons, particularly small children and pets.

6. Do not point the pipe in the direction of people or pets.

7. Never operate a product when you are fatigued, sickness, intoxicated, and pregnant.

8. Never operate a product without proper guards or other protective safety devices in place.

9. Dress properly; do not wear loose clothing or jewelry that can be caught in moving parts. Always wear substantial footwear, long pant, and long sleeved shirt.

10. Gasoline is highly flammable; handle it carefully.

A. Do not smoke while handling gasoline.
B. Use an approved fuel container for storing the gasoline/oil mixture.
C. Do not fill the fuel tank when the engine is hot or running
D. Fill the fuel tank outdoors and only up to one-half inch from the top of the tank. Do not fill the filler neck.
E. Wipe away any spilled gasoline before starting the engine.

1. Always be sure of your footing; keep a firm hold of the blower pipes, and walk, never run while operating a mist blower.
2. Use the correct accessories. Do not use the product for any job except that for which it is intended.
3. Keep all fasteners tight and be sure the Mist Blower is in safe working condition. Follow the maintenance instructions provided on page 8 - 10 of this manual.
4. Do not put hands or feet near or under the rotating parts. Keep clear at all times.
5. If this product should start to vibrate abnormally, stop the engine immediately and check for the cause. Vibration is generally a warning of trouble.
6. Avoid using this product near rocks, gravel, stones and similar matter in order to avoid dangerous flying debris.
7. Use this product only in daylight or good artificial light.
8. Do not allow bystanders in work area.
9. Do not operate without guard(s) in place.
10. Do not operate in unventilated area.
11. To reduce the risk of injury associated with the inhalation of dust, use a face filter mask in dusty conditions.
12. To reduce the risk of injury associated with contacting rotating part, stop the engine before installing or removing attachments.
13. To reduce the risk of fire and burn injury: -Move at least 10ft (3m) away from the fueling point before starting engine. -Always store gasoline in approved container.

Operating techniques

A. Operate power equipment only at reasonable hours - not early in the morning or late at night when people might be disturbed. Comply with times listed in local ordinances. Usual recommendations are 9:00 am. to 5:00 p.m., Monday through Saturday.

B. To reduce noise levels, limit the number of pieces of equipment used at any one time.

C. To reduce noise levels, operate this product at the lowest possible throttle speed to do the job.

D. Check your equipment before operation, especially the muffler, air intakes, and air filters.

E. Use rakes and brooms to loosen debris before blowing.

F. In dusty conditions, slightly dampen surfaces when water is available.

G. Conserve water by using this product instead of hoses for many lawn and garden applications, including areas such as gutters, screens, patios, grills, porches, and gardens.

H. Watch out for children, pets, open windows, or freshly washed cars, and blow debris safely away.

1. Use the full blower nozzle extension so the air stream can work close to the ground.

J. After using this product and other equipment, CLEAN UP! Dispose of debris in trash receptacles.

ASSEMBLY INSTRUCTIONS

STEP #1) Locate and identify all the components (see sketch).

STEP #2) With a flat head screwdriver, use a CLAMP(L) to connect the FLEXIBLE PIPE to the BENT PIPE.
Next, using a CLAMP(S), insert the swivel pipe completely into the flexible pipe. Tighten with screwdriver. Then put the band on the seams.

STEP #3) Assemble the STRAIGHT PIPE to the swivel pipe (see sketch).

STEP #4) Connect the Mist hose to the Mist Dial and Chemical tank. (see sketch)

BEFORE OPERATION

Be sure the Mister is correctly assembled and all fasteners and fittings are properly secured.

THROTTLE LEVER

The lowest position of lever is "IDLE" setting, and the highest position is the "FULL THROTTLE" setting.

CAUTION!

1.Shutting Engine Off

Before shutting the engine off, allow it to idle for a short while.

• Never stop the engine by closing the choke.
• Never stop the engine during operation while running above idle speed.

2. Transporting and Storage

• Shut off the engine and allow it to cool before transporting or storing the unit.
• Do not put the unit on dry grass or near any flammable object unless the engine is cold or cooled down.

Chemicals

• Read the labels of chemicals to be used carefully and understand the method of use and cautions.
  Use the chemicals directly after opening the package. Chemicals left for a long time after the package is open may cause poor discharging due to moisture absorption.
• Mistaking the discharge quantity re category of chemicals may cause damage.
• Do not leave the chemicals in the chemical tank for a long time. The machine might malfunction.
• Store chemicals in a safe place, and be careful not to break open their containers during transportation.
• Treat chemical containers to ensure safety.
• Dispose the used chemical or fertilizer bags in a manner that will not cause injury.
• Pay attention to the handling of chemicals and fertilizer. If a chemical enters into eye or mouth, wash it off with water immediately. If you feel ill, see a doctor immediately.
• According to wind direction, change the discharging method to protect workers and houses. When discharging chemicals, work from upwind to downwind. Also give consideration to prevent chemicals from drifting or scattering on crops, enclosures, fish-breeding ponds, and houses nearby.
• When preparing chemicals, prepare the necessary amount only in accordance with the established spraying plan. If too much chemicals are left over, action is difficult.

RECOMMENDED FUEL TYPE

Use clean, fresh lead-free gasoline, including oxygenated or reformulated gasoline, with an octane rating of 85 or higher. To ensure freshness, purchase only the quantity of gasoline that can be used in 30 days. Use of lead-free gasoline results in fewer combustion chamber deposits and longer spark plug life. Use of premium grade fuel is not necessary or recommended.

CAUTION!

IMPORTANT: Never use methanol, gasoline containing methanol, gasohol containing more than 10% ethanol, premium gasoline, or white gas because engine fuel system damage could result.

Do not use fuel additives other than those manufactured for fuel stabilization during storage such as MARUYAMA's stabilizer/conditioner or a similar product.

MARUYAMA's stabilizer/conditioner is a petroleum distillate based conditioner/stabilizer.

MARUYAMA does not recommend stabilizers with an alcohol base such as ethanol, methanol or isopropyl. Additives should not be used to try to enhance the power or performance of machine.

FUEL: MIXING GASOLINE AND OIL

CAUTION! The engine used on this Mist blower is of a 2-stroke design. The internal moving parts of the engine, i.e., crankshaft bearings, piston pin bearings and piston to cylinder wall contact surfaces, require oil mixed with the gasoline for lubrication. Failure to add oil to the gasoline or failure to mix oil with the gasoline at the appropriate ratio will cause major engine damage which will void your warranty. For your fuel premix, only use Maruyama 50:1 2-Stroke Oil or quality oil designed for 2-stroke air-cooled engine.

WARNING

Gasoline is extremely flammable and can be explosive under certain conditions.

Turn the engine switch OFF. Do not smoke. Make sure the area is well ventilated and free from any source of flame of sparks: this includes any appliance with a pilot light.

FUEL MIXTURE: When using genuine Maruyama 50:1 2-Stroke Oil, or a quality oil designed for 2- stroke air-cooled engines, oil ratio is 50 parts gasoline to 1 part oil or 50:1.

CAUTION! If Maruyama brand oil is not used, never use a mixing ratio less than 50:1 regardless of the oil package mixing instructions.

Ratios less the 50:1, (for example, 60:1, 80:1, 100:1), reduce the amount of lubrication to the internal moving parts of the engine and can cause damage.

Gasoline	50:1 two-stroke oil
1 gallon	2.6 oz.
2 gallons	5.1 oz.
5 gallons	12.8 oz.

1 liter	20mL
5 liters	100mL

MIXING INSTRUCTIONS: Always mix fuel and oil in a clean container approved for gasoline. Mark the container to identify it as fuel mix for the Mist Blower. Use regular unleaded gasoline and fill the container with half the required amount of gasoline. Pour the correct amount of oil into the container then add the remaining amount of gasoline. Close the container tightly and shake it momentarily to evenly mix the oil and the gasoline before filling the fuel tank on the Mist Blower.

graph LR
    A["FILL MARK"] --> B["GAS"]
    B --> C["OIL"]
    C --> D["ADD OIL"]
    D --> E["GAS"]
    E --> F["ADD REMAINING GASOLINE"]
    F --> G["SHAKE (MIX OIL AND GASOLINE)"]

When refilling the Mist Blower fuel tank, clean around the fuel tank cap to prevent dirt and debris for entering the tank during cap removal. Always shake the premix fuel container momentarily before filling the fuel tank.

Always use a spout or funnel when fueling to reduce fuel spillage. Only fill the tank to within 1/2 inch from the top of the tank. Avoid filing to the top of the tank filler neck.

NOTE:

1. Never mix gasoline and oil directly in the Mist Blower fuel tank.

CAUTION!

1. Do not use National Marine Manufacturer's Association (NMMA) or BIA certified oils. This type or 2-stroke engine oil does not have the proper additives for air-cooled, 2-stroke engines and can cause engine damage.
2. Do not use automotive motor oil. This type of oil does not have the proper additives for air-cooled, 2-stroke engines and can cause engine damage.

OPERATING INSTRUCTIONS

STARTING PROCEDURE

STEP #1)

Move the "MIST DIAL" to the "0" position.

Close-up of a metallic mechanical component with a circular hole and arrow indicator (no readable text or symbols)

STEP #2)

Pour chemical into the chemical tank.

STEP #3)

Close the lib tightly.

STEP #4)

Move the "CHOKE LEVER" fully upward to the closed position. If the engine is already warm, only a partial or open (no choke) choke setting may be required.

STEP #5)

Move the "CHOKE LEVER" fully upward to the closed position. If the engine is already warm, only a partial or open (no choke) choke setting may be required.

STEP #6)

Set the THROTTLE LEVER at 1/2 speed.

STEP #7)

Press down the "LID" and hold the "FRAME" with your right foot gently.

Pull the "STARTER GRIP" briskly to start the engine.

NOTE: Only short pulls are necessary. Never pull the starter cord to its fullest extension. Never let go of the starter grip until it is at the fully returned position.

STEP #8)

Warming up the engine.

When the engine has started, slowly move the "CHOKE LEVER" fully downward to the open position.

Allow the engine to "WARM-UP" at less than 1/2 speed.

If a MARUYAMA engine fails to start after following the above procedures, contact an authorized MARUYAMA dealer.

OPERATION

When the engine has warmed-up, the mist blower can be positioned on the back of the operator.

When the mist blower is positioned and ready for operation, adjust the throttle to a speed required to accomplish the task.

CAUTION

• Avoid using too dense hydrate solution.
• Avoid using highly flammable solutions such as gasoline.

WARNING

• Never operate a mist blower when you are fatigued.
• Never operate a mist blower without proper guards or other protective safety devices in place.

WARNING

To prevent overheating and engine seizure, cooling air comes from the intake grille of the fan housing and is pushed by the blower fan through an opening in the fan housing over the cylinder fin area, taking away combustion heat. The grille and cylinder fins must be kept clean of grass, dust and any debris. Engine failure due to lack of this "Normal Maintenance" is not covered by warranty.

Adjustment of discharging volume

• Coincide the number on the dial of volume switch with the market.
• Discharging volume will increase accordingly as the number increases.

Discharging volume

STOPPING THE ENGINE

Move the "dial" to the "0" position, and stop spraying.

Always run the engine at idle speed for a few minutes to allow cooling before stopping. To stop the engine, press and hold the STOP BUTTON until engine completely stops.

CLEANING THE PRODUCTS

Remove Mist hose from MIST DIAL, and discharge chemical from chemical tank. After recovering the remnant chemical, clean the inside chemical tank using clean water.

ADJUSTMENT

IDLING SPEED ADJUSTMENT

1. Idle speed is the only available adjustment.
2. Do not tamper with the carburetor setting to increase the maximum engine speed.
3. If adjustment is needed, have it performed by your authorized MARUYAMA service dealer.

Carburetor adjustments are made at the factory and are not adjustable without disassembling the carburetor.

MAINTENANCE

Before each use, the mist blower should be inspected for proper assembly and fitness of all components. All fasteners should be checked for correct tightness. Always inspect for fuel leaks.

WARNING

Do not attempt to start or operate a mist blower Blower with a fuel leak.

Maintenance Period

WARNING

Always remove the spark plug cap from spark plug when servicing the engine to prevent accidental starting.

	Maintenance Daily		Every 20 hours	Every 50 hours	Every 100 hours
	Check and replenish fuel	●
	Check for fuel leakage	●
	Check bolts, nuts and screws for tightness or missing	●
	Check engine idle speed adjustment	●
■	Clean air filter element	●
	Check spark plug	●
■	Check and clean fuel filter	●
■	Remove dust and dirt from air intake guard	●
	Tighten bolts and nuts	●
	Clean spark plug and adjust electrode gap	●
■	Remove dust and dirt from cylinder fins	●
●	Remove carbon deposits in exhaust port	●
	Replace air filter	●
	Replace fuel filter	●
	Replace spark plug	●
●	Remove carbon deposits on piston head and combustion chamber	●
●	Check the sliding portion of crankshaft, connecting rod etc.	●
	Replace fuel tube, fuel tank cap gasket It is recommended to replace every 3 years

●: Service to be performed by an authorized Maruyama engine dealer.
■: Service more frequently under dusty conditions.

Note:

The service intervals indicated are to be used as a guide.

Service to be performed more frequently as necessary depending on operating condition.

Use Maruyama standard 50:1 2-stroke engine oil.

AIR FILTER

Maintenance Interval

• The air filter should be cleaned and inspected each time the mist blower is used, or more often when working in extremely dusty conditions.
• Replace after every 100 hours of operation.

Air Filter Cleaning

Move the choke lever to the closed (⊥) position.

1. Loosen the knob and remove the air cleaner cover.
2. Remove the FOAM FILTER and AIR FILTER from the air cleaner body.
3. Clean the filter.

· FOAM FILTER

Clean FOAM FILTER by gently tapping or cleaning with a suitable solvent the filter. Then completely dry before using again.

· AIR FILTER

Clean AIR FILTER by gently tapping.

Replace filter if it is damaged or very dirty.

1. Reassemble components in reverse order.
2. Reinstall the air cleaner cover and tighten the knob.

FUEL FILTER

Maintenance Interval

• The fuel filter should be cleaned and inspected for damage after each 20 hours of operation.
• The fuel filter should be replaced after every 100 hours of operation.

Fuel Filter Replacement

The fuel filter is attached to the end of the fuel pick-up hose inside the fuel tank.

To replace the fuel filter:

1. Make sure the fuel tank is empty.
2. Remove the fuel cap.
3. Using a wire hook, gently pull the fuel filter out through the fuel filler opening.
4. Grasp the fuel hose next to the fuel filter fitting and remove the filter, but do not release the hose.
5. While still holding on to the fuel hose, attach the new fuel filter.
6. Drop the new fuel filter back into the fuel tank.
7. Make sure that the fuel filter is not stuck in a corner of the tank, and that the fuel hose is not doubled over (kinked) before refueling.

SPARK PLUG

Maintenance Interval

• The spark plug should be removed from the engine and checked after each 20 hours of operation.
• Replace the spark plug after every 100 hours of operation.

Spark Plug Maintenance

1. With the engine at ambient (room) temperature, twist the high tension lead boot on the spark plug back and forth a couple of times to loosen the boot, then pull the boot off of the spark plug.
2. Remove the spark plug.
3. Clean the electrodes with a stiff brush.

1. Adjust the electrode air gap to .024-.028 in (0.6- 0.7 mm).
2. Replace the spark plug if it is oil-fouled, damaged, or if the electrodes are worn down.
3. Do not over tighten the spark plug when installing. The tightening torque is 95-148 in. lbs. (10.7-16.6 N·m).

COOLING FINS

Maintenance Interval

The cylinder cooling fins should be cleaned after every 50 hours of operation, or once a week, whichever comes first. Air must flow freely around and through the cylinder cooling fins to prevent engine overheating. Leaves, grass, dirt and debris buildup on the fins will increase the operating temperature of the engine, which can reduce engine performance and shorten engine life.

Cooling Fin Cleaning

1. With the engine at ambient (room) temperature, remove the four screws retaining the top cover, then remove the top cover.

2. Clean all dirt and debris from the cooling fins and from around the cylinder base.

3. Reinstall the top cover and tighten the knob. Be sure to attach the grommet.

MUFFLER AND EXHAUST PORTS

Maintenance Interval

The muffler should be inspected and cleaned after each 50 hours of use.

Muffler Maintenance

The muffler should be removed and serviced after each one fifty (50) hours of use. At the same time, the exhaust ports should be cleaned and inspected. An AUTHORIZED MARUYAMA DEALER should be contacted for this service.

GENERAL CLEANING AND TIGHTENING

WARNING

POTENTIAL HAZARD

- When engine is running, fan is rotating and other parts are moving.

WHAT CAN HAPPEN

- Contact with rotating fan or other moving parts could cause serious personal injury or death.

HOW TO AVOID THE HAZARD

• Always turn off your Backpack Blower before you clean or perform any maintenance on it.

The MARUYAMA Backpack Blower will provide maximum performance for many hours, if it is maintained properly. Good maintenance includes regular checking of all fasteners for correct tightness, and cleaning the entire machine. Contact an authorized MARUYAMA dealer for additional maintenance suggestions.

STORAGE

For long-term storage of the mist blower, first perform all regular maintenance procedures and needed repairs. Empty the fuel tank. Disconnect the fuel supply line from the carburetor and depress the primer bulb until fuel stops discharging from the fuel-return line.

Start the engine and allow it to run until it stops. Pull the starter cord a few times to remove any excess fuel from the engine. Remove the spark plug and insert a small amount of oil into the cylinder. Slowly pull the starter cord and bring the piston to a position closest to the spark plug hole. Re-install the spark plug. Apply a thin coating of oil to all the metal surfaces and store the mist blower in a dry place.

SPECIFICATIONS

Models MM92-V
Dimensions L x W x H 375 x 480 x	635 mm (14.8 x 18.9 x 25.0 in.)
Dry Weight 11.7 kg (25.8 lbs)
Engine Type Maruyama/2-Stroke Air cooled CE800 for EPA
Displacement 79.2 mL
Ignition System Electric solid state
Carburetor All position diaphragm
Fuel Tank Capacity 0.53gal (2.0 L)
Fuel Mixture	50:1Using MARUYAMA 50:1 2-stroke Engine Oil or any quality 2-stroke engine oil designed for use in air-cooled, high performance 2-stroke engines.

INDICE

Close-up of a metallic mechanical component with a central hole and threaded end, showing no visible text or symbols.

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