Power Fist 420cc Manuale utente

V 4.4 8449019

Please read and understand all instructions before use. Retain this manual for

future reference.

420cc OHV Gas Engine

with Electric Start

User Manual

8449019 420cc OHV Gas Engine with Electric Start V 4.4

2 For technical questions call 1-800-665-8685

SPECIFICATIONS

Engine Displacement

420cc

Start Type

Pull/12V DC

Torque

19.54 ft-lb

Shaft Diameter

1 in.

Shaft Rotation (From PTO Shaft Side)

Counterclockwise

Shaft End Tapped [Diameter (in) / Threads Per Inch]

3/8 -24 UNF

Number of Cylinders 1

Cylinder Bore

3.5 in.

Stroke

2.6 in.

Compression Ratio

8.5:1

Cooling System

Air

Fuel Tank

Metal

Fuel Type

Gasoline

Fuel Tank Capacity

7 quarts (6.6 litres)

Fuel Filter

Yes

Oil Capacity

1.1 quarts (1 litre )

Lubrication System

Splash

Oil API Service Classification

SF or Newer

Low Oil Shutdown

Yes

Governor System

Mechanical

Ignition System

Transistorized Magneto

Max. Speed

3,600 RPM

Spark Plug (SKU 4780112)

Gap

0.028~0.03 in. (0.7~0.8 mm)

Torque

18~22 Nm

Air Cleaner Type

Foam

420cc OHV Gas Engine

with Electric Start

V 4.4 420cc OHV Gas Engine with Electric Start 8449019

Visit www.princessauto.com for more information 3

INTRODUCTION

The 420cc OHV gas engine is ideal for commercial or agricultural applications. The

engine has an overhead valve design and electronic ignition for easy starts,

increased power and better fuel economy. It meets all Environmental Protection

Agency (EPA) Guidelines.

Common applications are pressure washers, tillers/cultivators, log splitters, forestry

equipment, water pumps, lawn and garden equipment, agricultural equipment

and generators.

SAFETY

WARNING! Read and understand all instructions before using this engine. The

operator must follow basic precautions to reduce the risk of personal injury

and/or damage to the equipment.

Keep this manual for safety warnings, precautions, operating or inspection and

maintenance instructions.

HAZARD DEFINITIONS

Please familiarize yourself with the hazard notices found in this manual. A notice is

an alert that there is a possibility of property damage, injury or death if certain

instructions are not followed.

DANGER! This notice indicates an immediate and specific hazard that will

result in severe personal injury or death if the proper precautions

are not taken.

WARNING! This notice indicates a specific hazard or unsafe practice that could

result in severe personal injury or death if the proper precautions

are not taken.

CAUTION! This notice indicates a potentially hazardous situation that may result

in minor or moderate injury if proper practices are not taken.

NOTICE! This notice indicates that a specific hazard or unsafe practice will

result in equipment or property damage, but not personal injury.

8449019 420cc OHV Gas Engine with Electric Start V 4.4

4 For technical questions call 1-800-665-8685

WORK AREA

1. Operate in a safe work environment. Keep your work area clean, well lit and

free of distractions.

2. Keep anyone not wearing the appropriate safety equipment away from the

work area.

3. Store unused tools properly in a safe and dry location to prevent rust or

damage. Lock tools away and keep out of the reach of children.

4. Do not install or use the engine in the presence of flammable gases, dust

or liquids.

PERSONAL SAFETY

WARNING! Wear personal protective equipment approved by the Canadian

Standards Association (CSA) or American National Standards Institute (ANSI).

PERSONAL PROTECTIVE EQUIPMENT

1. Always wear impact safety goggles that provide front and side protection for

the eyes. Eye protection equipment should comply with CSA Z94.3-07 or ANSI

Z87.1 standards based on the type of work performed.

2. Wear gloves that provide protection based on the work materials or to reduce

the effects of tool vibration.

a. Do not wear gloves when operating a tool that can snag the material and

pull the hand into the tool.

3. Wear protective clothing designed for the work environment and tool.

4. Non-skid footwear is recommended to maintain footing and balance in the

work environment.

5. Wear steel toe footwear or steel toe caps to prevent a foot injury from

falling objects.

PERSONAL PRECAUTIONS

Control the tool, personal movement and the work environment to avoid personal

injury or damage to tool.

V 4.4 420cc OHV Gas Engine with Electric Start 8449019

Visit www.princessauto.com for more information 5

1. Do not operate any tool when tired or under the influence of drugs, alcohol

or medications.

2. Avoid wearing clothes or jewelry that can become entangled with the moving

parts of a tool. Keep long hair covered or bound.

3. Do not overreach when operating a tool. Proper footing and balance enables

better control in unexpected situations.

SPECIFIC SAFETY PRECAUTIONS

WARNING! DO NOT let comfort or familiarity with product (gained from repeated

use) replace strict adherence to the engine safety rules. If you use this engine

unsafely or incorrectly, you can suffer serious personal injury.

NOTICE! This engine is designed for recreational and light farm use. It is not

intended for heavy industrial use, in aircraft products or vehicles in competitive

events. These uses may shorten the engine’s useful life span.

1. Use the correct engine for the job. This engine was designed for a specific

function. Do not modify or alter this engine or use it for an unintended purpose.

2. All users must understand the operation of all controls and learn how to stop

the engine quickly in case of emergency.

3. Do not tamper with governor spring, links or other engine parts to increase

speed or power.

4. The engine and exhaust become very hot during operation. Severe thermal

burns can occur on contact, especially with the muffler.

a. Keep the engine at least 3 feet (1 meter) away from buildings and other

equipment during operation.

b. Remove accumulated debris from muffler and cylinder area. Combustible

debris, such as leaves, grass, brush, etc. can catch fire if they come in

contact with a hot engine.

c. Do not place anything on the engine while it is running.

d. Allow muffler, engine cylinder and fins to cool before touching.

8449019 420cc OHV Gas Engine with Electric Start V 4.4

6 For technical questions call 1-800-665-8685

CARBON MONOXIDE POISONING

WARNING! Never operate a gas engine indoors or in a confined space as the

exhaust contains carbon monoxide gas. Inhalation of carbon monoxide gas can

lead to illness or death. The area must be well ventilated. Opening windows and

doors is not enough to ventilate an area.

Carbon monoxide is a colourless and odourless gas that is difficult to detect.

Carbon monoxide poisoning results from inhalation of the gas and may be lethal if

left untreated. Evacuate all people to an area with clean air and seek immediate

medical attention for any person experiencing the following symptoms:

1. Headache

2. Confusion

3. Shortness of breath

4. Weakness

5. Chest Pain

6. Dizziness

7. Blurred Vision

8. Nausea and vomiting

9. Unconsciousness

BATTERY PRECAUTIONS

WARNING! Do not charge a damaged or frozen battery. Contact your local

municipality for proper disposal procedures.

CAUTION! Only charge a battery with a charger designed for that purpose.

Do not use modified chargers or a charger that does not specify the voltage,

amperage or recharge rate. Improper charging can lead to battery rupturing.

1. Lead-acid batteries generate oxygen and hydrogen. These gases can be

explosive. Keep batteries well ventilated. Remove any source of ignition

such as an open flame or a device like a heater from the area. Sparks may

also ignite the gas.

2. Lead batteries contain sulfuric acid, also referred to as electrolyte or

battery acid. The acid is corrosive and can cause a skin burn if leaking or

splashed. The acid may also pose a threat if inhaled or ingested

accidentally. The acid can destroy normal clothing and injure the flesh

underneath. Wear splash-proof goggles and protective clothing when

handling a battery.

V 4.4 420cc OHV Gas Engine with Electric Start 8449019

Visit www.princessauto.com for more information 7

3. Even a discharged battery may still carry a charge. To prevent a shock,

place battery terminal caps or covers over the terminal to prevent

accidental contact. Hold the battery by the bottom if moving the battery to

a different location.

4. Batteries are heavy due to the weight of the lead and liquid contained

inside. A lead-acid battery could weigh upwards of 50-60 lbs. Use safe

lifting methods if moving the battery.

UNPACKING

WARNING! Do not operate the engine if any part is missing. Replace the missing

part before operating. Failure to do so could result in a malfunction and

personal injury.

Remove the parts and accessories from the packaging and inspect for damage.

Make sure that all items in the parts list are included.

Contents:

• Gas Engine

• Spark Plug Wrench

8449019 420cc OHV Gas Engine with Electric Start V 4.4

8 For technical questions call 1-800-665-8685

IDENTIFICATION KEY

When this manual refers to a letter, it corresponds to the components shown in

Figure 1. Compare the illustration with your engine to familiarize yourself with the

location of various features and controls.

A Muffler

B Air Cleaner

C Spark Plug

D Throttle Lever

E Choke Lever

F Fuel Valve

G Starting Handle/

Recoil Starter

H Drain Plug

I Fuel Filler Cap

J Fuel Tank

K Pipe

L Starting Motor

M Engine Switch

N Breaker

O Dipstick/Oil Filler Cap

P Starting Motor

Cables

ASSEMBLY & INSTALLATION

References to the Parts List are represented by the pound symbol (#).

References to the Parts Identification are represented by a letter (A).

1. The engine comes assembled.

2. The engine is not shipped with oil. Starting the engine without oil will damage

the engine beyond repair. Add oil per the maintenance instructions.

3. Check that the filter is in place. See Maintenance – Service the Air Filter

CONNECTING THE BATTERY

NOTICE! Do not reverse the polarity when connecting the battery as as this

will short circuit the battery charging system or damage the equipment.

Fig. 1

V 4.4 420cc OHV Gas Engine with Electric Start 8449019

Visit www.princessauto.com for more information 9

The engine has an electric start option that requires a 12 volt battery (sold-

separately). Use a 12V battery with a rating of at least 18 ampere-hours with

the engine.

The engine has two battery cables with copper lugs. The polarity of each cable

is displayed on a rubber cover where they connect on either side of the starter

motor (Fig. 2-2).

1. Remove the wing nuts from the battery’s

positive (+) and negative (-) terminals.

2. Slide the positive battery cable lug

(Fig. 2-3) onto the positive terminal. Coat

the cable end with grease and reattach the

wing nut. Tighten hand-tight.

3. Slide the negative battery cable lug

(Fig. 2-1) onto the negative terminal. Coat

the cable end with grease and reattach the

wing nut. Tighten hand-tight.

4. Secure the battery so it won’t move

while the engine is in use.

OPERATION

BEFORE STARTING THE ENGINE

WARNING! Do not start or run engine in an enclosed area, even if the doors or

windows are open. Engine exhaust contains carbon monoxide (see Carbon

Monoxide Precautions).

1. Make sure spark plug (C), muffler (A), fuel cap (I) and air cleaner (B) are in

place and secured.

2. Ensure the spark plug lead is securely connected to the spark plug, otherwise

unintentional sparking can result, causing a fire or electric shock.

3. Check that all protective covers and guards are in place.

4. Check that all nuts, bolts and screws are tight.

Fig. 2

2-1

2-2

2-3

8449019 420cc OHV Gas Engine with Electric Start V 4.4

10 For technical questions call 1-800-665-8685

5. Check the fuel level.

6. Check the engine oil level. Running the engine without enough oil can damage

the engine.

7. Look around and underneath the engine for signs of oil or gasoline leaks.

a. Do not start the engine until any spilled fuel has evaporated.

8. Remove any excessive dirt or debris, especially around the muffler (A) and

recoil starter (G).

9. Look for signs of damage.

10. Check the equipment powered by this engine.

11. Review the instructions provided with the equipment powered by this engine for

precautions and procedures that should be followed before starting the engine.

STARTING THE ENGINE

WARNING! Direct-coupled equipment components such as, but not limited to,

blades, impellers, pulleys, sprockets, etc., must be securely attached before

the engine is started to avoid injury or damage.

CAUTION! Failure to follow the steps below will result in rapid retraction of the

starter cord faster than the user can let go. This will pull the user’s hand and

arm toward the engine, possibly resulting in an injury.

1. Move the fuel valve (F) to the ON position.

2. Move the choke lever (E) to the CLOSED position if the engine is cold. The

choke is unnecessary when restarting a warm engine.

3. Move the throttle lever (D) away from MIN. position, about 1/3 of way toward

the MAX. position.

4. Turn the engine switch (M) to the ON position.

5. Pull Start - Pull the starter handle (G) lightly until you feel resistance, then pull

the starter handle briskly. The engine should turn over and start running.

a. Do not allow the starter handle to snap back against the engine.

Instead, return the starter grip gently by hand.

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