TECHNICAL DATA

 

51

55

Engine

 

 

Cylinder volume, cu.in/cm3

3,0/49

3,1/50,9

Cylinder bore, inch/mm

1,73/44

1,77/45

Stroke, inch/mm

1,26/32

1,26/32

Idle speed, rpm

2 500

2 500

Power, kW/ rpm

2,3/ 9 000

2,4/ 9 000

Ignition system

 

 

Manufacture

Electrolux

Electrolux

Type of ignition system

ET

ET

Spark plug

Champion

Champion

Electrode gap, inch/mm

RCJ 7Y

RCJ 7Y

0,020"/0,5

0,020"/0,5

Fuel and lubrication

 

 

system

 

 

Manufacturer

Zama

Zama

Carburetor type

C1Q-EL7

C1Q-EL7

Fuel capacity, US pint/litre

0,6/1,27

0,6/1,27

Oil pump capacity at

 

 

8 500 rpm, ml/min

10

10

Oil capacity, US pint/litre

0,3/0,63

0,3/0,63

Type of oil pump

Automatic

Automatic

Weight

 

 

Without bar and chain,

 

 

Lbs/kg

5,2/11,46

5,2/11,46

Chain/bar

 

 

Standard bar length,

 

 

inches/cm

15"/38

15"/38

Recommended bar

 

 

lengths, inches/cm

13-24"/33-60

13-24"/33-60

Usable cutting length

 

 

inches/cm

12-23"/30,5-58,5

12-23"/30,5-58,5

Chain speed at max.

 

 

power, m/sec

17,4

17,4

Pitch, inch/mm

0,325"/8,25

0,325"/8,25

Thickness of drive link,

3/8" /9,52

3/8" /9,52

 

 

inch/mm

0,050"/1,3

0,050"/1,3

Number of teeth on drive

0,058"/1,5

0,058"/1,5

 

 

sprocket

7

7

Recommended original and replacement bar and chain combinations

Following is a list of recommended cutting equipment for the Husqvarna chain saw models 51 and 55. The combinations of power head, bar and chain have been investigated in accordance with the kickback and vibration requirements of ANSI B 175.1–1991.

The guide bar nose radius is determined by either the maximum number of teeth in the nose sprocket or the corresponding maximum nose radius of a solid bar.

The following list is the chain saw manufacturers recommendations. There may be other combinations available, which will also achieve kickback protection.

As we are listing the maximum guide bar nose radius, you may use a guide bar with smaller nose radius than in our list. For guide bars of the same length, all sprocket-nose guide bars of the same pitch and having the same number of sprocket teeth may be considered to have equivalent kickback energy. A hard nose bar having the same length and nose radius as a sprocket-bar may be considered to have equivalent or less kickback energy than the sprocket- nose bar.

Low kickback saw chain is a chain which has only met the kickback performance requirements of ANSI B 175.1 safety requirements for gasoline powered chain saws when tested on the representative sample of chain saws below 3.8 cu. in. specified in ANSI 175.1. We recommend that you as a replacement use the listed chains or "Low kickback saw chains" which are available at your dealer.

Guide bar

 

Saw chain

Length

Pitch

Max nose

 

inch

inch

radius

 

 

 

 

 

13

0,325"

10T

Husqvarna H30 or Oregon 95VP

15

0,325"

10T

 

16

0,325"

10T

 

18

0,325"

10T

 

 

 

 

 

15

0,325"

10T

Husqvarna H21/H25/S24 or

16

0,325"

10T

Oregon 21LP/21VB/34LG/34SL

18

0,325"

10T

 

20

0,325"

10T

 

 

 

 

 

18

0,325"

12T

Husqvarna H21 or Oregon 21LP

20

0,325"

12T

 

 

 

 

 

16

3/8"

11T

Husqvarna H42/S48 or

18

3/8"

11T

Oregon 73VL/73LG/77SL

20

3/8"

11T

 

24

3/8"

11T

 

 

 

 

 

Note: For the chains above you are free to choose between 0,050" and 0,058" gauge drive link for the corresponding bar, see the table below.

0,058"/1,5mm

–

–

H25,H21

 

S24

 

21VB

34LG

34SL

 

 

 

 

 

 

 

 

 

 

 

 

0,050"/1,3mm

H30

95VP

–

 

–

 

20VB

33LG

33SL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0,058"/1,5mm

H42

S48

73VL

 

73LG

77SL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0,050"/1,3mm

–

–

72VL

 

72LG

76SL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

34´*33Q¶5"¨

– English

Page 33 Page 35
Page 34
Image 34
Husqvarna 51 manual Technical Data
Page 33 Page 35

51 specifications

The Husqvarna 51 is a well-regarded chainsaw that has made its mark in the world of outdoor power equipment. Renowned for its balance of performance and usability, the Husqvarna 51 is often favored by both amateur woodcutters and professionals alike. This versatile chainsaw is designed for a range of tasks, from light-duty pruning to more demanding woodcutting jobs.

One of the standout features of the Husqvarna 51 is its powerful 2.3 horsepower engine. This robust engine allows the saw to tackle larger cuts with ease, making it a reliable tool for any woodcutting needs. Coupled with a lightweight design, the chainsaw ensures reduced fatigue during prolonged use, enhancing user comfort and efficiency.

The Husqvarna 51 utilizes a simple yet effective starting system known as the Smart Start technology. This feature minimizes resistance in the starter cord, allowing for easier and quicker engine starts. Consequently, even less experienced users can confidently get the saw up and running without unnecessary frustration.

Another important characteristic of this model is its air injection system. This technology works by using centrifugal force to remove larger debris from the air filter before it reaches the engine. As a result, the filter stays cleaner for longer, reducing the frequency of maintenance and ensuring optimal engine performance. This system significantly prolongs the life of the chainsaw while maintaining high power levels.

The Husqvarna 51 also features an adjustable oil pump that allows operators to control oil flow as needed. This ensures proper lubrication of the chain and bar, which is critical for maintaining performance and extending the lifespan of the cutting components. The saw’s chrome-plated cylinder further contributes to durability by providing an added layer of resistance against wear and tear.

Safety is a priority with the Husqvarna 51, which comes equipped with an inertia-activated chain brake. This feature automatically stops the chain in the event of kickback, providing additional peace of mind to the user. The front hand guard and ergonomic handle design also enhance user control, contributing to a safer and more comfortable cutting experience.

Overall, the Husqvarna 51 stands out as a reliable, sturdy, and user-friendly chainsaw. Its blend of power, technology, and safety features makes it an ideal choice for a variety of cutting tasks, making it popular among both casual users and seasoned professionals. Whether you are trimming branches or cutting firewood, this chainsaw offers the performance you need for effective woodcutting.
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