Briggs & Stratton SP43-W Quick Setup Manual Download Page 2

Install Trimmer Head Line - Figure 3

Install Brushcutter Blade to the Cutting Head - Figure 4

1.  Align the hole on the cutting head (

A

) to the 

notch (

B

) on the spline pad (

C

).

2.  Use Allen Wrench (

D

) to hold spline pad in 

position.

3.  While holding Allen wrench in place, install 

the blade (

E

), clamp cup (

F

), protective cup 

(

G

) lock washer (

H

) and locknut (

J

).

NOTE: 

Ensure that the spline pad is placed in 

the correct position when installing. 

The shoulder side 

must

 face the cutting 

head.

Install Handle - Figure 5 

1.  Turn the red knob counterclockwise to 

loosen the handle cap assembly.

2.  Place the handle inside the cap assembly 

and turn the red knob clockwise to tighten.

NOTICE:

 When rotating the handle assembly for 

transporting or storage, Do Not allow the cable 

to wrap around the handle cap assembly, or the 

cables may become damaged or disconnected.

Install Carrying Harness - Figure 6

1.  Hook the harness into the fastening eyelet.

NOTE:

 The harness should be placed in the eyelet 

hole that allows the trimmer head or blade to 

cut parallel to the ground.

2.  Slip the harness strap over your shoulder.

3.  Adjust the length of the strap to allow the 

trimmer head or blade to cut parallel to the 

ground. 

Fuel Recommendations

 - Figure 7

Fuel must meet these requirements:

•  Clean, fresh, unleaded gasoline

•  A minimum of 87 octane/87 AKI (91 

RON). 

•  Gasoline with up to 10% ethanol 

(gasohol) or up to 15% MTBE (methyl 

tertiary butyl ether) is acceptable.

Mix Fuel and Oil

Mix a high quality 2-cycle oil with gasoline at a 

25:1 gasoline -to-oil ratio.

CAUTION

 Do not use unapproved gasoline, 

such as E85. Do not modify the engine to run 
on alternate fuels. This will damage the engine 
components and void the engine warranty.

1.  Clean area around fuel cap. Remove cap.

2.  Slowly add fuel and oil mixture (

A

) to the fuel 

tank (

B

). Do not fill above the bottom on the 

fuel tank neck (

C

).

3.  Install fuel cap and let any spilled fuel 

evaporate before starting engine.

Starting Procedures

Consult the Unit Operator’s Manual for procedures on how to start the unit.

D

C

A

A

B

1.  Press in the tabs (

A

) on side of the trimmer  

head base to remove the cover of the trimmer 

head and the spool (

B

).

2.  Cut a 3 meter length of 2.6 mm trimming line. 

Thread half the cut line (1.5 meters) through 

the center of the spool (

C

).

3.  Evenly wind both lines around the spool in the 

direction of the arrow on the spool cover. One 

line is wound on the top half of the spool and 

the other is wound on the lower half of the 

spool.

4.  Fit the ends of each line through the brass 

eyelets (

D

) in the trimmer head base.

5.  Place the spool in the base and press until the 

tabs lock in place.

B

C

A

Figure 3

Figure 5

Figure 7

Figure 6

Figure 4

B

A

C

D

E

G

H

J

F

Not 

for 

Reproduction

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