Ryobi RPT-43W, Owner'S Operating Manual

WARNING! 

Keep all parts of your body away from cutting area, the 
rotating trimmer lines and hot surfaces.

NOTE:

 DO NOT depress the throttle lever until engine 

starts and runs.

NOTE: 

When the weather gets cold, please allow the  

ngine to warm up at idle for longer period of time, before 
engaging to RUN/WARM START position.

10

For 4.0 mm Diameter Line: (Fig. 27-28)

1. Stop the engine and remove spark plug lead.
2. Cut two lengths of trimmer line to 420 mm.
3. Insert through retainer tab and then outwardly through 

metal loop.

4. Pull string so that equal lengths are on each side.
5. Route one end back through wire loop.
6. Likewise, route the remaining end through wire loop.
7. Adjust string so equal lengths extend from the trimmer 

head.

8. Repeat on opposite side.

  5. Follow instructions on 2-cycle oil container for mixing 

fuel. Mix gasoline and 2-cycle oil at a ratio of 50:1. A 
mixture with a 50:1 ratio is obtained by mixing 1 gallon 
(4 liters) of gasoline with 2.6 ounces of oil (77 ml). After 
adding oil to gasoline, shake container momentarily to 
ensure proper mixing.

  6. Mix only enough fuel for your immediate needs. Do not 

store pre-mixed fuel.

  7. Stop engine and allow to cool before refueling.
  8. To fill the Trimmer’s fuel tank with the gasoline/oil 

mixture, place the Trimmer upright on the ground or on 
a sturdy bench and wipe and any debris from around 
the fuel cap.

  9. Remove fuel cap slowly and use a funnel to pour the 

mixture into the tank, and replace the fuel cap.

10. Avoid spilling fuel or oil. Wipe up all fuel spills.
11. Move at least 3 m away from fueling site before starting 

engine.

1. Place the Trimmer on a flat surface.
2. Move the ignition switch (17) to the “ON” position.
3. Move the choke lever up to the “COLD START” position. 

(Fig. 19)

4. Press the primer bulb (7) slowly 6 times. (Fig. 21)
5. Pull the recoil starter handle (10) sharply until the engine 

starts and runs. (Fig. 22)

6. After engine starts and runs for 10-15 seconds, move 

choke lever to “RUN/WARM START” position. (Fig. 20)

Starting Engine

NOTE: 

If the unit still doesn’t start, refer to the ROUBLE-

SHOOTING section of this manual.

Cold Starting The Engine:

1. Place the Trimmer on a flat surface.
2. Move the ignition switch (17) to the “ON” position.
3. Move the choke lever (9) to “RUN/WARM START” 

position. (Fig. 20)

4. Pull the recoil starter handle (10) sharply until the engine 

starts and runs. (Fig. 22)

Stopping The Trimmer

CAUTION! 

The trimmer head and line will continue to rotate for a few 

seconds after the engine has stopped.

For 2.4 mm and 2.7 mm Diameter Line: (Fig. 23-26)

WARNING! 

Use 2.4, 2.7 or 4.0 mm diameter flexible, nonmetallic line 

with Trimmer. Never use alternative cutting
members such as wire or wire-rope, which can become a 

dangerous projectile.

1. Release the throttle lever and allow the engine to idle for 

a few moments.

2. Move the Ignition Switch to the “OFF” position.

1. Stop the engine and remove spark plug lead.
2. Cut two lengths of new trimmer line 420 mm.
3. Insert one end of string into the side opening and route 

around the rear and out the opposite side opening.

4. Pull string so that equal lengths are on each side.
5. While pushing tab inward, route one end back through 

side opening and out the front of retainer.

6. Likewise, route the remaining end through its side 

opening and out the front of retainer.

7. Adjust string so equal lengths extend from retainer.
8. Repeat on opposite side.

Starting A Flooded Engine:

Installing Trimmer Line

1. Place the Trimmer on a flat surface.
2. Move the ignition switch (17) to the “ON” position.
3. Move the choke lever to “RUN/WARM START” position. 

(Fig. 20)

4. Fully depress the throttle lever (12) and pull the starter 

handle repeatedly until engine starts and runs. This could 
require pulling the starter handle (10) many times, 
depending on how badly the unit is flooded. (Fig. 22)

5. If the engine still does not start, allow the unit to sit for 

about 30 minutes, and repeat step 1-4.

Warm Starting The Engine: