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Toro 51903; 51904; 51906; 51907 - Troubleshooting

Toro 51903; 51904; 51906; 51907
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EN–13
2. Start the engine and allow it to run until it stalls.
This ensures that all fuel has been drained from
the carburetor.
3. Allow the engine to cool. Remove the spark plug
and put approximately 1 oz (30 ml) of any high
quality motor oil or 2-cycle oil into the cylinder.
Pull the starter rope slowly to distribute the oil.
Reinstall the spark plug.
Note: Remove the spark plug and drain all of
the oil from the cylinder before
attempting to start the trimmer after
storage.
4. Thoroughly clean the unit and inspect for any
loose or damaged parts. Repair or replace
damaged parts and tighten loose screws, nuts or
bolts.
The unit is now ready for storage.
5. Store the trimmer in a dry, well-ventilated area
out of the reach of children.
Troubleshooting
Problem Cause Action
Engine Will Not Start
Empty fuel tank Fill fuel tank
Primer bulb wasn’t pushed enough Press primer bulb fully and slowly
5-7 times
Engine flooded Use starting procedure WITHOUT
USING CHOKE
Engine Will Not Idle Cutting head bound with grass Stop engine and clean cutting head
Engine Will Not Accelerate Carburetor misadjusted Adjust carburetor
Engine Lacks Power or Stalls When
C tti
Throttle wire has come loose Tighten throttle wire
g
Cutting
Dirty air filter Clean or replace air filter
No oil in fuel Add oil to fuel
Cutting Head Will Not Advance Line Cutting head out of line Refill with new cutting line
Inner reel bound up Replace inner reel
Cutting head dirty Clean reel and spool
Indexing teeth worn or burred Replace reel and spool
Line welded Disassemble, remove the welded
section and rewind the line
Line twisted when refilled Disassemble and rewind reel
Not enough line is exposed Push the Bump Knob and pull out
102 mm (4 in) of line until the line is
outside of the cutting head
If further assistance is required, contact your local authorized Toro service dealer.

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