Toro 51945, Operator'S Manual

16

Figure 9

Maintenance

7. 

Rinse the air filter and let it dry completely.

8. 

Work two drops of oil into the air filter.

9. 

Replace the air filter (fits only one way).

10. 

Replace the air filter cover.

11. 

Tighten the air filter cover by turning the knob clock-

 wise.

12. 

Replace the spark plug boot.

NOTE:

 Replace the air filter as indicated by the mainte

-

nance schedule.

Replacing the Spark Arrestor

See Figure 9.

Note: 

Depending on the type of fuel used, the type and 

amount of lubricant used, and/or your operating conditions, 

the exhaust port, muffler, and/or spark arrestor screen may 

become blocked with carbon deposits. If you notice a power 

loss with your gas powered tool, you may need to remove 

these deposits to restore performance. We highly recom-

mend that only qualified service technicians perform this 

service.

The spark arrester may need to be replaced after repeated 

use. If replacement is necessary, use Toro part number 

000998216.

Spark 

Arrester

Plate

Muffler

Cover

Muffler

Gasket

Screw(s)

Screw(s)

Cover

Screw(s)

Muffler

To replace the spark arrester:

 1.

  Remove the five screws that hold the cover.

Note:

 Removing these screws requires the use of a  

  T20 and T25 torx screwdriver.

 2.

  Remove the cover.

 3.

  Remove the two screws holding the muffler assembly  

  in place.

 4.

  Remove the muffler assembly and muffler gasket. It  

  may be necessary to work the muffler assembly free  

  from the muffler gasket.

 5.

  Separate the muffler cover from the muffler.

 6.

  Remove the three screws that hold the plates on the  

  muffler.

 7.

  Remove the spark arrester.

 8.

  Replace the old spark arrester with the new one. 

 9.

  Reassemble the muffler by reinstalling the plates and  

  tightening the three screws (torque to 18 in.lb. mini- 

  mum, 22 in.lb. maximum). 

10.

  Reassemble the muffler and muffler cover and attach to  

  the muffler gasket with the two screws.

11.

  Reinsert the muffler assembly and tighten two screws  

  to engine (torque to 60 in.lb minimum, 80 in.lb. maxi- 

 mum).

12.

  Reinstall the cover on the tool and fasten with the five  

  screws (torque to 16 in.lb. minimum, 22 in.lb. maximum).

Note:

 Do not overtighten screws.

Replacing the Spark Plug

See Figure 10.

All model numbers included in this manual use a 

Champion RCJ4 spark plug. Use an exact replacement and 

replace annually.

1.

  Remove the spark plug boot.

2.

  Loosen the spark plug by turning it counterclockwise 

with a socket.

Maintenance

Figure 10

Spark 

Plug

Spark Plug 

Boot