520 Single Stage Snowthrower
Removing
Engine Cover
Note: In many of the following adjustment and service tasks, it will be necessary to remove and reinstall the engine cover. To remove the cover, proceed as fol- lows:
1.Remove the Engine Key from the switch.
2.Remove the two rear fasteners securing the back of the cover housing. (Figure 9).
3.Remove the fuel tank cap.
4.Remove the cover (see Figure 10).
5.Temporarily reinstall the fuel tank cap.
6.Perform the adjustments or service desired.
7.Reinstall the cover by reversing the removal steps.
Note: The tabs at the lower front of the cover must be positioned correctly.
WARNING
To avoid the possibility of serious bodily injury when performing adjustments, maintenance or lubrication, stop engine and remove key from switch.
Carburetor
Adjustment
The carburetor is properly calibrated and preset at the factory for efficient cold weather operation. There are no adjusting screws on the carburetor.
If it is apparent that the carburetor is not providing sat- isfactory fuel supply to engine, contact your nearest Authorized Tecumseh Service Outlet for service.
Servicing
the Spark Plug
1.Remove Engine Key from switch.
2.Remove the engine cover. (See procedure above.)
3.Disconnect the wire from the spark plug.
4.Inspect the Spark Plug and clean. If necessary, replace the it with a new Spark Plug as recom- mended in the Engine Owners Manual.
5.Adjust the gap on the Spark Plug to .030 inches (.762 mm) using a gauge.
6.Reinstall the plug and tighten firmly.
7.Reconnect Spark Plug wire.
8.Reinstall engine cover.
Remove |
Fuel Tank |
Cap |
Remove two |
rear fasteners |
securing |
cover |
Figure 9. Remove and/or loosen Cover Screws
Lift Cover from Rear of unit
Align rear | Insert front |
tabs & side of | tabs first |
cover when | when |
reinstalling. | reinstalling |
| cover. |
Figure 10. Cover Removal & Installation
Spark Plug |
Wire |
Figure 11. Servicing Spark Plug
8 | 5/2005 |
