pag. 4
Release 00 - 02/2008
Engine WBE 0701-WBE 0704
Service manual
8. CARBURATION ................................................................................................ 21
8.1. Removing and cleaning the carburettor .............................................................................................21
8.2. Replacing the carburettor .....................................................................................................................
24
8.3. Adjusting minimum speed ....................................................................................................................
24
8.4. Adjusting maximum speed ...................................................................................................................
24
8.5. Adjusting the carburation ......................................................................................................................
24
9. GOVERNOR SYSTEM OF THE CARBURETTOR ................................................. 25
9.1. Adjusting of accelerator cable ............................................................................................................25
9.2. Adjusting maximum speed ...................................................................................................................
26
9.3. Replacing the lever support ..................................................................................................................
27
10. IGNITION ....................................................................................................... 28
10.1.Checkingtheefciencyoftheignitionsystem ..................................................................................28
10.2. Adjusting the air gap and checking the coil ......................................................................................
29
10.3. Replacing the coil ..................................................................................................................................
30
11. TURNING OFF AND STOPPING THE ENGINE ................................................ 31
11.1. Checking the control cable ..................................................................................................................31
11.2. Checking the ignition off microswitch .................................................................................................
31
11.3. Checking the brake ...............................................................................................................................
32
11.4. Replacing the system for turning off and stopping the engine .........................................................
33
12. EXHAUST SYSTEM .......................................................................................... 34
12.1.Removingandreplacingthemufer ...................................................................................................34
13. ENGINE BLOCK - External operations ........................................................ 35
13.1. Checking the compression ...................................................................................................................35
13.2. Adjusting the valve clearance .............................................................................................................
36
13.3. Dismantling and cleaning the cylinder head .....................................................................................
37
13.4 Overhauling the cylinder head and valves ........................................................................................
38
13.5.Dismantlingandreplacingthemagnetoywheel .............................................................................
40
13.6. Checking the oil breather .....................................................................................................................
41
13.7.Replacingtheuppercompressionringoftheengineshaft(ywheelside) ....................................
41
13.8.Replacingthelowercompressionringoftheengineshaft(sumpside) ..........................................
42
14. ENGINE BLOCK - Overhauling internal parts ............................................. 43
14.1. Removing the engine from the lawnmower ........................................................................................43
14.2. Carter opening .......................................................................................................................................
44
14.3. Dismantling and checking the camshaft and counterweight governor ..........................................
45
14.4. Dismantling and checking the piston, piston rings, connecting rod and engine shaft ..................
47
15. TROUBLESHOOTING ...................................................................................... 53
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