Section 6
DIAGNOSTIC TESTS
9.Now check the flywheel magnet by holding a screwdriver at the extreme end of its handle and with its point down. When the tip of the screwdriver is moved to within 3/4 inch (19mm) of the magnet, the blade should be pulled in against the magnet.
10.Now check the flywheel key. The flywheel’s taper is locked on the crankshaft taper by the torque of the flywheel nut. A keyway is provided for alignment only and theoretically carries no load.
Note: If the flywheel key becomes sheared or even partially sheared, ignition timing can change. Incorrect timing can result in hard starting or fail- ure to start.
RESULTS:
If sparking still does not occur after adjusting the armature air gap, testing the ground wires and per- forming the basic flywheel test, replace the ignition magneto(s).
MAGNETO
Figure 6-49. – Setting Ignition Magneto (Armature)
Air Gap
TEST 36 - TEST FUEL SHUTOFF SOLENOID
(FSS)
PROCEDURE
1.Disconnect Wire 16 from the Starter Contactor (SC) located on the starter motor.
2.Remove the air cleaner cover.
3.Place the
RESULTS:
Refer to flow chart.
TEST 37: TEST FUEL SHUTOFF SOLENOID
VOLTAGE
PROCEDURE:
1.Set a voltmeter to measure DC voltage.
2.Disconnect the two pin connector from the Fuel Shutoff Solenoid (FSS).
3.Connect the positive meter test lead to the red wire. Connect the negative meter test lead to the black wire. Place the Start-
4.Set a voltmeter to measure resistance.
5.Connect one meter test lead to the black wire. Connect the other meter test lead to frame ground. Continuity should be measured. If continuity is not measured repair or replace the black ground wire or correct poor ground connection.
6.Set a voltmeter to measure DC voltage.
7.Remove Wire 14 from the
RESULTS:
Refer to flow chart.
TEST 38 - CHECK FUEL PUMP
FUEL PUMP
FUEL TO
CARBURETOR
PULSE LINE
FUEL FROM TANK
Figure 6-50. – Fuel Pump and Fuel Lines
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