Testing; Glow Plug Test - Toro Groundsmaster 300 Series Service Manual

Testing

Glow Plug Test (Fig. 16)
Be careful while handling or testing glow
plugs. Glow plugs become extremely hot. Ac-
cidental contact with the heated plug tip could
cause personal in ury. j
1. Disconnect the wire lead(s) to the glow plug.
2. Remove the glow plug.
3. Inspect the glow plug for signs of a burnt glow plug
end tube.
NOTE: If the metal of the glow plug end is melted, it is
a sign of cylinder overheating. (See Engine Overheats
in the Troubleshooting section of this chapter.)
4. Connect the positive (+) battery terminal to the glow
plug terminal, and the negative (–) battery terminal to
the plug body. If the glow plug glows red-hot, the glow
plug is operating correctly.
5. Replace any glow plugs that do not operate correctly.
Testing Page 4 - 18
Figure 16
®
Groundsmaster 300 Series