2011 Yamaha Motorsports Big Bear 400 4x4 IRS Owners Manual - Page 89

2011 Yamaha Motorsports Big Bear 400 4x4 IRS Manual

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EWB00011 WARNING Indicates a hazardous situation which, if not avoided, could result in death or serious injury. EBU23213 Checking the spark plug The spark plug is an important engine component, which is easy to check. Since heat and deposits will cause any spark plug to slowly erode, the spark plug should be removed and checked in accordance with the periodic maintenance and lubrication chart. In addition, the condition of the spark plug can reveal the condition of the engine. To remove the spark plug 1. Remove the spark plug cap. 1. Spark plug cap 2. Remove the spark plug as shown, with the spark plug wrench included in the owner's tool kit. 8 8-9

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8-9
8
WARNING
EWB00011
Indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
EBU23213
Checking the spark plug
The spark plug is an important engine component,
which is easy to check. Since heat and deposits
will cause any spark plug to slowly erode, the spark
plug should be removed and checked in accor-
dance with the periodic maintenance and lubrica-
tion chart. In addition, the condition of the spark
plug can reveal the condition of the engine.
To remove the spark plug
1.
Remove the spark plug cap.
2. Remove the spark plug as shown, with the
spark plug wrench included in the owner’s tool
kit.
1.
Spark plug cap