Cylinder Block And Crankcase; Knock Sensor - Yamaha WaveRunner FX SHO Service Manual

GEN
E
INFO
Feature and benefit

Cylinder block and crankcase

The cylinder block and crankcase have been newly designed. Cast-in iron sleeves, which offer the
same high reliability of conventional sleeves, have been adopted. The crankshaft journal portions of
the crankcase use a ladder-deck structure in order to achieve high rigidity.
1
2
1 Cylinder block
2 Crankcase

Knock sensor

The knock sensor is installed directly to the cylinder block. The knock sensor detects vibration that
is generated by knocking in the combustion chambers and transmits the information to the ECM. If
the ECM determines that knocking is occurring, it adjusts the ignition timing to control the knocking
and protect the engine from damage.
1
1 Knock sensor
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