Toro 303447 - Advanced Diagnostics and Maintenance; Performing Cylinder Cancel Test; Crankcase Breather Function; Recommended Maintenance Schedule

CylinderCancelTest
Usedtodeterminewhichcylinderhasaproblem.
Thecylinderthatdoesnotaffectthespeedorsoundof
theengineisprobablynotdoingitsshareofthework.
Iftheenginehasaknockandtheknockgoesaway,thatis
thecylindercausingtheknock.
Iftheknockdoesn’tgoawaythenitcouldbea
mechanicalproblem.(ie.Pistonhittingthehead).
Crankcase Breather
Another component to look at is the Crankcase
Breather
Maintains pressure in the crankcase at less than
ambient pressure to assist in the control of oil
consumption.
Excessive engine blowby renders the breather
useless.
Old engines vent to the atmosphere.
New engines vent to the carburetor.
RoutineMaintenance(Def aulttoManufactures
Recommendation)
Every25hours–Check,cleantheairfilter.
Every50hours–Changeengineoil,Replacein‐linefuel
filter.
Every100hours–ReplaceSparkPlug