Toro 303447 - Troubleshooting: Air System; Airflow Restrictions and Filters

Next,let'slookatAIR
Airisrequiredtoprovidetheoxygenneededfor
combustion,andtheenginealsoneedsasufficient
amountofair,forcompressiontobeadequate.
Insmallenginesthereareonlytwoareathatcanrestrict
theflowofairintotheengine.
Firstisthethrottleplateinthecarburetororintake
manifoldinfuelinjectedengines.

Theotherlocationistheairfilter.Thiscanbeanair
restrictionpointifnotproperlymaintained.
Theprimaryfunctionofanairfilteristodeliverbothhigh
airflowanddirtprotection.
Bothairflowanddirtprotectionarecriticaltoengine
performance.
Thebasictypesofairfiltersare.
Oiled‐foam,thisisafoamtypematerialwhichisoiledto
capturedirtparticlesandkeepsthemfromenteringthe
engine.
Thesetypesoffiltersarenormallycleanedandre‐oiledas
amaintenanceprocedure
Papertypefiltersusedapleatedpaperelementwith
holesofaspecificsizedesignedtocapturedirtparticles
alsoofaspecificsize.
Thesecanalsobecleanedasamaintenanceprocedure.
Dual‐elementfiltersareacombinationofbothtypes.
Theyconsistofapaperelementcoveredbyanoiled‐foam
element.