PERIODIC MAINTENANCEJH Series Operation Manual 9912/05Wash the Turbocharger blower (IfEquipped)Contamination of the turbocharger causesrevolutions to drop and engine output tofall.If a significant drop in engine output isnoted (10% or more), wash theturbocharger blower.This should be done only by a trained andqualified technician. Consult authorizedYanmar Marine dealer or distributor.Adjusting the Alternator V-ribbedbelt TensionSee Checking and Adjusting the AlternatorV-ribbed belt Tension on page 87.Checking the Wiring ConnectorsConsult authorized Yanmar Marine dealeror distributor.Tightening All Major Nuts and BoltsSee Tightening Fasteners on page 76 orconsult authorized Yanmar Marine dealeror distributor.Perform the following maintenance every500 hours or 2 years of operation,whichever comes first.• Replacing the Exhaust/Water MixingElbow• Replacing Rubber HosesReplacing the Exhaust/Water MixingElbowReplace the mixing elbow with a new oneevery 500 hours or 2 years, whichevercomes first, even if no damage is found.Consult authorized Yanmar Marine dealeror distributor.Replacing Rubber HosesReplace rubber hoses every 2000 hours or2 years, whichever comes first.Consult authorized Yanmar Marine dealeror distributor.Every 500 Hours of Operation
