1965 Evinrude SportFour Heavy Duty 60 HP Outboards Service Manual, 4204, Page 19Get this manual
LEAF VALVES The only requirements for leaf valves are that they must be cleaned of all dirt, gum, and varnish, and that the leaves must be perfectly flat and without distortion so that they form perfect seal with the plateDO NOT attempt to bend or repair damaged leaf; replace it if broken or damagedAlso check condition of leaf stop for bent elements and replace if damagedIf leaf valve is damaged, the leaf valve and stop must be replacedOIL DRAIN VALVE ASSEMBLY aThe oil drain leaf valve assembly ordinarily requires little or no attentionWhen the motor is being serviced, however, remove and Clean the oil drain openings and screens on the leaf plate basebIf gum or varnish is found in the crankcase during servicing, clean the leaf plate in OMC Accessory Engine Cleaner, as it is likely that gum and varnish have also been deposited therecMake sure that the leaf valve seats against the leaf plateClean anti-flash screensReassemble and installCheck space between leaf and leaf stopIf clearance is not between .023".039", bend leaf stop for proper clearanceSee Figure 3-18 freely without bindingReplace carburetor body if valves or shafts are excessively worn or damagedNOTE The threaded edges of the choke and throttle valve attaching screws are staked during carburetor assembly to prevent loss during operationDisasiembly of these valves is possible, but replacement of the carburetor body is recommendedSOLENOID The choke solenOId requires very little attentionFor efficient operation, the plunger should be free from corrosion so that it can move freely in the solenoid housingIt is not necessary to lubricate the solenoid plunger since the oil film will only attract dust and cause sluggish plunger movementHIGH-SPEED TUBE ASSEMBLIES Thoroughly clean, making sure no gum or varnish deposits remainDry after cleaning with compressed airKeep clean for final assemblyThe high-speed tubes are not serviced individuallyif replacement is necessary, the entire assembly must be replaced CORE PLUGS