1995 Johnson/Evinrude Outboards 40 thru 55 2-Cylinder Service Manual, Page 83Get this manual
VRO$ Component Servicing r:=J Anytime the VRO oil supply line has been disconnected
from the engine, you must run 50:1 fuelloil mixture in the fuel tank for period of time sufficient to verify oil consumptionOnce oil consumption has been verified, you can switch back to clear fuel in the tankOil Supply Hose and Pickup Assembly If you suspect the oil supply to the check two areaspump is being restricted,
1Remove the pickup assembly and inspect for clogged or contaminated filter: Remove the four No25 Torx screws, and remove the pickup assembly from the reservoir Carefully, remove the pickup filter and flush with mild solvent to remove any contamination Install the filter, being careful not to move the pickup assembly on its support rods2With the pickup assembly out of the reservoir, vacuum test the system to check for air leaks: Carefully, remove the oil hose from pickup assembly and from engine oil inlet fitting Use low pressure air to purge hose of oil Use cap holder, PIN 329661to plug pickup end of hose Attach vacuum tester to the engine end of oil line and draw inHg vacuumThe oil system is good if it can maintain in Hg vacuum for at least five minutes