1995 Johnson Evinrude "EO" 60 LV 90, 115, 150, 150C, 175 Service Manual, P/N 503151, Page 68Get this manual
Pulse Limiter Fitting
The pulse limiter fitting for the VRO pulse hose has an integral check valveThe check valve is not serviced separately, but must be clear to allow normal pump operationA clogged check valve will limit fuel and oil supply, causing serious powerhead damage1Remove the pulse limiter fitting from the crankcase f17l 2Backflush the valve with OMC Carburetor and Choke Cleaner to remove any carbon depositsIf you find excessive carbon deposits, check the engine for causes of backfiring: Linkage adjustments incorrect Engine temperature incorrect Crankcase air leaks Carburetor problems Extended use of flushing attachment