1990 Johnson Evinrude "ES" Cross V 88 thru 115, 150 thru 175, P/N 507874, Page 69Get this manual
7The tests in Step indicate the pump is operating normally and the variable ratios are within specifications 8If the pump fails any of these tests, check the pulse limiter fitting before replacing the pump
9If you replace pump, carefully cut the hose to avoid damaging the fittingWhen installing, use ratchet style clamp on the oil supply hoseTorque the screws, pump-to-bracket, to 18-24 inIbs(2-3 Nm)Refer to Hose Routing Chart, this sectionWhen installing oil supply hose, be sure connections are airtightPoor connections could cause serious powerhead damagePuJse limiter Fitting
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pulse limiter fitting for the VRO pulse hose has an integral check valveThe check valve is not serviced sepaoperationrately but must be clean to allow normal
A clogged check valve might restrict VRO fuel and oil supply, oe causing senous power hea ddamage