1985 OMC 65, 100 and 155 HP Models Commercial Service Repair manual, PN 507450-D, Page 393Get this manual
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drop off no more than 700-1400 kPa (100-200 psi) after the motor is stoppedIf the gauge reading continues to drop, leakage is indicated in the trim up relief valve, impact letdown valve, tilt check va