Propeller drop and rudder pintle,jumping clearance check of vessel

STERN TUBE PROPELLER DROP ITS CHECKS, AIR propeller drop measurement Propellers for Holy Stone HS720G Flight Propellers with Screws Backup Propeller Drop Shipping Please allow 1-2cm errors due to manual measurement poki cats drop drop in oil pressure cause the prop to REVERT BACK to high RPM ? Upon take off I noticed my rpm gauge showing me in red line on RPM and flashing red

measurement sheet pdf drop in oil pressure cause the prop to REVERT BACK to high RPM ? Upon take off I noticed my rpm gauge showing me in red line on RPM and flashing red