Page 116 - Mercury Service Tool Guide (2021) - 8M0174458
P. 116
FOURSTROKE MODELS
ADAPTER FITTING TACHOMETER / MULTI METER KIT FOURSTROKE MODELS
91-822778A 3 91-892647A01
Install in place of the manual release valve to measure the internal pressure of the Measures RPM on spark ignition (SI) engines. ohms, amperes, AC and CD
power trim pump in the down mode. voltages; records maximums and minimums simultaneously and accurately reads
in high RFI environments.
PRESSURE ADAPTER FITTING ‑ DOWN Outboard and MerCruiser
DVA/MULTIMETER
91-8M0054662
Install in place of the manual release valve to measure the down pressure in the
power trim system.
PRESSURE ADAPTER FITTING ‑ UP
91-8M0061797
Install in place of the manual release valve to measure the up pressure in the 91- 99750A 1
power trim system. Tests the electrical and ignition systems. Consists of a VOA meter with built‑in
direct voltage adapter.
O-RING SET
25-8M0062937
Replacement O‑Ring set for Up and Down Pressure Adapter Fittings P/N
8M0054662 and P/N 8M0061797.
UPPER TRIM BEARING INSTALL AND REMOVAL TOOL
91-8M0083568
Installs and removes the upper trim cylinder bearings.
BUSHING INSTALL TOOL
91-875215A 1
Installation tool that aids in the installation of driveshaft bushings.
Mercury Service Tool Guide 109
