POWER TRIM
90-828631R3 MARCH 1999 Page 5B-13
Tilt Up
In the up mode, as the trim rod (b) extends from the cylinder, the memory piston (e) clears
or uncovers the pressure relief passage. Oil from the up cavity will enter this passage and
open the tilt pressure relief valve (k). This valve lowers the amount of pressure available to
lift the outboard motor. With the engine in forward gear, and at high engine rpm, the oil pres-
sure available will not be able to overcome the propeller thrust, limiting the trim range to be-
low the pressure relief orifice. When the engine rpm decreases or if engine is not in forward
gear, the oil pressure is available to extend the trim rod (b) up into the tilt range.
a-Electric Motor
b-Trim Rod
c-Impact Relief Valve
d-Shock Piston
e-Memory Piston
f-Manifold
g-Suction Valve
h-Down Circuit Pressure Operated Valve
i-Tilt Relief Actuator
j-Manual Release Valve
k-Tilt Relief Valve
l-Up Circuit Pressure Operated Valve
m-Down Circuit Feed Check Ball
n-Oil Pump Gears
o-Up Circuit Feed Check Ball
p-Shuttle Valve
q-Down Circuit Pressure Relief Valve
r-Check Ball
s-Reservoir Oil
t-Oil Reservoir
u-Oil Fill Cap
v-Shock Return Valve
w-Filter
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