Yamaha FT50C Service Manual page 30

GEN
INFO
Stopping condition
When the power trim and tilt switch is not pushed (released), the gear pump does not pump the
fluid, the up-main valve and the down-main valve are closed, and the power trim and tilt fluid pres-
sure in the system remains constant. This allows the ram to maintain its position until the power trim
and tilt fluid flows through the system again.
When the outboard motor hits something in the water
The check valve of the trim cylinder and the tilt piston absorber of the tilt piston help to prevent inter-
nal damage to the power trim and tilt unit and help to protect the bracket and lower unit from dam-
age in case the outboard motor hits something during operation.
When the outboard motor hits something, highly pressurized fluid in the upper part of the power trim
and tilt cylinder pushes down the check valve of the trim cylinder. At the same time, fluid pressure in
the upper part of the trim cylinder increases and the tilt piston absorber is pushed down. As a result,
the tilt piston and the ram are pushed up without the free piston. The tilt piston is stopped before
reaching the top of the trim cylinder by the damper function of the tilt piston absorber to protect the
power trim and tilt unit from damage.
Damper function
1 Power trim and tilt cylinder
2 Trim cylinder
3 Ram
4 Tilt piston absorber
5 Tilt piston
6 Free piston
1-25
General information
7 Check valve
8 Tilt piston absorber
9 Tilt piston
È Send
É Moving direction
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S62Y1430K
62Y5A11