Yamaha F4C User Manual download pdf (Page 6)

Check your Power Trim & Tilt. From hole shot all the way up

through wide-open throttle operation, it adjusts the thrust angle

of the outboard for maximum performance. Simple checks on

your PT&T unit will help keep it operating at peak efficiency.

• Say what? The PT&T unit is electro-hydraulic, meaning an electric pump moves hydraulic

fluid, which moves the outboard. It’s a very simple, reliable system that under normal

conditions needs only minimal

maintenance.

• Check the rams. Periodically lubricate

the tops of the rams and their contact

points using Yamalube

Marine Grease.

It’s specially formulated to withstand

extreme pressures and resist corrosion

and “wash-away,” even in saltwater

environments. Also, the trim and tilt

rams should be free of corrosion and

show no signs of fluid leaks. If leaking

is present (which usually causes

the outboard to return to the “down”

position by itself over time), have your

authorized Yamaha Marine Dealer

check the system.

• Top it off. Periodically check

the fluid level in the PT&T

unit, and if low, top it off

using Yamalube Performance

Power Trim & Tilt Fluid.

Non-foaming, it resists the

intense heat and pressures

found in PT&T systems to

provide smooth operation and reduced

wear. It’s also excellent for use in

marine power steering systems.

Note: All the items in this catalog are available

through your local authorized Yamaha Marine

Dealer. More information can be found at

YamahaOutboards.com.

Check your lower unit. Your outboard’s lower unit is a vital

component in its overall performance. Simple maintenance

procedures, regularly performed, mean hours of enjoyment

and increased value.

• Check it out. Regularly inspect your lower unit, and

periodically remove the prop and apply marine grease to

the prop shaft. If you notice any entanglement around the

propeller shaft, remove the lower drain plug and check the

color of the lubricant. If it is white or milky in appearance,

water has entered your gearcase. Your lower unit should

be disassembled and inspected, and its seals should be

replaced before using your outboard again.

• Change the gear lube. The extreme pressures exerted inside any

outboard’s lower unit will eventually break down the lubricant’s effectiveness. Using

Yamalube

Gearcase Lube (Gearcase Lube HD for V8 models) according to the schedule in

your owner’s or service manual is one of the best ways to protect your investment. It’s easy

to change the lubricant yourself, or you can have your dealer do it. If you do it yourself,

make sure you also replace the vent and drain screw seals each time.

Lower Unit and

POWER TRIM

TILT

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Yamaha F4C User Manual Page 6

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