After The Engine Has Started; Adjusting The Engine Speed - Yanmar 4JH3-TE Operation Manual

28 4. HOW TO OPERATE

4.3.4 After the Engine has Started

(1) Warming-up running
After the engine has started, let it run for about 5 minutes. This warms up the engine and distributes oil to all
of the parts.
NOTICE:
The engine will seize if it is operated when cooling seawater discharge is too small or if load
is applied without any warming up operation.
♦Morse Remote Control Handle (If having the optional)
1. Leave the remote control handle in NEUTRAL.
2. Pull out the handle lever (MT-3) or the free throttle
button (MV) and adjust the speed to no more than
1500 rpm and run the engine at low speed with no
load.
(2) Checking for problems
While warming up the engine, check the following items.
1. Check that the meters and alarm devices on the instrument panel are normal.
2. Check for water, fuel and oil leakage from the engine and marine gear.
3. Check that exhaust color, engine vibrations and sound are normal.
4. Check that sufficient cooling water is discharged from the seawater outlet pipe.
Operation with too little seawater discharge will burn the impeller of the seawater pump.
If seawater discharge is too small, stop the engine immediately, identify the cause and repair
• Is the Kingston cock open?
• Is the inlet of the Kingston cock clogged?
• Is the seawater suction hose broken, or does the hose suck in air due to a loose joint?

4.4 Adjusting the Engine Speed

Adjust the speed of the engine by moving the remote control handle slowly and smoothly.
Move the handle forward and adjust the speed between L(low speed) and H(high speed).
♦For the Morse remote control handle, adjust the engine speed between NEUTRAL and ∆FWD or NEUTRAL
and ∇REV.
NOTICE:
For a new engine be especially careful not to change speeds abruptly or attach a heavy
load for the first 50 hours of operation. Doing so will result in damage and shorten the life of
the engine.
NEUTRAL
→See 2.5.2(4)
MT-3
Pull out handle lever
Pull out free throttle button.
MV
NEUTRAL
Free throttle button