Engine - Yanmar SV26 User Operation And Maintenance Manual

16 Detecting anomalies

16.2.1 Engine

Problem
Cause
Vapour comes
Lack of cooling water.
out of the
radiator.
Build up of dust and tartar in the
cooling circuit.
Defective thermostat.
The water tem-
perature alarm
Raditator blade blocked or twisted.
light comes on.
Defective electric circuit.
The starter works Lack of fuel.
correctly but the
Air in the fuel circuit.
engine does not
start.
Defective fuel injection pump or in-
jector performance altered.
Inadequate compression.
Blown fuse.
Stop solenoid damaged. Broken
filament.
Black smoke es- Air filter element blocked.
capes from the
Altered injector performances.
machine.
Inadequate compression.
The smoke is Too much oil in the oil casing.
white or blue-
white.
Inadequate fuel.
Piston or segment used.
120
Ventilator belt slack.
Solution
Check the cooling water level. If
necessary, top up the water. (Check
any water leaks on and around the
filling hole).
Adjust the belt tension.
Drain the cooling circuit, clean it
completely and fill it again.
Replace the thermostat.
Clean or repair the blade.
Check or replace the electric circuit.
Top up the fuel tank.
Repair the air leak. (Evacuate the air
from the fuel circuit).
(Replace the pump or the injector).
(Check and repair).
Replace the fuse.
(Check and repair).
Clean or repair the element.
(Check and repair).
(Check and repair).
Drain the oil from the casing to the
specified level.
Replace the fuel with a recom-
mended fuel.
(Repair).