Yanmar 2 QM 20 User manual

Your on-the-job Partner
MODEL
2 QM 20
3 QM 30
(F) (Y)
Abma's Ja htwerf
Eeltje Baasweg 4, 8606 KA Sneek.
Tel. 0515 - 419065.
OPERATION MANUAL

CONTENTS
1. Fuel
2. Lubri ating oil
3. Running in
1. Fuel
2. Lubri ating oil
1. Starting
2. Warming up
1. Fuel
2. Lubri ating oil
3. Cooling water
4. Charging
5. Exhaust gas
6. Abnormal sounds
Fresh water ooled engine ooling system handling instru tions
18
Engine Models 2 QM 20 F, 3 QM 30 F (For pleasure boat)
2 QM 20 Y, 3 QM 30 Y (For work boat)
14
16
1 - 15
2
5
7
11
12
III PREPARATION
IV STARTING
INAME OF PARTS
II BEFORE USING THE ENGINE
IX
VII AIR VENTING
VIII PERIODICAL CHECK
V
VI STOPPING
POINTS TO CHECK DURING OPERATION

NAME OF PARTS
I
1.
Exhaust manifold
Thermostat
L.O. supply port ( lut h ase)
Fuel oil strainer
Fuel inje tion pump
Ro ker over
Cooling water pump
F.O. feed pump
Propeller shaft oupling
Oil dipsti k
Speed ontrol lever
Intake silen er
Gear lever
Hoisting bolt
De ompression lever
Exhaust elbow
Clut h ase
Propeller shaft oupling

BEFORE USING THE ENGINE
1.
Fuel
1)
Use high grade diesel oil as fuel.
2)
Never fail to remove any dirt deposits around ap when filling.
Re ommended brands of fuel
Supplier
B.P. Diesel oil
NOTE)
Presen e of water or dust in the fuel may ause
failure of the engine and early wear of the plunger,
fuel inje tion pump, and the fuel inje tion valve nozzle.
Water and dust in the fuel tank should be removed
and lean fuel used.
2.
(Britis h Petroleum)
Shell Diesoline or lo al equivalent
CALTEX
SHELL
MOBIL
ESSO
B.P.
Caltex Diesel oil
Mobil Diesel oil
Esso Diesel oil
Brand Name
II

2.
Lubricating oil
1)
Choose an oil with proper vis osity for the ambient temperature.
2)
In adding lub. oil do not mix different kinds of oil. (brands and/or vis osity)
30
40
30
40
30
40
30
40
RPM Delo Multi-Servi e Oil
20
30
50
Delva Spe ial
20
30
-
Delva 20 W - 40
20W-40
-
-
30
40
30
40
30
40
30
40
30
40
B.P. Energol ICMB
Britis h
B.P. Energol DS-3
Petroleum
50
50
20W 20W 40 50
10W
20
3.
Re ommended brands of lub. oil
Shell Talona Oil
Shell Rimula Oil
Shell Rotella Oil
SHELL
RPM Delo Marine Oil
Estor HD
Esso Lube HD
-
Standard Diesel Oil
10 W. 20/20 W
10 W
20/20 W
20
20
20
SAE NO.
Supplier Brand Name over 35º C
II
below 10º C 10-20ºC
20/20 W
50
50
-
20/20 W
20-35ºC
50
CALTEX
20/20 W, 10 W
MOBIL
10 W
20 W - 40
Delva 1100 Series
Delva 1200 Series
10 W 20
50
50
ESSO
B.P.
10W, 20/20W
10W, 20/20W
20/20 W
20/20 W
10W
-

Amount of lub. oil
odel
Crankcase
Clutch case
3.
Running in
1)
The new engine must be arefully run in during the first 50 hours and not
subje ted to strain.
2)
After the running in period, retighten any important nuts and bolts that
are loose.
II
4.
2 QM 20 5.1 litres 0.5 litres
3 QM 30 7.0 litres 1.2 litres

PREPARATION
1.
Fuel
[1-1]
Fuel tank
1)
Fill the fuel tank
2)
Open the fuel o k.
[1-2]
Checking fuel injection
1)
Set the speed ontrol lever
to the FULL position and the
gear lever in NEUTRAL.
2)
Disengage the de ompression
lever, then turn the starting
handle two or three times and
listen to the sound of fuel
inje tion.
3)
If the proper fuel inje tion
sound annot be heard, refer
to AIR VENTING on page 14.
5.
Fuel tank
F.O. cock
F.O. drain cock
Starting handle
De ompression lever

2.
Lubrication oil
[2-1]
Crankcase/clutch case
1)
Che k the oil level with the
lub. oil dipsti k and add fresh
oil until the level rea hes the
upper mark on the dipsti k.
NOTE)
Avoid both overfilling and
underfilling.
The orre t oil level an be determined
only when the boat is level.
[2-2]
Lubrication of each part
1)
Starter hain
III
6.
Oil dipsti k
Oil dipsti k
Upper marking
Lower marking
Oil dipsti k ( lut h ase)
Oil dipsti k ( rank ase)
L.O. supply port
L.O. supply port
Chain

STARTING
1.
Starting
[1-1] Hand starting
1)
Set the gear lever to NEUTRAL.
2)
Set the speed ontrol lever to FULL.
3)
Disengage the de ompression
lever and turn the starting
handle vigorously 5 or 6 times.
When suffi ient momentum has
been obtained, release the
de ompression lever and further
turn the starting handle firmly.
IV
7.
Gear lever
Full
De ompression lever
Starting handle
Neutral

[1-2]
Electrical starting
1)
Set the gear lever to
NEUTRAL.
2)
Set the speed ontrol lever to
FULL
3)
Turn on the battery swit h.
4)
Turn the starter swit h to
the START position.
5)
Release the starter swit h as soon as the engine starts.
IV
8.
Neutral
Gear lever
Full
Battery swit h
Key swit h

Note)
1.
Do not run the starter motor for more than 10 se onds at a time.
Should the engine fail to start, wait for about 30 se onds before engaging the
starter again.
2.
Do not turn the battery swit h off while the
engine is running.
3.
Be sure to he k that the lub. oil pressure
warning lamp, the ooling water warning
lamp and the harging lamp go out.
4.
When the engine fails to start easily during
old weather operations, disengage the
de ompression lever and turn the starter
swit h to the START position until the
engine gains momentum.
Then release the de ompression lever.
Wiring Diagram
IV
9.

Warming up
2.
Warming up
1)
Run the engine without load for
at least five minutes.
2)
If the engine is running normally,
engage low speed with lut h and
then gradually in rease speed.
Che k points:
Oil leakage
Water leakage
Gas leakage
Abnormal sounds
Lamps (Charging. L.O. warning
and C.W. warning)
IV
10.
Low

POINTS TO CHECK DURING OPERATION
1.
Fuel
1)
Che k the fuel level.
2)
Be sure to add fuel before
the gauge shows emptiness.
2.
Lubricating oil
1)
Che k that the lub. oil pressure
warning lamp is out.
3.
Cooling water
1)
O asionally he k that ooling
water is oming out of the
ooling water outlet.
2)
Che k that the ooling water
warning lamp is out.
4.
Charging
1)
Che k that the battery harging
lamp is out.
5.
Exhaust gas
1)
Che k the olour of the exhaust.
Ex essively bla k exhaust fumes
indi ate that the load is too great
and should be redu ed.
6.
Abnormal sounds
1)
If the engine produ es unusual noises
during operation, stop the engine
immediately and he k it arefully.
V
11.
Charging lamp
Lub. oil pressure warning lamp
C.W. temperature warning lamp
A.C. Generator
V
-
belt

STOPPING
1)
Put the gear lever in NEUTRAL, let the engine idle, then set the speed ontrol
lever to STOP.
NOTE)
Never use the de ompression lever to stop the engine.
VI
12.
Starting handle
Stop
De ompression lever

2)
Turn the fuel o k to the CLOSE position.
3)
If the ooling water is likely to freeze,
owing to the weather or other fa tors,
drain it in the following way.
(1)
Close the kingstone o k
(2)
Open the ooling water drain o ks.
(3)
Remove both inlet and outlet hoses from water pump, then disassemble
the over to dis harge water from inside the water pump.
After following the above pro edure, assemble it as before.
VI
13.
Exhaust manifold
Cooling water drain o k
Cooling water drain o k
Cooling water pump
Cooling water pump over
Impeller