Makita EW2050H User manual

GB Engine pump Instruction Manual
CT
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EW2050H EW2051H
EW3050H EW3051H
Makita Corporation Anjo, Aichi, Japan
www.makita.com




5W
10W
20W
#20
#30
#40
10W-30
10W-40
Single
grade
Multi
grade
Ambient
temperature
-20 -10 0 10 20 30 40 C
-4 14 32 50 68 86 104 F
2
3
4
1
1
5
6
7
2
1
2
3
4
3
1
2
3
4
5 6
7
8
10
918
17
16
15
14
13
19 2422 23 20 21
12 11
1
2
3
1

2
4
35
6
1
2
4
1
5
1
2
3
4
5
7
6
7 8
2
1
3
18 654
1
1
1
2

6
7
8
9
10
1
2
8
3
2
1

1
FOREWORD
Thank you very much for purchasing a MAKITA PUMP.
This manual covers operation and maintenance of MAKITA PUMP.
All information in this publication is based on the latest product information available at the time
of approval for printing. Please read this manual carefully before operating.
Please take a moment to familiarize yourself with the proper operation and maintenance
procedures in order to maximize the safe and efcient use of this product.
Keep this owner’s manual at hand, so that you can refer to it at any time.
Due to constant efforts to improve our products, certain procedures and specications are
subjected to change without notice.
When ordering spare parts, always give us the MODEL, PRODUCTION NUMBER and SERIAL
NUMBER of your pump.
Please ll in the following blanks after checking the production number on your pump.
(Location of label is different depending on the product specication.)
PROD No. SER No.
PROD No. / SER No.
(Label)
SER No. (Stamping)
Please refer to the illustrations on the back page of the front
cover for Fig. to indicated in the sentence.
NOTE
CONTENTS
Page
1. SAFETY PRECAUTIONS .............................................2
2. COMPONENTS .....................................................4
3. PRE-OPERATION FOR STARTING .....................................5
4. OPERATING YOUR PUMP ............................................6
5. MAINTENANCE ....................................................6
6. PREPARATIONS FOR STORAGE ......................................9
7. OIL SENSOR INSTRUCTIONS .........................................9
8. EASY TROUBLESHOOTING .........................................10
9. SPECIFICATIONS ..................................................11
English (Original instructions)

2
1. SAFETY PRECAUTIONS
Please make sure you review each precaution carefully.
Pay special attention to statement preceded by the following words.
“WARNING” indicates a strong possibility of severe personal injury or loss of life
if instructions are not followed.
“CAUTION” indicates a possibility of personal injury or equipment damage if
instructions are not followed.
: EXHAUST PRECAUTIONS
■ Never inhale exhaust gasses.
They contain carbon monoxide, a colorless, odorless and extremely
dangerous gas which can cause unconsciousness or death.
■ Never operate the pump indoors or in a poorly ventilated area, such as
tunnel, cave, etc.
■ Exercise extreme care when operating the pump near people or animals.
■ Keep the exhaust pipe free of foreign objects.
: REFUELING PRECAUTIONS
■ Fuel is extremely ammable and its vapors can explode if ignited.
■ Do not refuel indoors or in a poorly ventilated area.
■ Be sure to stop the pump prior to refueling.
■ Do not remove fuel tank cap nor ll fuel tank while engine is hot or running.
Allow engine to cool at least 2 minutes before refueling.
■ Do not overll the fuel tank.
■ If fuel is spilt, wipe it away carefully and wait until the fuel has dried before
starting the engine.
■ After refueling, make sure that the fuel cap is secured to prevent spillage.
: FIRE PREVENTION
■ Do not operate the pump while smoking or near an open ame.
■ Do not use around dry bush, twigs, cloth rags, or other ammable
materials.
■ Keep cooling air intake (recoil starter area) and mufer side of the engine
at least 1 meter (3 feet) away from buildings, obstructions and other
burnable objects.
■ Keep the pump away from ammables and other hazardous materials
(trash, rags, lubricants, explosives).
: OTHER SAFETY PRECAUTIONS
■ Do not allow drunk driving.
■ Be careful of hot parts.
The mufer and other engine parts become very hot while the pump is
running or just after it has stopped. Operate the pump in a safe area and
keep children away from the running pump.
WARNING
CAUTION
WARNING
WARNING
WARNING
WARNING
1m
1m

3
■ Do not touch the ignition cable when starting and operating the engine.
■ Operate the pump on a stable, level surface.
If the engine is tilted, fuel spillage may result.
NOTE
Operating the pump at a steep incline may cause seizure due to
improper lubrication even with a maximum oil level.
■ Do not transport the pump with fuel in tank or with fuel strainer valve open.
■ Keep the unit dry (do not operate it in rainy conditions).
: PRE-OPERATION CHECKS
■ Carefully check fuel hoses and joints for looseness and fuel leakage.
Leaked fuel creates a potentially dangerous situation.
■ Check bolts and nuts for looseness. A loose bolt or nut may cause serious
engine trouble.
■ Check the engine oil and rell if necessary.
■ Check the fuel level and rell if necessary. Take care not to overll the
tank.
■ Keep cylinder ns and recoil starter free of dirt, grass and other debris.
■ Wear snug tting working clothes when operating the engine.
Loose aprons, towels, belt, etc., may be caught in the engine or drive train,
causing a dangerous situation.
: BEWARE OF WATER-HAMMERING
■ Do not allow the delivery hose to be trampled over by a vehicle’ s wheel, or
do not close the delivery valve abruptly otherwise a water-hammer occurs
which may result heavy damage to the pump.
Trampling over the delivery hose Abrupt closing of delivery valve
WARNING
CAUTION

4
SYMBOLS
Read manual. Shut off fuel valve
when the engine is not in use.
Stay clear of the hot surface. Check for leakage
from hose and ttings.
Exhaust gas is poisonous.
Do not operate in an unventilated
room or enclosed area.
Fire, open ame and smoking
prohibited.
Stop the engine before
refueling.
HOT, avoid touching the hot area.
On (Run) Engine start
(Electric start) Fuel (gasoline) Primer
Off (Stop) Engine stop
D
Fuel (diesel) Push primer
Engine oil Cold engine Fuel shut-off Do not push primer
Add oil Warm engine
Fuel system
failure / malfunction
Two times
Battery Electrical preheat
(Low temperature start aid)
Choke
Fast Run position Plus ;
positive polarity
Slow Stop position Minus ;
negative polarity
2. COMPONENTS
(See Fig. )
Please refer to the illustrations on the back page of the front
cover or back cover for Fig. to indicated in the sentence.
Plug (drain)
Suction
Delivery
Frame
Plug (priming)
Mufer
Spark plug
Oil ller (with oil guage)
Fuel tank
Casing cover
Drain plug (at two places)
Stop Switch
Recoil starter
Recoil Starter handle
Fuel valve
Chocke lever
Air cleaner
Speed control lever
Strainer
Hose coupling
Hose band
Tools
Instruction for use
(This publication)
Hexagon wrench
(Semi trash pump only)
NOTE

5
3. PRE-OPERATION FOR STARTING
(See Fig. )
1. CONNECT SUCTION HOSE (See Fig. - )
Use a reinforced-wall or wire braided hose to prevent
suction collapse. Since the pump self-priming time is
directly proportional to hose length, a short hose is
recommended.
CAUTION
Always use a strainer with the suction hose.
Gravel or debris sucked into the pump will
cause serious damage to the impeller and
the pump casing.
2. CONNECT DELIVERY HOSE (See Fig. - )
When using a fabric hose, always use a hose band
to prevent the hose from disconnecting under high
pressure.
3. CHECK ENGINE OIL (See Fig. - )
Before checking or relling engine oil, be sure the
engine is located on stable, level surface and stopped.
■ Do not screw the oil gauge into the oil ller neck
to check oil level. If the oil level is low, rell to the
upper level with the following recommended oil.
■ Use 4-stroke automotive detergent oil of API
service class SE or higher grade (SG, SH or SJ is
recommended).
■ Select the viscosity based on the air temperature at
the time of operation as shown in the table.
(See Fig. - )
Explanation of Fig. -
Oil Gauge Upper Level
Lower Level
Model Oil capacity
EW2050H
EW3050H
EW2051H
EW3051H
0.6 L
4. CHECK FUEL (See Fig. - )
WARNING
■Do not refuel while smoking, near an open
ame or other such potential re hazards.
Otherwise re accident may occur.
■Remove the statistic electricity from your
body before relling the gasoline.
Sparking from electrostatic discharge may
cause the ignition to the vaporized fuel
(gasoline) resulting burns.
Static electricity can be discharged from the
body by touching by hand the metal parts of
the unit and the fuel dispensing pump.
NOTE
THIS ENGINE IS CERTIFIED TO OPERATE
ON AUTOMOTIVE UNLEADED GASOLINE.
■ Stop the engine and open the cap.
■ Use automotive unleaded gasoline only.
● Unleaded regular/premium or reformulated
gasoline containing no more than 10% Ethanol
(E10), or 15% MTBE may also be used.
● Never use gasoline containing ethanol exceeding
10%, or MTBE exceeding 15% because engine
or fuel system damage could result.
● Never use stale or contaminated gasoline.
● Use of these non-recommended fuels may result
in reduced performance and/or denial of warranty.
Fuel Tank Capacity
Model Fuel Tank capacity
Litre (U.S.gal)
EW2050H
EW3050H
EW2051H
EW3051H
3.2 (0.85)
■ Close the fuel valve before lling the fuel tank.
■ Do not ll above the top of the fuel lter screen
(marked ), or the fuel may overow when it heats
up later and expands.
Explanation of Fig. -
Maximum Fuel level
■ When lling the fuel tank, always use the fuel lter
screen.
■ Reattach the fuel cap by turning clockwise until
reaching the physical stop (about one quarter turn).
Do not attempt to turn past the physical stop or the
fuel cap may be damaged.
■ Wipe off any spilled fuel before starting the engine.
(See Fig. - )

6
5. CHECK PRIMING WATER (See Fig. - )
It is recommended that the water chamber of pump
casing should be primed with full of water before
operating.
WARNING
Never attempt to operate the pump without
priming water or the pump will overheat.
Extended dry operation will destroy the
mechanical seal.
If the unit has been operated dry, stop the
engine immediately and allow the pump to
cool before adding priming water.
4. OPERATING YOUR PUMP
1. STARTING (See Fig. )
(1) Open the fuel valve. (See Fig. - )
(2) Turn the STOP SWITCH to the position “ I ” (ON).
(See Fig. - )
(3) Set the speed control lever 1/3 of the way towards
the high speed position. (See Fig. - )
(4) Close the choke lever. (See Fig. - )
■ If the engine is cold or the ambient temperature is
low, close the choke lever fully.
■ If the engine is warm or the ambient temperature
is high, open the choke lever half-way, or keep it
fully open.
(5) Pull the starter handle slowly until resistance is felt.
This is the “compression” point. Return the handle
to its original position and pull swiftly. Do not pull out
the rope all the way. After starting the engine, allow
the starter handle to return to its original position
while still holding the handle. (See Fig. - )
(6) After starting the engine, gradually open choke
by turning the choke lever and nally keep it
fully opened. Do not fully open the choke lever
immediately when the engine is cold or the ambient
temperature is low, because the engine may stop.
(See Fig. - )
2. RUNNING (See Fig. )
(1) After the engine starts, set the speed control lever
at the low speed position (L) and warm it up without
load for a few minutes. (See Fig. - )
(2) Gradually move the speed control lever toward the
high speed position (H) and set it at the required
engine speed. (See Fig. - )
■ Whenever high speed operation is not required,
slow the engine down (idle) by moving the speed
control lever to save fuel and extend engine life.
3. STOPPING (See Fig. )
(1) Set the speed control lever at the low speed
position and allow the engine to run at low speed
for 1 or 2 minutes before stopping. (See Fig. - )
(2) Turn the STOP SWITCH counterclockwise to the
position “ ” (OFF). (See Fig. - )
(3) Close the fuel valve. (See Fig. - )
(4) Pull the starter handle slowly and return the handle
to its original position when resistance is felt. This
operation is necessary to prevent outside moist air
from intruding into the combustion chamber.
(See Fig. - )
STOPPING ENGINE WITH THE FUEL VALVE
Close the fuel valve and wait for a while until the engine
stops. Avoid to let the fuel remain in the carburetor over
long periods, or the passages of the carburetor may
become clogged with impurities, and malfunctions may
result.
5. MAINTENANCE
(See Fig. )
1. DAILY INSPECTION
Before running the engine, check the following service
items.
Loose or broken bolts and nuts
Clean air cleaner element
Enough clean engine oil
Leakage of gasoline and engine oil
Enough gasoline
Safe surroundings
Check the priming water
Excessive vibration, noise

7
2. PERIODIC INSPECTION
Periodic maintenance is vital to the safe and efcient
operation of your pump.
Check the table below for periodic maintenance
intervals.
The below chart is based on the normal product
operation schedule.
CAUTION
Replace rubber pipes for fuel passage every
two years. If fuel leakage is found, replace
the pipe immediately.
Periodic Maintenance Schedule table
Maintenance Items Every 8 hours
(Daily)
Every 50 hours
(Weekly)
Every 200 hours
(Monthly)
Every
300 hours
Every
500 hours
Every
1000 hours
CLEAN PUMP SET AND CHECK BOLTS
AND NUTS ● (Daily)
CHECK FOR LEAKAGE FROM HOSES
AND FITTING ● (Daily)
CHECK AND REFILL ENGINE OIL ● (Rell daily up to upper level)
CHANGE ENGINE OIL ● (Initial
20 hours) ● (Every 100 hours)
CLEAN SPARK PLUG ● (Every
100 hours)
CLEAN AIR CLEANER ●
REMOVE THE PUMP CASING AND
CLEAN ●
CLEAN FUEL STRAINER ●
CLEAN AND ADJUST SPARK PLUG
AND ELECTRODES ●
CHECK AND ADJUST VALVE
CLEARANCE ●
REMOVE CARBON FROM CYLINDER
HEAD ●
CLEAN AND ADJUST CARBURETOR ●
REPLACE FUEL HOSE ● (Every
2 years)
OVERHAUL ENGINE IF NECESSARY ●
3. INSPECTING THE SPARK PLUG
(See Fig. - )
(1) Clean off carbon deposits on the spark plug electrode using a plug cleaner or wire brush.
(2) Check electrode gap. The gap should be 0.6 mm to 0.7 mm (0.02 inch.-0.03 inch.).
Adjust the gap, if necessary, by carefully bending the side electrode.
Recommended Spark Plug:
E6RC (TORCH) or BR-6HS (NGK)

8
4. ENGINE OIL CHANGE (See Fig. - , )
Initial oil change : After 20 hours of operation
Thereafter : Every 100 hours of operation
(1) When changing oil, stop the engine and loosen the
drain plug. Drain the used oil while the engine is
warm. Warm oil drains quickly and completely.
CAUTION
To prevent injury, pay attention to the hot oil.
Make sure the fuel cap is tightly secured to
avoid spillage.
(2) Re-install the drain plug before relling oil.
Model Oil capacity
EW2050H
EW3050H
EW2051H
EW3051H
0.6 L
(3) Refer to page 5 for the recommended oil.
■ Always use the best grade and clean oil.
Contaminated oil, poor quality oil and shortage of
oil cause damage to engine or shorten the engine
life.
5. CLEANING FUEL CUP (See Fig. - )
WARNING Flame Prohibited
WARNING
Remove the statistic electricity from your
body before relling the gasoline.
Sparking from electrostatic discharge may
cause the ignition to the vaporized fuel
(gasoline) resulting burns.
Static electricity can be discharged from the
body by touching by hand the metal parts
of the unit.
(1) Inspect fuel cup for water and dirt.
(See Fig. - - )
(2) To remove water and dirt, close the fuel valve and
remove the fuel cup.
(3) After removing dirt and water, wash the fuel cup
with kerosene or gasoline. Reinstall securely to
prevent leakage.
6. CLEANING AIR CLEANER
(See Fig. - )
A dirty air cleaner element will cause starting difculty,
power loss, engine malfunctions, and shorten engine
life extremely.
Always keep the air cleaner element clean.
WARNING Flame Prohibited
■ Urethane Foam cleaning (See Fig. - - )
Wash and clean the urethane foam with detergent.
After cleaning, dry it. Clean the urethane foam
element every 50 hours.
■ Second element (See Fig. - - )
Clean by tapping gently to remove dirt and blow
off dust. Never use oil. Clean the paper element
every 50 hours of operation, and replace element
set every 200 hours.
NOTE
Clean and replace air cleaner elements more often
when operating in dusty environments. Replace the
element in case that dirt or dust can not be removed
and/or that the element is deformed or deteriorated.
7. FUEL HOSE REPLACEMENT
(See Fig. - )
WARNING
■Take extreme caution when replacing fuel
hose; gasoline is extremely ammable.
■Remove the statistic electricity from your
body before relling the gasoline.
Sparking from electrostatic discharge may
cause the ignition to the vaporized fuel
(gasoline) resulting burns.
Static electricity can be discharged from
the body by touching by hand the metal
parts of the unit.
Replace the fuel hose every 1,000 hours or every 2
years.
If fuel leaks from fuel hose, replace the fuel hose
immediately.
8. CHECKING BOLTS, NUTS AND SCREWS
■ Retighten loose bolts and nuts.
■ Check for fuel and oil leaks.
■ Replace damaged parts with new ones.

9
9. CLEANING PUMP INSIDE
(See Fig. - –)
(Except EW2050H, EW3050H)
If the inside of the pump is plugged up with small rocks
or if the inside of the pump has to be cleaned, you can
clean the inside of the pump by removing the casing
cover using the Hexagon wrench that comes with the
pump.
The accessory Hexagon wrench (8 mm) is attached to
the upper part of the casing. (See Fig. - )
(1) Removal of the casing cover (See Fig. - )
Remove the 4 socket bolts.
(2) Cleaning the inside of the pump (See Fig. - )
After removing the pebbles and dirt from the inside
of the pump, rinse it out with clean water.
Explanation of Fig. -
Casing cover O-Ring
Make sure not to damage the O-ring as this will cause
water leakage.
If the O-ring is deteriorated or damaged, replace it with
a new one.
(3) Reattaching the casing cover (See Fig. - )
Tighten the 4 socket bolts.
6. PREPARATIONS FOR STORAGE
1. WATER (See Fig. - )
Drain all water from the drain plug.
CAUTION
When retightening drain plug, be sure to
clean the drain plug and the thread of casing.
Otherwise, the thread may be damaged.
2. DISCONNECT THE DELIVERY HOSE
Tilt the pump and drain all water from delivery hole.
Severe damage to pump may result if water freezes in
the pumping chamber.
3. DISCHARGE FUEL
(See Fig. - )
WARNING Flame Prohibited
If you do not use the engine more than 1 month,
discharge fuel to prevent gum in the fuel system and
carburetor parts.
WARNING
■Remove the statistic electricity from your
body before relling the gasoline.
Sparking from electrostatic discharge may
cause the ignition to the vaporized fuel
(gasoline) resulting burns.
Static electricity can be discharged from
the body by touching by hand the metal
parts of the unit.
■Always store/carry the fuel (gasoline) with
metallic portable tank to prevent re.
■ Remove the strainer cup, place the strainer over a
container and open the strainer valve to discharge
fuel from the fuel tank.
■ Remove the drain screw of the carburetor oat
chamber and discharge fuel.
4. ENGINE OIL (See Fig. - )
■ Change the engine oil with fresh oil.
■ Remove the spark plug, pour about 5 cc of engine
oil into the cylinder, slowly pull the starter handle
of the recoil starter 2 or 3 times, and reinstall the
spark plug.
5. CLEAN AND STORE
■ Slowly pull the recoil starter handle until resistance
is felt and leave it in that position.
■ Clean the pump thoroughly with an oiled cloth, put
the cover on, and store the pump indoors in a well
ventilated, low humidity area.
7. OIL SENSOR INSTRUCTIONS
1. FUNCTION OF OIL SENSOR
The engine will stop automatically when the oil level
falls below the safety limit. The engine cannot be
started unless the level is raised above the prescribed
limit. (See Fig. - )
2. RESTARTING
(1) Fill the crankcase with oil up to the proper level.
(2) As for restarting and operating the engine, refer to
section “4. OPERATING YOUR PUMP” on page 6.
■ Check the wire connector from the engine. It must
be connected securely to the wire from oil sensor.
■ When selecting the engine oil, refer to page 5 for
the recommended oil.

10
8. EASY TROUBLESHOOTING
1. PUMP DOES NOT RUN.
■ Engine dose not start.
(See “8.-6. WHEN ENGINE DOES NOT START”)
■ Sticking of impeller (Disassemble and clean.)
2. PUMPING VOLUME IS SMALL.
■ Sucking air at suction side.
(Check piping at suction side.)
■ Drop off engine output.
(Consult your nearest dealer.)
■ Breakage of mechanical seal.
(Consult your nearest dealer.)
■ High suction lift (Lower.)
■ Suction hose is too long or thin.
(Use a thick hose in minimum length.)
■ Leak of water from water passage. (Stop leaking.)
■ Clogging of foreign substance in impeller.
(Disassemble and clean.)
■ Wear of impeller.
■ Strainer is clogged. (Clean.)
■ Engine speed is too low.
(Consult your nearest dealer.)
3. PUMP DOES NOT SELFPRIME.
■ Suction of air at suction side.
(Check piping at suction side.)
■ Insufcient priming water inside pump casing.
(Prime fully.)
■ Imperfect tightening of drain plug.
(Tighten the plugs completely.)
■ Engine speed is too low.
(Consult your nearest dealer.)
■ Sucking air from mechanical seal.
(Consult your nearest dealer.)
4. DELIVERY HOSE DOES NOT STAY ON
COUPLING.
■ Hose may be kinked or discharge end may be
blocked or clogged. (Straighten or clean.)
5. PUMP SUDDENLY STOPS.
■ Solid object preventing pump-rod from completing
stroke. (Disassemble and clean.)
6. WHEN ENGINE DOES NOT START:
Perform the following checks before you take the pump
to your Makita dealer. If you still have trouble after
completing the checks, take the pump to your nearest
Makita dealer.
(1) Is there a strong spark across the electrode?
■ Is the stop switch at position “ I ” (ON)?
■ Remove and inspect the spark plug.
If the electrode is fouled, clean or replace it with
new one.
■ Remove the spark plug and connect it to the plug
cap. Pull the starter handle while grounding spark
plug against engine body. Try with a new spark plug
if the spark is weak or there is no spark.
The ignition system is faulty if there is no spark with
a new spark plug.
WARNING
■Wipe out spilled fuel carefully before
testing. Place spark plug as far away from
spark plug hole as possible.
■Do not hold spark plug by hand while
pulling recoil starter.
NOTE
The engine with oil sensor will stop automatically
when the oil level falls below the prescribed limit.
Unless the oil level is raised above the prescribed
limit, the engine will stop immediately after starting.
(2) Is there enough compression?
Pull the starter handle slowly and check if
resistance is felt.
If little force is required to pull the starter handle,
check if the spark plug is tightened rmly. If the
spark plug is loose, tighten it.
(3) Is the spark plug wet with gasoline?
■ Is the fuel valve opened?
■ Choke (close choke lever) and pull the starter
handle ve or six times. Remove the plug and
check if its electrode is wet. If the electrode is wet,
fuel is well supplied to your engine.
■ When the electrode is dry, check where the fuel
stops. (Check the fuel intake of the carburetor.)
■ In case the engine does not start with well supplied
fuel, try using fresh fuel.

11
9. SPECIFICATIONS
Model EW2050H EW3050H EW2051H EW3051H
PUMP
Type Self-priming, Centrifugal pump Self-priming, Semi Trash pump
Suction × Delivery Diameters mm 50 × 50 76 × 76 50 × 50 76 × 76
Total Head m 32 23
Maximum Delivery Volume
Liter/min 520 1000 700 1000
Suction Head m 8.0
Axle Seal Material
(Mechanical Seal) Ceramic - carbon Silicon - carbide
ENGINE
Model EX16 EX17 EX16 EX17
Type Air-Cooled, 4-cycle, OHC, Gasoline Engine
Lubricant Automotive detergent oil
(API / SE or higher grade, SG, SH or SJ is recommended. SAE / 10W-30 etc.)
Oil Capacity Liter 0.6
Fuel Automotive unleaded gasoline
Fuel Tank Capacity Liter 3.2
Spark plug TORCH E6RC or NGK BR-6HS
Starting system Recoil starter
Dimensioms (L × W × H) mm 527 × 368 × 417
Net Weight kg 24.9 26.1 24.9 26.1
Standard accessories Engine tool kit (1 set), Strainer (1 pc.),
Hose coupling (2 set),
Hose band (3 pcs.),
Instruction for use (1 pc.)
Engine tool kit (1 set), Strainer (1 pc.),
Hose coupling (2 set),
Hose band (3 pcs.),
Instruction for use (1 pc.),
Hexagon wrench (1 pc.)
• Specications are subject to change without notice.

12
前言
非常感謝您購買 MAKITA 幫浦。
本說明書涵蓋 MAKITA 幫浦的操作與保養。
本文件中的所有資訊都是以准許印刷時所能得到的最新產品資訊為根據。操作前請仔細閱讀本
手冊。
請花一點時間熟悉正確的操作與保養程序，以便讓本產品達到最高的安全性與有效使用。
請將本使用說明書保存在手邊，以便隨時參考。
由於持續努力改善我們的產品，某些程序與規格可能會變更而不事先通知。
訂購零件時，務必要將幫浦的 型號、產品號碼 以及 序號 提供給我們。
請在查看幫浦上的產品號碼之後填入下列空格中。
(標籤的位置會因產品規格而異。)
PROD No. SER No.
產品號碼 / 序號
（標籤）
序號 (戳記)
關於文句中提到的圖 至 ，請參考封面背頁上的圖解。
附註
內容
頁數
1.安全注意事項............................................................ 13
2.組件.................................................................... 15
3.起動前的準備............................................................ 16
4.操作幫浦................................................................ 17
5.保養.................................................................... 17
6.準備存放................................................................ 20
7.機油感應器說明.......................................................... 20
8.輕鬆地排解疑難.......................................................... 20
9.規格.................................................................... 22
繁體中文 (原始說明書)

13
1.安全注意事項
請務必仔細閱讀各個注意事項。
尤其要注意前面有下列字詞的陳述。
“警告”表示如果不遵守指示，很有可能會有嚴重的人員傷害或生命損失。
“注意”表示如果不遵守指示，可能會有人員傷害或設備損壞。
：廢氣注意事項
■切勿吸入廢氣。
廢氣含有一氧化碳，這是一種無色無臭而且非常危險的氣體，可能令人失
去知覺或者死亡。
■切勿在室內或通風不良的區域如隧道、洞穴等場所操作幫浦。
■在靠近人或動物的地方操作幫浦時要非常小心。
■排氣管不能有異物。
：加油注意事項
■燃油非常易燃，如果被點燃，油氣可能會爆炸。
■不要在室內或通風不良的地區加油。
■加油之前務必要停止幫浦。
■不要在引擎很熱或者正在運轉時取下燃油箱蓋或對燃油相加油。
加油之前要讓引擎冷卻至少 2 分鐘。
■燃油箱不要加得過滿。
■如果燃油溢出來，請仔細地將其擦掉，並等到燃油乾掉之後才起動引擎。
■加油之後，要確認燃油蓋有蓋緊以免溢出來。
：防止火災
■請不要在吸煙時或靠近明火時操作幫浦。
■請不要在乾燥的灌木叢、樹枝、碎布或者其他易燃物附近使用。
■引擎的冷卻風進氣口 (捲揚式起動器區) 與消音器端至少
要距離建築物、障礙物與其他可燃物 1 公尺遠。
■幫浦要遠離易燃物與其他危險物品 (垃圾、碎布、潤滑劑、爆裂物)。
：其他安全注意事項
■請不要容許醉駕。
■小心灼熱的零組件。
幫浦運轉時或者剛停止時，消音器與其他引擎零組件會變得非常熱。請在
安全地區操作幫浦，而且要讓孩童遠離運轉中的幫浦。
警告
注意
警告
警告
警告
警告
1m
1m

14
■起動與操作引擎時，不要觸摸點火纜線。
■請在穩定的水平表面操作幫浦。
如果引擎傾斜，燃油可能會溢出來。
附註
如果在陡坡操作幫浦，即使在機油液位最高的情況下也可能會因為
潤滑不當而造成熄火。
■請不要在油箱中有燃油或者燃油過濾器閥門開啟的情況下運送泵浦。
■請讓本機保持乾燥(不要在下著雨的環境中操作)。
：操作前的檢查
■請仔細檢查燃油管與接頭是否有鬆脫或漏油。漏油會造成潛在的危險情
況。
■檢查螺栓與螺帽是否有鬆動。鬆動的螺栓與螺帽可能會造成嚴重的引擎問
題。
■檢查機油，如果有必要請加油。
■檢查燃油液面，如果有必要請加油。小心油箱不要加太滿。
■汽缸散熱片與捲揚式起動器上不能有泥土、雜草以及其他碎屑。
■操作引擎時，要穿著合身的工作服。
寬鬆的圍裙、毛巾、腰帶等可能會被引擎或傳動系統夾住而造成危險的情
況。
：注意水鎚效應
■不要讓輸水管被汽車輪子碾壓過去，或者突然關閉送輸水閥門，否則產生
的水鎚效應可能會對幫浦造成嚴重的傷害。
碾壓輸水管 突然關閉輸水閥門
警告
注意

15
符號
閱讀說明書。 引擎沒在使用時
請關閉燃油閥門。
請遠離灼熱的表面。 檢查軟管與配件是否有洩漏。
廢氣有毒。
請不要在不通風的房間或密閉地
區操作。
嚴禁火焰、明火與吸煙。
加油前要停止引擎。 灼熱，避免觸摸灼熱的區域。
開 (運轉) 引擎起動 (電動) 燃油 (汽油) 起動泵
關 (停止) 引擎停止
D
燃油 (柴油) 按起動泵
機油 冷引擎 燃油關閉 不要按起動泵
加油 暖引擎 燃油系統
失誤/故障 兩倍
電池 電預熱
(低溫起動輔助)
阻風門
快速 運轉位置 ＋;
正極
緩速 停止位置 ─;
負極
2.組件
(請參閱圖 )
關於文句中提到的圖 至 ，請參考封面背頁上的圖解。
排水栓
吸入
排出
外框
注水栓
消音器
火星塞
機油注入口 (有機油量尺)
燃油箱
機殼蓋
排放栓 (兩處)
停止開關
捲揚式起動器
捲揚式起動器把手
燃油閥門
阻風門控制桿
空氣濾清器
速度控制桿
過濾器
軟管連接器
軟管夾圈
工具
使用說明
(本文件)
六角扳手
(僅限於污水幫浦)
附註

16
3.起動前的準備
(請參閱圖 )
1. 連接吸水管 (請參閱圖 - )
請使用有強化管壁的軟管或有編織鋼絲支撐的軟管，以
防止吸入坍陷。由於幫浦的自吸時間與管長直接成比
例，建議使用短管。
注意
吸水管一定要使用過濾器。被吸入幫浦的砂石
或碎屑會對葉輪與幫浦外殼造成嚴重損壞。
2. 連接輸水管 (請參閱圖 - )
使用有編織襯裡的軟管時務必要用管夾，以防止軟管在
高壓下脫落。
3. 檢查機油 (請參閱圖 - )
檢查或添加機油之前，要確認引擎是位於穩定、水平的
表面，而且是停止的。
■不要用將機油量尺旋入注油頸的方式檢查機油液
面。如果機油液面很低，請用下列推薦的機油將液
面補充到上限處。
■請使用 API 服務等級為 SE 或更高等級 (建議使用
SG、SH 或 SJ) 的 4 行程清淨型車用機油。
■請如表中所示，根據操作時的氣溫選擇黏稠度。
(請參閱圖 - )
圖 - 的解釋
機油量尺 上液面
下液面
型號 機油容量
EW2050H
EW3050H
EW2051H
EW3051H
0.6 L
4. 檢查燃油 (請參閱圖 - )
警告
■請不要在吸煙時、靠近明火處或者有其他這類
潛在火災風險處加油。否則可能會發生火災
意外。
■添加汽油之前要將身上的靜電消除。
來自靜電放電的火花可能會點燃氣化的燃油
(汽油) 而造成燒傷。
用手觸摸本機與加油幫浦的金屬部分便可以釋
放身上的靜電。
附註
本引擎經過認證，可以用汽車用的無鉛汽油操
作。
■停止引擎並打開蓋子。
■只能使用車用無鉛汽油。
●沒有加鉛的普通/高級或未經過配方處理的汽油，
包含的乙醇 (E10) 要低於 10%，MTBE 低於 15%
的也可以使用。
●切勿使用包含的乙醇超過 10%、或者 MTBE 超過
15% 的汽油，因為可能會造成引擎或燃油系統損
壞。
●切勿使用變質或受污染的汽油。
●使用這些不建議使用的燃油可能會造成效能降低
和/或不予保固。
燃油箱容量
型號 燃油箱容量
公升
EW2050H
EW3050H
EW2051H
EW3051H
3.2
■為燃油箱加油之前要關閉燃油閥門。
■加油不要超過燃油濾清器濾網 (標示為 )頂端，
否則稍後燃油升溫並膨脹時可能會溢出來。
圖 - 的解釋
最高燃油液面
■為燃油箱加油時，一定要使用燃油濾清器。
■以順時針方向轉動到實質停止點（約四分之一圈）
的方式將燃油蓋裝回去。請勿轉到超過實質停止
點，否則燃油蓋可能會受損。
■起動引擎之前要將所有溢出的燃油擦乾淨。(請參
閱圖 - )
5. 檢查引水 (請參閱圖 - )
建議操作前幫浦機殼的水室應該注滿引水。
警告
切勿在沒有注入引水的情況下操作幫浦，否則
幫浦會過熱。長時間乾燥操作會毀了機械軸封。
如果本機曾經乾燥操作過，請立即停止引擎，
並在幫浦冷卻之後再加注引水。