SUZHOU PARSUN POWER MACHINE F2.6BM User manual

PARSUN OUTBOARD ENGINE
SERVICE MANUAL
F2.6BM
SUZHOU PARSUN POWER MACHINE CO., LTD.

NOTICE
This manual includes service instructions for F2.6 and has been prepared by Parsun
Power primarily for use by the dealers when performing maintenance and repair to
Parsun outboard engines. Before performing maintenance, please read the manual
carefully. When performing maintenance and repair to Parsun outboard engines, please
use the service procedure and tools recommended by the manual. If you use other
service procedure and tools, please follow guidance from experienced maintenance
people, to avoid damage to people and outboard engines.
The manual is based on the sample machines that are produced at the time of printing, so
the model being actual purchased may differ a little from the descriptions and
illustrations given in this manual. If necessary, our company will distribute the manual
revision to dealers.
In this Service Manual, particularly important information is distinguished in the
following ways, please ready the manual carefully, and perform the instructions
correctly and carefully.
WARNING:
Failure to follow WARNING instructions could result in severe injury or death to the
machine operator and bystander.
CAUTION:
A CAUTION indicates special precautions that must be taken to avoid damage to the
outboard motor.
NOTE:
A NOTE provides key information to make procedures easier or clearer.
The common troubles and solutions are given in the end of the manual, please ready
carefully. When performing maintenance and repair to Parsun outboard engines, they
will help you judge the outboard engine’s status quickly and improve the work efficiency.
All rights reserved.
This manual cannot be reproduced or
transmitted in any form or by any means
without the written approval of our
company.
Suzhou Parsun Power Machine Co., Ltd.

INDEX
GENERAL INFORMATION··········································1
IDENTIFICATION·
············································1
PROPELLER SELECTION·····································1
EMERGENCY START··········································1
SAFETY WHILE WORKING···································3
DISASSEMBLY AND ASSEMBLY·
·······························4
ONE-TIME USE PARTS·
········································4
PRE-DELIVERY CHECK······································4
SPECIAL TOOLS AND DETECTION DEVICE·····················6
EXPLOSIVE DRAWING AND SYMBOL···························8
SPECIFICATIONS················································9
OUTBOARD ENGINE SPECIFICATIONS·························9
MAINTENANCE INFORMATION·······························10
Power unit···············································10
Ignition system·
···········································11
TIGHTENING TORQUE·
·····································11
Specified torque············································11
General torque··········································12
PERIODIC SERVICE·
··············································13
MAINTENANCE TIME TABLE······························13
FUEL SYSTEM··············································13
POWER UNIT·············································14
Engine oil level···········································14
Changing engine oil·
······································14
Valve clearance··········································15
Spark plug·
··············································15
CONTROL SYSTEM·
······································16
Throttle grip·
············································16
Idling speed············································16
LOWER UNIT·············································17
Gear oil···················································17
Changing gear oil·
·····································17
Lower unit leakage check·
·································17
GENERAL INSPECTION······································18
Anode·
················································18
Grease points·
···········································18
Cooling water passage·
··································18

RECOIL STARTER·················································19
NOTICE···················································19
EXPLOSIVE DRAWING·
·····································20
DISASSEMBLING···········································22
START ROPE REPLACEMENT································22
DISASSEMBLING AND INSPECTION·························23
ASSEMBLING···············································24
INSTALLATION············································24
IGNITION SYSTEM·
···············································24
NOTICE·
··················································24
EXPLOSIVEDRAWING······································24
WIRING DIAGRAM··········································25
SPARK PLUG IGNITION·····································26
SPARK PLUG CAP···········································27
FLYWHEEL MAINTENANCE·
·······························27
IGNITOR COIL INSPECTION·
··························27
FUEL SYSTEM·
···················································28
NOTICE····················································28
EXPLOSIVE DRAWING·
·····································29
FUEL TANK REMOVAL AND INSPECTION·····················32
INTAKE SYSTEM REMOVAL AND INSPECTION···············32
POWER UNIT·····················································33
NOTICE·
··················································33
EXPLOSIVE DRAWING·
············
·························33
SPECIAL TOOLS···········································40
DISASSEMBLING POWER UNIT FROM OUTBOARD ENGINE···40
DISASSEMBLING AND INSPECTION··························40
CYLINDER COVER·
·····································40
Disassembling·······································40
Push rod············································41
Valve and valve pipe···································41
Valve spring··········································41
Valve rocker arm·····································42
Valve pipe replacement·
······························42
Valve seat inspection···································42
Valve seat cutting·
····································42
Thermostat·
·········································43

CRANKCASE············································43
Disassembling·······································43
Piston·
·············································44
Cylinder bore········································44
Piston pin diameter···································44
Piston ring···········································44
Camshaft decompressor································44
Crankshaft········································45
Oil clearance·········································45
Valve lifter··········································46
Oil splash gear········································46
Crankshaft bearing···································46
Oil seal housing·····································46
Crankcase and crankcase cover·························46
FULL INSTALLATION···································46
Piston connecting rod installation························46
Piston ring installation·································46
Piston installation····································47
Oil seal housing installation·····························47
Crankshaft installation································47
Camshaft installation································47
Crankcase cover installation·
···························48
UPPER UNIT······················································48
TOPCOWLING············································48
Explosive drawing·······································48
Disassembling and inspection·······················49
BOTTOM COWLING·
······································50
Explosivedrawing·······································50
Disassemblingandinspection·
·····························50
STEERING HANDLE·
·······································51
Explosivedrawing·······································51
Disassembling and inspection·····························52
BRACKET·
·················································53
Explosive drawing······································53
Disassembling and inspection······························57
UPPER UNIT················································58
Explosive drawing······································58
Disassembling and inspection······························60
LOWER UNIT····················································62

WATERPUMPASSEMBLY···································62
Explosivedrawing·······································62
Disassembling and inspection······························63
LOWER UNIT···············································64
ExplosiveDrawing·
·····································64
Disassembling and inspection······························67
Propeller shaft and clutch block·························67
Clutch block installation······························67
Lower casing cover····································67
Lower casing cover oil seal and bearing installation·
········68
Barrel bearing·
······································68
Drive shaft···········································68
Gear················································68
Forward gear bearing·······························68
Lower unit casing·····································68
COMMON TROUBLES AND SOLUTIONS·
··························70

GENERAL INFORMATION
IDENTIFECATION
The outboard motor serial number is marked on the label. The label can be found on the bracket
left assembly or on the upper part of the bracket swivel. Record your outboard motor serial number
in the spaces provided to assist you in ordering spare parts from your Parsun dealer. To prevent
from theft, the serial number label will be destroyed if removed from the outboard motor.
1
1. Outboard motor serial number location
Serial number as follows:
SN
MOTOR BATCH SEQUENCE NUMBER
PRODUCTION CODE
PROPELLER SELECTION
The performance of your outboard motor will be critically affected by your choice of propeller, as an
incorrect choice could adversely affect performance.
For a greater boat load and a low engine speed, a smaller-pitch propeller is more suitable.
Conversely, a large-pitch propeller is more suitable for a smaller operating load as it enables the
correct engine speed to be maintained.
When the engine is running at full throttle position, the suitable propeller should be used according
to the engine’s RPM and the fuel capability, so that the outboard engine can supply the best
performance.
EMERGENCY START
Propeller sizes Material
7 1/4 × 6
7 1/4 × 5 1/2
7 1/4 × 7 1/4
7 1/4 × 8 1/4
7 1/2 × 5 1/2
Aluminum alloy
If the starting device is not working, the engine can be started by emergency start cable.
WARNING：
 The start program can only be used in emergency and to return to harbor for repairing.
 When you start the engine by emergency start cable, please ensure the shift rod is in
NEUTRAL position.
 Please ensure nobody standing behind you in case the cable is pulled out to hurt people.
 After the engine starts up, don’t fit the start device or top cowling. Put clothing or other
1

items far away. Don’t touch flywheel or other moving parts.
 When starting and operating, don’t touch ignition coil, spark plug cap or other electric
parts.
The procedure is as follows:
1. Remove the top cowling.
2. Remove the bolts fixing the fuel tank.
3. Lift the fuel tank and remove three bolts.
4．Lift the starter and remove choke cable from carburetor
5. Remove the starter.
6. Install the bolts to fix the flywheel cover
7. Install the bolts to fix the fuel tank.
2

8. When the engine is cold , circumvolve the lever of carburetor in order to operate choke system.
Return lever to home position after engine starts.
9. Insert the knot of the cable in the notch of flywheel rotor, and wind the cable around flywheel
several rounds in clockwise direction.
10. Pull the manual starter handle slowly until you feel resistance.
11. Give a strong pull to start the engine. Repeat if necessary.
SAFETY WHILE WORKING
To prevent the danger or accidents when performing maintenance and repair, and improve the work
efficiency, please obey the following safety procedures.
1. FIRE PREVENTION
Gasoline (petrol), lubricant and grease are highly flammable. While working, keep away from
heat, sparks and open flames.
2. VENTILATION
Petroleum vapor and engine exhaust gases are violent in toxicity. They are harmful to breathe
and deadly if inhaled in large quantities. When test-running an engine indoors, maintain good
ventilation.
3. SELF-PROTECTION
Protect your eyes with suitable safety glasses or safety goggles, when drilling, grinding or
operating air compressor. Protect hands and feet by wearing protective work clothes, safety
gloves and shoes if necessary.
4. LUBRICANTS AND SEALING FLUIDS
When performing maintenance procedures and repair to Parsun outboards, use only products
provided or recommended by our Company.
3

Under normal conditions of use, there should be no hazards from the use of the lubricants mentioned
in this manual, but safety is all-important, and by adopting good safety practices, any risk is
minimized.
A summary of the most important precautions is as follows:
○1 To protect the skin, the application of a suitable barrier cream to the hands before working is
recommended.
○2 Clothing which has become contaminated with lubricants should be changed as soon as
practicable, and washed before further use.
○3 Avoid skin contact with lubricants.
○4 Hands and any other part of the body which have been in contact with lubricants or
lubricant-contaminated clothing, should be thoroughly washed with hot water and soap as
soon as practicable.
○5 A supply of clean lint-free cloths should be available for wiping run-off lubricants or grease.
5. GOOD WORKING PRACTICES
○1 Follow the tightening torque instruction. When tightening bolts, nuts and screws, tighten
the large sizes first, and tighten inner-positioned fixings before outer-positioned ones.
○2 Use the recommended special tools to protect parts from damage. Use the right tool in the
right manner.
DISASSEMBLYAND ASSEMBLY
When disassembly and assembly, please follow the following principles:
1. Use special tools when disassembling and assembling.
2. Clean dirt before disassembling the parts.
3. Oil the contact surfaces of moving parts before assembly.
4. Install bearing with the manufacturer’s markings on the side exposed to view and liberally
oil the bearing.
5. When installing oil seals, apply a light coating of water-resistant grease to the ledge and
outside diameter.
6. After assembly, check if the moving parts operate normally.
ONE-TIME USE PARTS
One-time use parts are gasket, oil seal, O-ring, cotter pin and spring, ring, and etc.. When
re-assembling outboard engine, you must change the one-time use parts.
PRE-DELIVERY CHECK
To ensure the using, please inspect the following before delivery.
1. CHECKING FUEL SYSTEM
Check if the fuel pipe is connected firmly, and if the fuel tank is filled with fuel.
CAUTION:
Do not use pre-mixed fuel for this 4-stoke outboard engine.
2. CHECKING OIL LEVEL
4

○ 1Check the engine oil level
Check engine oil level from oil level checking hole.
1. High position mark 2. Low position mark
Ensure the oil level between the marks of upper and lower. If above upper level, drain
engine oil; if below lower mark, add engine oil up to upper level.
○
2 Check the gear oil level
Remove the oil level plug. Check if the gear oil overflows at the oil level checking hole.
If so, install the oil level plug and tighten it according to specified torque.
Otherwise please add gear oil.
1
1. Oil level plug
3. CHECK STEERING SYSTEM
Check if steering is stable.
Check if steering friction is adjusted correctly.
Turn clamp handle screw clockwise to increase
resistance.
Turn clamp handle screw counter clockwise to
lower resistance.
1.Clamphandlescrew
1
4. CHECK SHIFT LEVER AND THROTTLE
Check if the shift lever is operated smoothly.
Check if the throttle grip is turned smoothly from full closed position to full open position.
5. CHECK ENGINE STOP SWITCHASSY
Check if the engine stops when pushing the engine stop switch assembly or pulling out the
stopper hang rope.
6. CHECK COOLING WATER CHECKING HOLE
When the engine is running, check if
5

cooling water overflows at the cooling water checking hole.
1
1. Cooling water checking hole
7. BREAKING-IN RUNNING
○ 1 Initial 1 hour: operate the engine at 2000 r/min or about a half throttle.
② The second hour: operate the engine at 3000 r/min or about 3/4 throttle.
③ The following 8 hours: operate the engine at full throttle continuously. Each operation
time doesn’t exceed 5 minutes.
8. INSPECTION AFTER BREAKING-IN RUNNING
○
1 Check if gear oil contains water.
②Check if the fuel line leaks.
③After breaking-in running, operate the engine at idling speed. Use cleaning tool to wash
over the cooling water passage by fresh water.
9. After breaking-in running, inspect idling speed. 1
① Preheating engine for 5 minutes.
②Using the tachometer to measure idling speed RPM.
If out of specification, adjust it.
Idling speed: 1800~2000 r/min
③Turn the throttle stop screw clockwise or counter clockwise 1. throttle stop screw
until the specified idling speed is attained.
④After adjusting idling speed, picking up RPM several times to check the engine’s stability.
SPECIALTOOLSAND DETECTION DEVICE
When performing maintenance and repair, you need to use all kinds of special tools and detection
device. The use of correct tools will improve the work efficiency and avoid of the damage to the
people and outboard engines.
SPECIALTOOLS:
Pistonslider Flywheelholderandpuller Bearingpuller
6

Valve spring compressor Housing bearing installer Lower casing cover bearing installer
Oil seal installer tool Housing oil seal installer Space gage
Sleeve bearing with guard board installer tool Lower casing bracket and
sleeve bearing without guard board installer tool
Lower casing bracket and drive shaft oil seal installer tool
DETECTION DEVICE:
Digitaltachometer Digitaluniversalmeter Peakvoltageadaptor
7

EXPLOSIVE DRAWINGAND SYMBOL
EXPLOSIVE DRAWING
水泵内壳
REMARKS
PART NO. DESCRIPTION
M6x40 mm
8Nm
G
G
10
9
8
7
6
5
4
3
2
1
水泵座
F2.6-03000008
10
G
F4-03000013
F2.6-03000007
GB/T5783-2000
F2.6-03000016
F4-03000021
JASO F404 19-033
六角螺栓M6x40
泵壳固定板
水泵内壳O形圈
F2.6-03000015
外档板
叶轮组件
O形密封圈
定位销φ4x18
水泵座密封垫
F2.6-03000100
F2.6-03000010
F2.6-03000009
泵壳橡胶管
④
③
②
①
① Parts explosive drawing
② Screw specification and specified torque
③ Oil, fluid sealant or locking substance daubing point
④ Spare parts details
SYMBOL
O G L
1277
L
1243
Daub engine oil Daub waterproof
grease Daub screw locking substance 1277 Daub screw locking substance 1243
8

SPECIFICATIONS
OUTBOARD ENGINE SPECIFICATIONS
Item Description Item Description
Overall length 645mm Spark plug BPR7HS
Overall width 343mm Exhaust system Under water
Dimension
Overall height 1013mm
Power Unit
Lubrication
system Splash lubrication
Weight 18.0kg Fuel type
Unleaded regular
gasoline
Max output 1.9Kw(2.6hp)@5500r/min Fuel standard PON86、RON91
Full throttle
operation 5250～5750r/min Fuel tank
capacity 1.2L
Max fuel
consumption 1.1L/h@5500r/min Recommended
engine oil
API SE、SF、SE-SF、
SG-CD SAE
10W30、10W40
Performance
Idle speed
（Neutral）1900±100 r/min Engine oil
quantity 0.35L
Type 4 stroke, OHV Recommended
gear oil Hypoid gear oil SAE ﹟90
Number of
cylinders 1
Fuel and Oil
Gear oil
quantity 75mm3
Displacement 72cm³ Tilt angle
0o, 4o, 8o, 12o
Bore×Stroke 54.0mm×31.5mm Tilt-up angle
80o
Compression
ratio 9.0 Steering angle
360o
Number of
carburetors 1
Bracket
Gear positions F-N
Control system Tiller control Gear ratio 2.08（27/13）
Starting system Recoil starter Gear type Bevel gear
Ignition control
system T.C.I Propeller
direction Clockwise
Power Unit
Starting
enrichment Chock valve
Drive Unit
Propeller drive
system Spline
9

MAINTENANCE INFORMATION
Power Unit
Item Description Item Description
Intake 0.08~0.12mm
Cylinder
Head
Warp limit 0.1mm Valve
clearance
(cold) Exhaust 0.08~0.12mm
Bore 54.00~54.015mm Intake 1.84~2.26mm
Wear limit 54.1mm Face width Exhaust 1.84~2.26mm
Taper limit 0.08mm Intake 0.6~0.8mm
Cylinder
Out of round limit 0.05mm Seat width Exhaust 0.6~0.8mm
Piston diameter 58.950~58.965mm Intake 0.7mm
Measuring point
height
0mm (from the
Bottom of piston）
Margin
thickness Exhaust 1.0mm
Piston-to-cylinder
clearance 0.035~0.065mm Intake 23.9~24.1mm
Piston
Pin boss inside
diameter 12.009~12.017mm
Head
diameter Exhaust 21.9~22.1mm
Piston pin outside diameter 11.995~12.000mm Intake 5.475~5.490mm
Thickness 0.97~0.99mm
Stem outside
diameter Exhaust 5.460~5.475mm
Breadth 1.95~2.15mm Intake
End gap 0.15~0.30mm Guide inside
diameter Exhaust 5.500~5.512mm
Intake 0.010~0.037mm
Wear limit 0.40mm Stem to
guide
clearance Exhaust 0.025~0.052mm
Top ring
Side clearance 0.04~0.08mm
Valve
Rod runout limit 0.03mm
Thickness 1.17~1.19mm Push rod runout limit 0.5mm
Breadth 2.30~2.50mm Free length 35.0mm
End gap 0.30~0.45mm Free length limit 34.0mm
Wear limit 0.60mm
Valve
spring
Tilt limit 1.2mm
2nd ring
Side clearance 0.02~0.06mm Small end inside
diameter. 12.006~12.02mm
Thickness 1.87~1.95mm
Connecting
rod
Big end oil
clearance 0.016~0.046mm
Breadth 2.10~2.40mm Crankpin width 21.0~21.1mm
End gap 0.20~0.70mm Crankpin
diameter
23.969~23.984m
m
Wear limit 0.90mm Crankshaft
journal diameter
21.980~21.993m
m
Piston ring
Oil ring
Side clearance 0.06~0.16mm
Crankshaft
Round limit 0.01mm
10

Cont’d Item Description Item Description
Valve opening
temperature 58~62ºC
Intake/Exhaust height 26.139~26.239mm
Full-open
temperature 70ºC
Round diameter 21.950~22.050mm
Journal diameter 14.966~14.984mm
Camshaft
Camshaft round limit 0.03mm
Thermostat
Valve lift 3mm
Ignition system
Item Description Item Description
Ignition timing BTDC30º Spark plug gap 0.6~0.7mm
T.C.I system output
peak voltage 130V Primary coil 1.6~1.9Ω
T.C.I air gap 0.4~0.6mm
Ignitor
ass’y
resistance Secondary coil 5.8~7.0KΩ
TIGHTENING TORQUE
Specified torque
Part to be tightened Part name Thread size Quantity Torque
Oil drain Bolt M8 1 18Nm
Spark plug —M14 1 25 Nm
Recoil starter Bolt M6 3 8 Nm
Flywheel rotor ass’y Nut M10 1 44 Nm
Carburetor Bolt M6 2 8 Nm
Exhaust tester Bolt M8 1 20 Nm
1sttightening 14 Nm
Cylinder
head 2ndtightening Bolt M8 4
30 Nm
1st tightening 5 Nm
Cylinder
head cover 2ndtightening Bolt M6 6
12 Nm
Rocker arm screw bolt Bolt M6 2 10 Nm
Locknut (rocker arm) Nut M6x0.75 2 10 Nm
Oil seal housing Bolt M8 1 18 Nm
Power unit mounting Bolt M6 6 11Nm
Thermostat cover Bolt M6 3 8 Nm
1st tightening 5 Nm
Power unit
Crankcase 2nd tightening Bolt M6 8
11 Nm
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Cont’d Part to be tightened Part name Thread size Quantity Torque
1st tightening 5 Nm
Connecting
rod 2nd
tightening Bolt M7 2
9 Nm
Power unit
Oil splash gear unit Bolt M6 1 13 Nm
1st tightening 3 NmLower unit
mounting 2nd tightening Bolt M6 3
8 Nm
1st tightening 6Nm
Lower unit
housing
cover 2nd tightening Bolt M6 2
11 Nm
1st tightening 3 Nm
Anode 2nd tightening Bolt M6 1
8 Nm
1st tightening 3 NmWater pump
housing 2nd tightening Bolt M6 4
8 Nm
1st tightening 3 Nm
Lower unit
Water pump
base 2nd tightening Bolt M6 1
8 Nm
Steering handle mounting Bolt M8 1 26 Nm
Shift lever bracket Bolt M6 1 5 Nm
Swivel bracket Nut M6 4 12 Nm
Upper Unit
Clamp bracket Nut M8 1 16 Nm
General torque
Nut (a) Bolt (b) Torque
8mm M5 5Nm
10mm M6 8 Nm
12mm M8 18 Nm
14mm M10 36 Nm
17mm M12 43 Nm b
a
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PERIODIC SERVICE
MAINTENANCE TIME TABLE
Initial maintenace General maintenance
period
Items
Contents
10 hours
（1 month）50 hours （3 months）100 hours
（6 months）
200 hours
（1 year）
Anode Inspection/replacement ○○
Spark plug Cleaning/adjustment
/replacement ○○○
Grease points Greasing ○
Bolts and nuts Inspection ○○
Fuel tank and fuel line Inspection ○
Fuel filter Inspection/replacement ○○○
Carburetor Inspection/replacement ○○
Outboard outside Inspection/replacement ○○
Idling speed Inspection/ adjustment ○○
Engine oil Replacement ○○
Valve cleanrance Inspection/ adjustment ○○
Ignition timing Inspection ○○
T.C.I air gap Inspection/ adjustment ○○
Thermostat Inspection ○
Cooling water passage Inspection/Cleaning ○○
Gear oil Replacement ○○
Propeller Inspection/replacement ○○
CAUTION:
After running the outboard engine in salt water, waste water or mud water, wash
over the engine by fresh water immediately.
If using leaded gasoline frequently, check the valve and components each 100 hours.
FUEL SYSTEM
1. CHECK FUEL TANK, CARBURETOR, FUEL PUMPAND FUEL PIPE
Check if fuel tank, carburetor, fuel pump and fuel pipe
are damaged or leaked. Replace if necessary.
Check if the fuel filter on the tank is dirty.
Clean dirt or replace it if necessary.
2. CHECK FUEL COCK
Check if fuel cock is cracked, damaged or leaking.
Replace if necessary.
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POWER UNIT
Engine oil level
1. From oil level checking hole, check if engine oil level is between the following marks of the
upper and lower.
1. Oil level plug 2. Oil rule 3. High position mark 4. Low position mark
2. If above the upper mark, drain the engine oil; if below lower mark, add engine oil up to upper
mark.
CAUTION:
Run the engine for a few minutes and then turn it off, wait for several minutes, and check the
engine oil level by the oil checking hole again.
If the engine oil still not within the proper level, add/drain as needed.
Changing engine oil
1. Remove oil level plug, drain plug with washer and gasket; drain off the engine oil.
2. Install new gasket and washer; install drain plug.
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