No.13-009
Subject
: New model information for M 70CX
Applicable models : M 70CX
Serial No.
: 009988AC~
< Summary >
Production of the new M 70CX started in January 2013.
This Service Bulletin provides service information that is necessary for this model.
< Product features >
・For using low octane fuel,
Optimized carburetor setting
Low compression ratio cylinder head
Changed ignition timing
・Re-circulation check valves are changed to ease maintenance access.
・Optimized standard propeller
・Utilizes Resistance-free spark plug, plug cap and plug cap terminal.
・Premix lubrication oil
April 2013
Page 1 of 11
Interchangeability
A
B
C
D
<Part> <Engine> <Part> <Engine> <Part> <Engine> <Part> <Engine>
Old
Old
Old
Old
Old
Old
Old
Old Interchageable as
a set
New
New
New
New
New
New
New
New
No.13-009
< Parts comparison >
Engine Block
Engine Block’s color has been changed.
M70C
M70CX
Black
Gray
Part name
M70C
M70CX
Qty
ENGINE SHORT
BLOCK KIT
CYL BLOCK &
CRANKCASE ASSY
THERMOSTAT CAP
INTAKE MANIFOLD
ASSY
EXHAUST COVER
ASSY
EXHAUST COVER
(INNER)
CYLINDER HEAD
COVER
3F3B87090-7
3PNJ87090-0
1
3F3B01100-1
3PNJ01100-0
1
3B7B01031-0
3B7J01031-0
1
3F3B02020-1
3F3J02020-1
1
3F3B02300-2
3F3J02300-2
1
3F3B02302-0
3F3J02302-0
1
3F3B01021-1
3F3J01021-1
1
Cylinder Head
Reduce compression pressure for using low octane fuel.
Material of cylinder head has been changed to prevent corrosion.
Compression ratio ：6.27→5.75
M70C
April 2013
M70CX
Part name
M70C
M70CX
Qty
CYLINDER HEAD
ASSY
3F3B01091-2
3PNJ01091-0
1
Page 2 of 11
Interchangeability
A
B
C
D
<Part> <Engine> <Part> <Engine> <Part> <Engine> <Part> <Engine>
Old
Old
Old
Old
Old
Old
Old
Old Interchageable as
a set
New
New
New
New
New
New
New
New
No.13-009
Crankshaft Assy
Spacer has been added instead of oil pump driven gear. (For premix oil
specification)
M70C
Part name
CRANKSHAFT
SUB-ASSY
SPACER
M70CX
M70C
M70CX
Qty
3N4-00069-1
3PN-00069-0
1
-
3PN-00119-0
1
Carburetor
To take effective measure to knocking by using low octane fuel
M70C
M70CX
Orange color
Part name
CARBURETOR
ASSY
*MAIN JET (#145)
CARBURETOR
ASSY (SECOND)
*MAIN JET (#145)
CARBURETOR
ASSY (THIRD)
*MAIN JET (#145)
April 2013
M70C
M70CX
Qty
3F3-03200-1
3PN-03200-0
1
3K7-03251-0
3PN-04645-0
1
3F3-03207-1
3PN-03207-0
1
3J5-03251-0
3PN-04645-0
1
3F3-03210-1
3PN-03210-0
1
3K7-03251-0
3PN-04645-0
1
Page 3 of 11
Interchangeability
A
B
C
D
<Part> <Engine> <Part> <Engine> <Part> <Engine> <Part> <Engine>
Old
Old
Old
Old
Old
Old
Old
Old Interchageable as
a set
New
New
New
New
New
New
New
New
No.13-009
Spark Plug, Spark Plug Cap (ignition coil)
Spark Plug Cap has been changed to prevent water intrusion.
Also, Standard Spark Plug has been changed to B8HS-10 for more ignition
reliability.
・Ignition timing
M70C
M70CX
BR8HS-10
B8HS-10
Plug Cap
Terminal
Band for fastening Plug Cap end
Part name
SPARK PLUG
BR8HS10→
B8HS10
IGNITION COIL
ASSY W/LABEL
PLUG CAP
PLUG TERMINAL
BAND
SPARK PLUG
DECAL
April 2013
M70C
M70CX
Qty
9701-1-1016
9701-1-1009
3
3C8-06048-0
3PN-06048-0
3
346-06999-0
-
3M2-06921-0
3M2-06926-0
3T5-84398-0
3
3
3
3A3-72026-0
360-72025-0
1
Page 4 of 11
Interchangeability
A
B
C
D
<Part> <Engine> <Part> <Engine> <Part> <Engine> <Part> <Engine>
Old
Old
Old
Old
Old
Old
Old
Old Interchageable as
a set
New
New
New
New
New
New
New
New
No.13-009
Check Valve
Check Valve has been changed to improve ease of maintenance.
M70C
M70CX
Part name
M70C
M70CX
Qty
HOSE
HOSE
HOSE
HOSE
HOSE
HOSE
CHECK VALVE
BAND
-
98AL-40-350
98AL-40-030
98AL-40-310
98AL-40-030
98AL-40-260
98AL-40-050
3LC-01160-0
3T5-84398-0
1
1
1
1
1
1
1
1
Additional Ground Cable
A Ground Wires have been added between cylinder, cylinder head and exhaust
cover.
April 2013
Part name
M70C
M70CX
Qty
GROUND
-
3C8-62396-1
2
Page 5 of 11
Interchangeability
A
B
C
D
<Part> <Engine> <Part> <Engine> <Part> <Engine> <Part> <Engine>
Old
Old
Old
Old
Old
Old
Old
Old Interchageable as
a set
New
New
New
New
New
New
New
New
No.13-009
Bolts,
Following bolts, washers, and clamps have been changed to improve
anti-corrosion.
7
6
4
5
3
2
1
8
8
8
8
9
11
9
April 2013
11
10
10
Page 6 of 11
Interchangeability
A
B
C
D
<Part> <Engine> <Part> <Engine> <Part> <Engine> <Part> <Engine>
Old
Old
Old
Old
Old
Old
Old
Old Interchageable as
a set
New
New
New
New
New
New
New
New
No.13-009
Fig. No.
1
2
3
4
5
6
7
8
9
10
11
Part name
BOLT
→CYLINDER
HEAD BOLT
WASHER
BOLT
BOLT
WASHER
BOLT
WASHER
BOLT
WASHER
CLAMP
SCREW
M70C
M70CX
Qty
9161F9-0860
3N4-01012-0
14
345-01015-0
910121-5625
916124-0628
940121-0600
9161F4-0625
940121-0600
9101E3-5612
345-01015-0
309-06972-0
921503-0610
3C8-01015-0
9101E3-5625
910103-7630
9161F9-0625
9401E3-0600
910103-5612
3C8-01015-0
336-06973-0
9215E3-0610
14
14
1
1
26
26
4
2
2
2
Recoil Starter Seal
The material of Starter Seal has been changed rudder into sponge rudder to
improve sealing performance.
M70C
M70CX
Deleted (Rubber)
April 2013
Part name
M70C
M70CX
Qty
STARTER SEAL
TOP COWL ASSY
344-67503-0
3F5Q67510-4
3C8-67503-0
3F5Q67510-5
1
1
Page 7 of 11
Interchangeability
A
B
C
D
<Part> <Engine> <Part> <Engine> <Part> <Engine> <Part> <Engine>
Old
Old
Old
Old
Old
Old
Old
Old Interchageable as
a set
New
New
New
New
New
New
New
New
No.13-009
Top cowl Decal
Design of Top Cowl Decal has been changed.
M70C
M70CX
Part name
M70C
M70CX
Qty
DECAL SET
3N4-87802-1
3PP-87802-0
1
CD unit
Specification of ESG has been optimized.
High speed ESG
5900±250 r/min → 6100±250 r/min
Low speed ESG
3500±400 r/min → 3200±400 r/min
*The part number has not been superseded.
Ignition timing
Ignition timing has been optimized to take effective measure for knocking.
18°→15°
Crankcase mold boss
17 ㎜
Ignition timing
W.O.T: BTDC18°→BTDC15°
April 2013
Page 8 of 11
Interchangeability
A
B
C
D
<Part> <Engine> <Part> <Engine> <Part> <Engine> <Part> <Engine>
Old
Old
Old
Old
Old
Old
Old
Old Interchageable as
a set
New
New
New
New
New
New
New
New
No.13-009
Propeller
Standard propeller has been changed.
Transom L, UL
Part name
Propeller Ass’y (L,UL)
15"→13"
M70C
M70CX
Qty
3N4B64532-1
3HKB64527-0
1
< Specification >
C
Type
MFGL/UL
Manual Recoil Starter
●
Electric Starter
-
Alternator
●
Rectifier
○
Propeller
●
Tiller handle
●
970mm
Gas Assist Tilt
●
MFGUL 1542mm 644mm 1070mm
25L Fuel Tank
●
A
B
Model
MFGL
April 2013
A
B
1415mm 517mm
C
Page 9 of 11
Interchangeability
A
B
C
D
<Part> <Engine> <Part> <Engine> <Part> <Engine> <Part> <Engine>
Old
Old
Old
Old
Old
Old
Old
Old Interchageable as
a set
New
New
New
New
New
New
New
New
No.13-009
Model
M70CX PRO
MFGL/MFGUL
Engine(No.of Cylinder)
3
Engine Type
Two-Stroke
Output
70PS(51.5kW)
Displacement
938 cc
Bore x Stroke
74x72.7mm
Fuel Consumption at W.O.T.
29 l/hr
Engine Lubrication System
Premixed Fuel
Starting
Manual Recoil Starter
Control Type
Tiller Handle
Gear Reduction Ratio
2.33(12:28)
Transom Height
20”/25”
Fuel
Unleaded Gasoline(87 Octane)
Weight
MFGL:105.5kg MFGUL:108kg
Alternator Output
12V130W,11A
Max.RPM Range
5150-5850
April 2013
Page 10 of 11
Interchangeability
A
B
C
D
<Part> <Engine> <Part> <Engine> <Part> <Engine> <Part> <Engine>
Old
Old
Old
Old
Old
Old
Old
Old Interchageable as
a set
New
New
New
New
New
New
New
New
No.13-009
< Wiring >
April 2013
Page 11 of 11
Interchangeability
A
B
C
D
<Part> <Engine> <Part> <Engine> <Part> <Engine> <Part> <Engine>
Old
Old
Old
Old
Old
Old
Old
Old Interchageable as
a set
New
New
New
New
New
New
New
New