Technical Information · issue 29 of 2008
New STIHL BG 56, 66, 86 Blowers; New STIHL SH 56, 86 Shredder Vacs
IssueTI 29/2008
Full text
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STIH)
Technical Information 29.2008
New STIHL BG 56 C, 66, 86 Blowers – Series 4241
New STIHL SH 56 C, 86 C Shredder Vacs – Series 4241
Contents
1. Specifications
2. Special Accessories for Users
3. Service Accessories
4. Repairs
5. Spare Parts
TI_29_2008_30_01_01.fm englisch / English
)m~ge 2 Technical Information 29.2008
The new STIHL BG 56 C, BG 66 and BG 86 1. Specifications
handheld blowers and the SH 56 C and SH 86 C
shredder vacs are low emission engines. 1.1 Motor
BG 56 C and BG 86 blowers can be converted into
a shredder vac with (special accessory) vacuum 1.1.1 Engine
attachment 4241 700 2200. Single cylinder two-stroke engine
Displacement: 1.66 cu in (27.2 cc)
The new STIHL BG 66 handheld blower combines Bore: 1.34 in (34 mm)
the low noise level of the BG 45 with the blowing Stroke: 1.18 in (30 mm)
performance of the BG 55. Idle speed: 2500 rpm
The BG 66 cannot be converted into a shredder vac. Engine power to ISO 7293:
BG 56 C, SH 56 C 0.7 kW (0.9 hp)
BG 66 0.6 kW (0.8 hp)
The STIHL two-stroke engine with stratified
BG 86, SH 86 C 0.8 kW (1.1 hp)
scavenging has the same power output as the
BG 55, but consumes about 20% less fuel. This
1.1.2 Ignition System
lowers running costs and greatly reduces
emissions. Electronic magneto ignition
Special features of the new STIHL BG 56 C, BG 66 Spark plug (resistor type): NGK CMR 6 H
and BG 86 blowers and the SH 56 C and SH 86 C Electrode gap: 0.020 in (0.5 mm)
shredder vacs are:
1.2 Fuel System
. User friendly starting procedure All position diaphragm carburetor with integral fuel
pump
. Ergonomic design
Fuel tank capacity:
. Reduced fuel consumption
BG 56 C, SH 56 C: 18.3 oz (0.54 L)
. Reduced exhaust emissions BG 66: 18.3 oz (0.54 L)
BG 86, SH 86 C: 14.9 oz (0.44 L)
Typical applications are maintaining:
1.3 Air volume
. Gardens and yards
Blower mode, Vacuum mode
. Sports facilities without nozzle
. Grounds and parks BG 56 C: 430 cf/min ---
(730 m3/h)
BG 66: 430 cf/min ---
(730 m3/h)
BG 86: 477 cf/min ---
(810 m3/h)
SH 56 C: 430 cf/min 418 cf/min
(730 m3/h) (710 m3/h)
SH 86 C: 477 cf/min 453 cf/min
(810 m3/h) (770 m3/h)
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Technical Information 29.2008 Page 3
1.4 Sound Pressure level 1.6 Weight
to ANSI B175.2 dry, blower mode
BG 56 C: 9.3 lbs (4.2 kg)
Blower mode, Vacuum mode
without nozzle BG 66: 9.7 lbs (4.4 kg)
BG 56 C: 70 db (A) --- BG 86: 9.7 lbs (4.4 kg)
BG 66: 65 db (A) --- BG 86 C: 9.9 lbs (4.5 kg)
BG 86: 70 db (A) ---
SH 56 C: 70 db (A) 70 db (A)
dry, vacuum mode
SH 86 C: 70 db (A) 70 db (A)
SH 56 C: 11.5 lbs (5.2 kg)
1.5 Air velocity SH 86 C: 12.3 lbs (5.6 kg)
Blower mode, at round nozzle
BG 56 C: 143 mph (64 m/sec)
BG 66: 143 mph (64 m/sec)
BG 86: 154 mph (69 m/sec)
SH 56 C: 143 mph (64 m/sec)
SH 86 C: 154 mph (69 m/sec)
Blower mode, at flat nozzle
BG 86: 190 mph (85 m/sec)
SH 86 C: 190 mph (85 m/sec)
2. Special Accessories for Users
Part Name Part No. Application
ElastoStart™ 0000 190 3404 Rewind starter (grip with rope).
STIHL special oil 0781 417 1315 Rewind spring,
- 100 ml bottle bearing bore in rope rotor.
Vacuum attachment 4241 700 2200 Converting blower to shredder vac
(BG 56 C, 86 only).
Gutter cleaning kit 4241 007 1003 For cleaning debris from roof gutters that are
accessible from ground level.
Curved fan nozzle 4241 708 6302 Provides a powerful airstream at ground level
(BG 56 C, 86 and SH 56 C, 86 C only).
TI_29_2008_30_01_01.fm
)m~ge 4 Technical Information 29.2008
3. Service Accessories
3.1 New Special Tools
298TI003 KN
The leakage test can be performed with new test
298TI001 KN
flange 5910 850 4200.
The flywheel can be released from the crankshaft All other special tools are listed in the service
stub with the new puller 5910 893 0801. manual for models STIHL BG 56 C, 66, 86;
SH 56 C, 86 C.
Part Name Part No. Application
Puller 5910 893 0801 Flywheel
Flange 5910 850 4200 Leakage test
3.2 Servicing Aids
Part Name Part No. Application
Carburetor parts kit 4241 007 1002 Zama C1M-S141
Zama C1M-S142
Zama C1M-S144
Set of gaskets 4241 007 1001 Engine
Standard commercial solvent- Cleaning the crankshaft stub
based degreaser containing no
chlorinated or halogenated
hydrocarbons
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Technical Information 29.2008 Page 5
4. Repairs
If the machine is started in the course of repairs, it is essential to observe all safety precautions found in the
product instruction manual.
4.1 Tightening Torques
The tightening torques are listed in the service manual for models STIHL BG 56 C, 66, 86; SH 56 C, 86 C.
4.2 Service Note
The service manual for models STIHL BG 56 C, 66, 86; SH 56 C, 86 C is available for servicing and repair
operations.
4.3 Repair Times
The specified repair times assume that the work is performed by trained personnel in a properly equipped
service workshop.
Repair times are quoted in minutes.
Code Type of Repair BG 56 C, 66, 86, 86 C;
SH 56 C, 86 C
2 Replace crankcase, crankcase gasket or re-seal crankcase.
Includes air leak test. 55
3 Replace crankshaft main bearing(s). Includes air leak test. 55
4 Replace crankshaft seal(s). Includes air leak test. 55
5 Perform engine air leak test. 25
6 Replace cylinder and/or piston. Includes air leak test and repair
of components causing failure. 45
7 Replace ignition module. Includes stop circuit test. 25
8 Replace fuel tank line, tank vent, or fuel pick-up body. 20
9 Replace intake manifold or intake flange. 20
10 Repair or replace carburetor. Includes fuel system testing. 30
11 Repair throttle control. 20
12 Repair or replace rewind starter. 15
13 Replace fan wheel. 20
14 Replace muffler. 30
15 Replace air filter or filter housing. 15
16 Repair or replace stop switch. Includes circuit testing. 15
17 Replace fan housing. 30
19 Replace air discharge tube or elbow. 15
22 Replace fuel tank. 30
40 Miscellaneous repairs and other repairs not listed. 15
45 Handling allowance only-no labor. 10
50 No labor. 0
5. Spare Parts
The illustrated parts list for the BG 56 C, 66, 86 and SH 56 C, 86 C will be available for market launch.
© ANDREAS STIHL AG & Co. KG, 2008 Technical Documentation
D1/MTK-ni
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Extracted from the manufacturer's 2012 service catalogue. Most of these PDFs embed fonts with a shifted character map, so the text above was recovered rather than copied — read it as a faithful but imperfect transcription, and treat the page image above each block as the authority where the two disagree — the figures exist only there, because they are vector drawings that text extraction cannot keep.