Technical Information · issue 15 of 2005
Tank vent
IssueTI 15/2005
Engine family 1122
Full text
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STIH)
Technical Information 15.2005
STIHL MS 660 Chainsaw – Series 1122
Tank vent
Starting with machine No. 1 63 264 274, the Function
previous tank vent 1122 350 5803 will be replaced
with the improved 0000 350 5802.
When the pressures are the same both outside (1)
and in the fuel tank (2), the membrane (3) is pressed
Left: Previous tank vent with connector (1) by the spring against the valve plate (4) to close the
1122 353 9102, filter (2) 1122 358 1800 and valve.
valve (3) 1110 353 1600
Right: New tank vent (4) 0000 350 5802 with
grommet (5) 1122 353 9200
TI_15_2005_30_01_01.fm englisch / english USA
)m~ge 2 Technical Information 15.2005
Supply of spare parts
The tank housing 1122 350 0817 is only delivered
from the factory with the new tank vent
0000 350 5802. The earlier tank vent
1122 350 5803, filter 1122 358 1800, connector
1122 353 9102 and valve 1110 353 1600 can still be
ordered for older machines.
Service notes
Before installing the grommet in the tank housing,
wet the perimeter of the grommet with two-stroke oil.
When fuel is drawn from the tank, a vacuum initially When affixing the grommet, make sure not to
arises in the tank (2). The vacuum lifts the damage it; do not use a sharp or pointed tool.
membrane (3) from the valve plate (4) to open the
Before inserting the new tank vent in the grommet,
valve. Air flows into the fuel tank. This causes the
wet the perimeter of the tank vent connector with
pressures on both sides of the membrane to
two-stroke oil. Center the tank vent and press it into
equalize.
the hole in the grommet. Do not use a sharp or
The valve closes when the pressures are equal.
pointed tool.
Summary
Item Part name Previous New Remarks
1 Tank housing, including: 1122 350 0817 1122 350 0817 1)
2 Tank vent 1122 350 5803 --- 2)
3 Connector 1122 353 9102 --- 2)
4 Filter 1122 358 1800 --- 2)
5 Valve 1110 353 1600 --- 2)
6 Tank vent --- 0000 350 5802
7 Grommet --- 1122 353 9200
Modification to be introduced from serial number 1 63 264 274
Remarks
1) The part will be delivered in the same design until older inventory is used up
2) The previous version of part will remain available for older machines
Last Technical Information on the STIHL MS 660: 27.2003
© ANDREAS STIHL AG & Co. KG, 2005 Technical Documentation
D1/MTK-bl
TI_15_2005_30_01_01.fm Page 2 of 2
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.