Technical Information · issue 48 of 1998
088: Carburetor HT-12B
Model 088 Chainsaws - Series 1124
IssueTI 48/1998
Engine family 1124
Full text
Page 1 of 2
Technical Information
48.98
Model 088 Chainsaws - Series 1124
Carburetor HT-12B
1. Adjustment after repair and servicing
2. Instructions for user
Carburetor 1124 120 0650 has been modified to simplify service adjustments and installation of the
limiter caps.
The following descriptions only cover the differences over the original version.
For further information on construction and function see TI 40.97.
1. Adjustment after repair and servicing fo
1.1 Preparations
• Check air filter and clean or replace as
necessary.
• Check spark arresting screen and clean or
replace as necessary.
• Check chain tension.
1.2 Basic setting (without limiter caps)
Make basic setting as follows with the adjusting
screws:
• Starting with screws lightly against their seats:
• Open low speed screw (L)
1 full turn (previously L = 7/8)
• Open high speed screw (H)
1 full turn (as before)
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1.3 Fitting limiter caps
• Always fit new limiter caps!
• Push cap on to low speed screw as follows:
Slot horizontal - Stop must be positioned
between the marks (see ill.)
• Push cap on to high speed screw as follows: H L
Slot vertical - Stop must be positioned
between the marks (see ill.)
171TI017 KN
• Push limiter caps on to adjusting screws
until their are flush with the stop.
The position of the limiter caps (and the adjusting
screws) is exactly the same as the standard
setting (see chapter "Carburetor Adjustment" in
owner’s manual).
1.4 Adjusting idle speed
LA
• Use idle speed screw (LA) to set engine speed
to 2,700 rpm.
• Open low speed screw (L) one quarter turn
counterclockwise from the cap’s stop. fo
This adjustment must be checked with a L
tachometer.
171TI018 KN
1/4
2. Instructions for user
The user can adjust the carburetor screw within a
range of 180 degrees. This enables the mixture to
be made leaner, if necessary, for operation at high
altitudes. These instructions are exactly the same
as those in the owner’s manual (see chapter 180°
"Carburetor Adjustment").
171TI012 KN
The carburetor part number remains unchanged.
Last Technical Information on model 088: 40.97
1998 Andreas Stihl AG & Co. Technical Documentation
Waiblingen D1/MTK-al 6451 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.