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  • Topic: Carburetor, Throttle, Screw
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  • Published : September 9, 2012
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Technical Information
27.2001
Model HL 45 Hedge Trimmer Model FC 55 Power Edger Model FS 55 Trimmer Model FS 45 Trimmer Contents 1. Carburetor with LD Screw (Flange and End Cover Mounting, Fixed Jet) 2. Model Update 2.1 Carburetor with 3 Adjusting Screws 2.2 Spacer Flange 2.3 Tensioner, Throttle Cable 2.4 Filter Housing (Choke Shutter), Filter Cover 2.5 Ignition Module, Crankshaft 2.6 Fuel Tank, Hose, Retainer 2.7 Clutch (Cup Spring), Washer 2.8 Rewind Starter 2.9 Summary

– Series 4232 – Series 4140 – Series 4140 – Series 4140

1.

Carburetor with LD Screw
(Flange and End Cover Mounting, Fixed Jet) The previous C1Q-S44 carburetor was initially replaced by the C1Q-S53 and then by the C1Q-S58 (with a modified fixed jet). The end cover and flange on the C1Q-S53 and C1Q-S58 carburetors are now mounted with 4 screws of the same length instead of separately with two short screws and two long screws. The individual parts of the previous C1QS44 and C1Q-S53 carburetors remain available as spares (see Illustrated Parts List). Parts availability The new versions of the end cover and flange may only be used together. For this reason, flange kit 4140 120 2250 has been put together for the C1Q-S44 carburetor. This flange kit comes complete with gasket, metering diaphragm, end cover, 4 new mounting screws and illustrated instructions. The new flange and end cover are also available as separate items for repairs to the new version of the carburetor.

1 2 3 3 4 6 7

1 2

5 6 7

Left: Carburetor 4140 120 0600 (C1Q-S44) Right: Carburetor 4140 120 0601 (C1Q-S53) or 4140 120 0610 (C1Q-S58)

253TI001 KN

TI_27_2001_02_01_01.fm

englisch / english

Page 2

Technical Information 27.2001

Summary Item Part Name Carburetor C1Q-S44; Carburetor C1Q-S53; Carburetor C1Q-S58; including items 1, 2, 5 to 7: Screw End cover Screw (2x) Flange Flange Metering diaphragm Gasket Flange kit; including items 1, 2, 5 to 7 Previous 4140 120 0600 4140 120 0601 --4226 122 7100 4226 121 0800 1128 122 7100 4226 120 2200 --4129 121 4700 4129 129 0902 --New 4140 120 0610 4140 120 0610 4140 120 0610 4226 122 7100 4140 121 0800 ----4140 120 2200 4129 121 4700 4129 129 0902 4140 120 2250 Remarks 1) 1)

1 2 3 4 5 6 7 8

2) 1), 4) 3) 1), 4)

4)

Modification to be introduced: in progress Remarks 1) Previous version of part no longer available from factory 2) Quantity changed from 2 to 4 3) Previous version of part remains available for other models 4) Use 4140 120 2250 flange kit as replacement part for carburetor 4140 120 0600 (C1Q-S44)

2.

Model Update

Apart from further optimizing and improving functionality and reliability, the aim of the model update is to comply with the new emission regulations. The modifications to the parts and assemblies affected are described below. 2.1 Carburetor with 3 Adjusting Screws

The carburetor 4140 120 0610 discussed in chapter 1 (BIS* carburetor with LD screw) will be replaced by the new version 4140 120 0603 (with H, L and LA screws). *BIS = Balanced Idle System The new carburetor’s high speed screw is equipped with a cap to limit its range of adjustment. The low speed screw and idle speed screw are also equipped with funnel-shaped caps to ease insertion of the carburetor screwdriver. Left: Carburetor with LD screw Right: Carburetor with H, L and LA screws

TI_27_2001_02_01_01.fm

392TI033 KN

Technical Information 27.2001

Page 3

2.1.1 Construction

2.1.3 Repairs / Servicing

4

1 2 3
392TI034 KN 392TI036 KN

. . . .

Low speed mixture screw (1) High speed mixture screw (2) Limiter cap (3) for high speed screw Stop pin (4)

The limiter cap has to be removed from the high speed screw to replace a damaged high speed screw or clean the carburetor. . Use suitable pliers to pull off the cap. Do not re-use caps because they are damaged during removal. 2.1.4 Adjustment after Repairs / Servicing . . . Check the air filter and clean or replace as necessary. Check spark...
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