LIMBACH L 2000 EA Operating instructions

Operating and Maintenance Manual
Limbach L 2000
Engine for Powered Gliders and
Very Light Aircraft
Edition: 01.03.2016
This manual is approved in accordance with the procedures of the EASA approved develop-
ment organization No. EASA.21J.270.
Approval and translation has been done by best knowledge and judgement. - In any
case the original text (P/N 201.253.900.000) in german language is authoritative.
Limbach Flugmotoren GmbH & Co. KG
Kotthausener Str. 5
D-53639 Königswinter, Germany
Tel. ++49-2244-9201-0
Fax ++49-2244-9201-30
www.limflug.de
© Limbach Flugmotoren GmbH & Co. KG 201.253.905.000

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Table of Contents
1.1 Change Index...............................................................................................................................................4
1.2 Release........................................................................................................................................................4
2Introduction....................................................................................................................................................5
3Engine Description.........................................................................................................................................6
3.1 Model Designation .......................................................................................................................................6
3.2 Cylinder Designation....................................................................................................................................8
4Technical Data...............................................................................................................................................9
4.1 LIMBACH L 2000 E0...................................................................................................................................9
4.2 LIMBACH L 2000 EA ................................................................................................................................11
4.3 LIMBACH L 2000 EB ................................................................................................................................13
4.4 LIMBACH L 2000 EC................................................................................................................................15
4.5 LIMBACH L 2000 DA................................................................................................................................16
5Performance ................................................................................................................................................18
5.1 Performance Graph LIMBACH L 2000 E0 and L 2000 EC.......................................................................18
5.2 Performance Graph LIMBACH L 2000 EA ...............................................................................................19
5.3 Performance Graph LIMBACH L 2000 EB ...............................................................................................20
5.4 Performance Graph LIMBACH L 2000DA ................................................................................................21
6Operating Instructions..................................................................................................................................22
6.1 Before Starting...........................................................................................................................................22
6.2 Engine Start-Up..........................................................................................................................................22
6.3 Runup, Performance Check.......................................................................................................................23
6.3.1 Performance Check ...................................................................................................................................23
6.3.2 Check carburetor heating for proper functioning .......................................................................................23
6.4 Hot Engine Start-Up...................................................................................................................................23
6.5 Take-Off .....................................................................................................................................................23
6.6 Engine Shut-Down.....................................................................................................................................24
6.7 Inflight Shut-Down and Restarting .............................................................................................................24
6.8 Engine operation on hot days ....................................................................................................................24
7Maintenenance Schedule............................................................................................................................25
7.1 Daily Check................................................................................................................................................25
7.2 Periodical Checks ......................................................................................................................................25
7.2.1 Every 6 Months Following 100 h Inspection ..............................................................................................25
7.2.2 Every 2 Years after the last Overhaul........................................................................................................25
7.2.3 Every 5 Years after New or Main Overhaul ...............................................................................................25
7.3 Operating Time related Inspections...........................................................................................................26
7.3.1 After the first 5 Operating hours.................................................................................................................26
7.3.2 After the first 25 Operating hours...............................................................................................................26
7.3.3 Every 25 Operating hours..........................................................................................................................26
7.3.4 Every 50 Operating hours..........................................................................................................................26
7.3.5 Every 100 Operating hours........................................................................................................................27
7.3.6 Every 250 Operating hours........................................................................................................................27
7.3.7 Every 500 Operating hours........................................................................................................................27
8Maintenence Instructions.............................................................................................................................28
8.1 Oil Change .................................................................................................................................................28
8.2 Cleaning of Air Filter...................................................................................................................................29
8.3 Check and greasing of Carburetor control.................................................................................................29
8.4 Replacing of Float Valve............................................................................................................................29
8.5 Check / replacement of Carburetor Diaphragm.........................................................................................29
8.6 Carburetor Oil level check..........................................................................................................................30
8.7 Fuel Pump Screen cleaning.......................................................................................................................30
8.7.1 Engines with APG Fuel Pump....................................................................................................................30
8.7.2 Engines with Limbach Fuel Pump..............................................................................................................31
8.8 Fuel Filter cleaning.....................................................................................................................................32
8.9 Fuel and Lubrication System leakage check .............................................................................................32
8.10 Crankcase Ventilation Check.....................................................................................................................32
8.11 Compression Check...................................................................................................................................32
8.12 Check and Setting of Valve Clearance......................................................................................................32
8.13 Check of Valve Shaft Projecting Length ....................................................................................................33
8.14 Cleaning, Check and Setting of Spark Plugs.............................................................................................34

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8.15 Drive Belt check, stretching and replacement ...........................................................................................35
8.16 Exhaust System Check..............................................................................................................................36
8.17 Bowden Cable Check.................................................................................................................................36
8.18 Harness Check...........................................................................................................................................36
8.19 Check of Bolted Connections.....................................................................................................................36
8.20 Engine Test Run ........................................................................................................................................37
8.21 Engine Preservation...................................................................................................................................37
8.21.1 Compliance ................................................................................................................................................37
8.22 Operation at low ambient Temperatures ...................................................................................................38
8.23 Operation in Tropical Conditions................................................................................................................39
8.24 Miscellaneous ............................................................................................................................................39
9Overhaul ......................................................................................................................................................40
9.1 Major Overhaul...........................................................................................................................................40
9.2 Major Repair...............................................................................................................................................40
10 Lubricants, Coolants, Fuels.........................................................................................................................41
10.1 List of Lubricants........................................................................................................................................41
10.2 Fuels ..........................................................................................................................................................42
11 Recommended Tightening Torques............................................................................................................43
12 Trouble Shooting .........................................................................................................................................44
12.1 Engine Starting Trouble .............................................................................................................................44
12.2 Engine Operating Trouble..........................................................................................................................45
12.2.1 Fuel Supply................................................................................................................................................45
12.2.2 Ignition........................................................................................................................................................46
12.2.3 Cooling.......................................................................................................................................................47
12.2.4 Lubrication..................................................................................................................................................47
12.3 Mechanical System....................................................................................................................................48

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1.1 Change Index
This Edition replaces the Operating and Maintenance Manual from 07/92.
This manual has 48 pages and is issued per 01.03.2016
This edition replaces:
Date
Description
07/92
New edition
01.03.2016
Replaces edition from 07/92
1.2 Release
Relased and approved on: 01.03.2016
Dipl.-Ing. P. Stolinski

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2 Introduction
This manual is meant to instruction for proper operation and maintenance of the aircraft engine.
Modifications to the engine are only permitted with the approval of our development department.
Caution:
The specially identifies safety notes must be observed to prevent accidents with personal
injuries and to prevent damage to the engine.
Please also observe the instructions of the aircraft manufacturer. They are specially adapted for opera-
tion of the engine in the aircraft.
Caution:
Familiarize yourself with the layout of the engine controls in your aircraft according to the
instructions of the aircraft manufacturer. Pay special attention to those controls needed to
master an emergency situation.

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3 Engine Description
•Horizontally Opposed 4-Cylinder 4-Stroke Reciprocating Engine
•Ram Air Cooling
•Wet Sump Forced Lubrication
•Single or Dual Magneto Ignition
•Direct Propeller Drive
•Electrical Starter
•Alternator
•Mechanical Fuel Pump
•Constant Pressure Carburetor
3.1 Model Designation
L
2000
E
A
1
.
X
X
1.
2.
3.
4.
5.
6.
7.
1. LIMBACH (Manufacturer)
2. Displacement Class in cm3
3. (E) Single Ignition
(D) Dual Ignition
4. Equipment - Basic Type of Construction
0 = Tractor Propeller
Carburetor rear, bottom
Alternator rear
Starter rear
A = Tractor Propeller
Carburetor rear, top
Generator front
Starter front
B = Tractor Propeller
2 Carburetors rear, top
Generator rear
Starter rear
C = Pusher Propeller
Carburetor rear, bottom
Alternator rear
Starter rear
D = Tractor Propeller
Carburetor rear, bottom
Generator front
Starter front

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5. Type of Propeller Flange
1 = Flange for Variable-Pitch Propeller
2 = Flange for Fixed-Pitch Propeller
6 + 7. Installation
Type Differences with regard to installation related changes
X = Experimental Engine without Certification
AA = Variant for powered glider GROB G 109
AB = Variant for powered glider VALENTIN TAIFUN
AC = Variant for powered glider HOFFMANN H 36 DIMONA

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3.2 Cylinder Designation
I
=
front = propeller side
II
=
right
III
=
rear = accessory mounting side
IV
=
left
1
=
cylinder 1
2
=
cylinder 2
3
=
cylinder 3
4
=
cylinder 4

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4 Technical Data
4.1 LIMBACH L 2000 E0
Dimensions
Bore
90 mm
Stroke
78,4 mm
Displacement per Cyl.
498,5 cm³
Total Displacement
1994 cm³
Compression Ratio
8,4 : 1
Crankshaft Rotation
counterclockwise
Magneto Timing
30° BTC
Firing Order
1-3-2-4
Equipment
Magneto
SLICK 4230
SLICK 4330, P/N: 170.120.020
BENDIX S4RN21
Spark Plugs
EYQUEM A 755
LIMBACH LB-N41.0
LIMBACH LB-K-2, P/N: 170.123.104 (unshielded)
LIMBACH LB-K-3, P/N: 170.123.105 (shielded)
Ignition Harness
SLICK-High-Temperature-Harness
LIMBACH, P/N: 170.123.022 (unshielded)
LIMBACH, P/N: 170.123.020 (shielded)
Carburetor
STROMBERG ZENITH 150 CD 3
Fuel Pump
APG - LIMBACH
LIMBACH, P/N: 170.090.013
Alternator
DUCELLIER 14V-28A, P/N: 170.113.001
BOSCH 14V-33A, P/N: 201.113.005
BOSCH 14V-55A
BOSCH 28V-35A
MOTOROLA 14V-40A
Starter
FIAT 0.7kW
BOSCH 1.4kW
MAGNETON 1kW, P/N: 250.143.010
Oil Pump
Geared Pump
Oil Filter
Oil Screen
Propeller Flange for E01
201.031.310
Propeller Flange for E02
202.031.320
Note:
Preferred propellers:
Fixed-Pitch Propeller:
Hoffmann HO11*/HO11A
Mühlbauer MT
Variable-Pitch Propeller:
Hoffmann HO-V62
Mühlbauer MTV-1
By means of the adapter 202.032.320, the
propeller flange for E01 may be used
for fixed pitch propellers for E02, too.

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Max. Take-Off Power
59 kW / 80 shp @ 3400 RPM
Max. Continuous Power
51 kW / 70 shp @ 3000 RPM
Engine Rotational Speeds
Max. permissible speed
3400 RPM
Max. speed for cruise
See flight and maintainance manual
of airframe manufacturer.
Min. continuous speed
2300 RPM
Idle speed
800 ± 100 RPM
Fuel and Oil
Fuel
see section 10
Engine Oil
see section 10
Pressures and Temperatures
Fuel Pressure
0.1 to 0.15 bar / 1.45 to 2.17 psi
Engine Oil Pressure max.
4 bar / 58 psi
Engine Oil Pressure min.
1 bar / 14.5 psi @ 2500 RPM
Engine Oil Temperature max.*)
120 °C
Engine Oil Temperature min
50 °C (indicated)
Engine Oil Temperature opt.
appr. 80 °C
Cylinder Head Temperature max.*)
250 °C
Cylinder Head Temperature opt.
150 to 170 °C (at cruise)
Oil Charge
Engine Oil Charge max.
2.5 l
Engine Oil Charge min.
1.5 l
*)
The max. permissible temperatures constitute operating limitations to be maintained for a short
period of time only. Continuous operation of the engine at these temperatures may impair engine life.

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4.2 LIMBACH L 2000 EA
Dimensions
Bore
90 mm
Stroke
78,4 mm
Displacement per Cyl.
498,5 cm³
Total Displacement
1994 cm³
Compression Ratio
8,6 : 1
Crankshaft Rotation
counterclockwise
Magneto Timing
30° BTC
Firing Order
1-3-2-4
Equipment
Magneto
SLICK 4230
SLICK 4330, P/N: 170.120.021
BENDIX S4RN21
Spark Plugs
EYQUEM A 755
LIMBACH LB-N41.0
LIMBACH LB-K-2, P/N: 170.123.104 (unshielded)
LIMBACH LB-K-3, P/N: 170.123.105 (shielded)
Ignition Harness
SLICK-High-Temperature-Harness
LIMBACH, P/N: 170.123.022 (unshielded)
LIMBACH, P/N: 170.123.020 (shielded)
Carburetor
STROMBERG ZENITH 150 CD 3
Fuel Pump
APG - LIMBACH
LIMBACH, P/N: 170.090.014
Alternator
DUCELLIER 14V-28A, P/N: 170.113.005
Starter
BOSCH 0,4kW
BOSCH 1,4kW
SJCE 0,4kW
SJCE 0,9kW
MAGNETON 1kW, P/N: 202.143.030
Oil Pump
Geared Pump
Oil Filter
Oil Screen
Propeller Flange for EA1
202.031.300
Propeller Flange for EA2
202.031.320
Note:
Preferred propellers:
Fixed-Pitch Propeller:
Hoffmann HO11*/HO11A
Mühlbauer MT
Variable-Pitch Propeller:
Hoffmann HO-V62
Mühlbauer MTV-1
By means of the adapter 202.032.320, the
propeller flange for EA1 may be used
for fixedpitch propellers for EA2, too.

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Engine Ratings
Max. Take-Off Power
59 kW / 80 shp @ 3400 RPM
Max. Continuous Power
51 kW / 70 shp @ 3000 RPM
Engine Rotational Speeds:
Max. permissible speed
3400 RPM
Max. speed for cruise
See flight and maintainance manual
of airframe manufacturer.
Min. continuous speed
2300 RPM
Idle speed
800 ± 100 RPM
Fuel and Oil
Fuel
see section 10
Engine Oil
see section 10
Pressures and Temperatures
Fuel Pressure
0.1 to 0.15 bar / 1.45 to 2.17 psi
Engine Oil Pressure max.
4 bar / 58 psi
Engine Oil Pressure min.
1 bar / 14.5 psi @ 2500 RPM
Engine Oil Temperature max.*)
120 °C
Engine Oil Temperature min
50 °C (indicated)
Engine Oil Temperature opt.
appr. 80 °C
Cylinder Head Temperature max.*)
250 °C
Cylinder Head Temperature opt.
150 to 170 °C (at cruise)
Oil Charge
Engine Oil Charge max.
2.5 l
Engine Oil Charge min.
1.5 l
*)
The max. permissible temperatures constitute operating limitations to be maintained for a short
period of time only. Continuous operation of the engine at these temperatures may impair engine life.

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4.3 LIMBACH L 2000 EB
Dimensions
Bore
90 mm
Stroke
78,4 mm
Displacement per Cyl.
498,5 cm³
Total Displacement
1994 cm³
Compression Ratio
8,4 : 1
Crankshaft Rotation
counterclockwise
Magneto Timing
30° BTC
Firing Order
1-3-2-4
Equipment
Magneto
SLICK 4230
SLICK 4330, P/N: 170.120.020
BENDIX S4RN21
Spark Plugs
EYQUEM A 755
LIMBACH LB-N41.0
LIMBACH LB-K-2, P/N: 170.123.104 (unshielded)
LIMBACH LB-K-3, P/N: 170.123.105 (shielded)
Ignition Harness
SLICK-High-Temperature-Harness
LIMBACH, P/N: 170.123.022 (unshielded)
LIMBACH, P/N: 170.123.020 (shielded)
Carburetor
2 x STROMBERG ZENITH 150 CD 3
Fuel Pump
APG - LIMBACH
LIMBACH, P/N: 170.090.013
Alternator
DUCELLIER 14V-28A, P/N: 170.113.001
BOSCH 14V-33A, P/N: 201.113.005
Starter
FIAT 0.7kW
BOSCH 1.4kW
MAGNETON 1kW, P/N: 250.143.010
Oil Pump
Geared Pump
Oil Filter
Oil Screen
Propeller Flange for EB1
201.031.310
Propeller Flange for EB2
202.031.320
Note:
Preferred propellers:
Fixed-Pitch Propeller:
Hoffmann HO11*/HO11A
Mühlbauer MT
Variable-Pitch Propeller:
Hoffmann HO-V62
Mühlbauer MTV-1
By means of the adapter 202.032.320, the
propeller flange for EB1 may be used
for fixedpitch propellers for EB2, too.

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Engine Ratings
Max. Take-Off Power
59 kW / 80 shp @ 3400 RPM
Max. Continuous Power
53 kW / 72 shp @ 3000 RPM
Engine Rotational Speeds
Max. permissible speed
3400 RPM
Max. speed for cruise
See flight and maintainance manual
of airframe manufacturer.
Min. continuous speed
2300 RPM
Idle speed
800 ± 100 RPM
Fuel and Oil
Fuel
see section 10
Engine Oil
see section 10
Pressures and Temperatures
Fuel Pressure
0.1 to 0.15 bar / 1.45 to 2.17 psi
Engine Oil Pressure max.
4 bar / 58 psi
Engine Oil Pressure min.
1 bar / 14.5 psi @ 2500 RPM
Engine Oil Temperature max.*)
120 °C
Engine Oil Temperature min
50 °C (indicated)
Engine Oil Temperature opt.
appr. 80 °C
Cylinder Head Temperature max.*)
250 °C
Cylinder Head Temperature opt.
150 to 170 °C (at cruise)
Oil Charge
Engine Oil Charge max.
2.5 l
Engine Oil Charge min.
1.5 l
*)
The max. permissible temperatures constitute operating limitations to be maintained for a short
period of time only. Continuous operation of the engine at these temperatures may impair engine life

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4.4 LIMBACH L 2000 EC
The technical data of the LIMBACH L 2000 EC model are identical to the technical data of
the LIMBACH L 2000 E0 model.
"C" indicates the changes concerning the axial bearing for rear engine installation
(pusher propellers).
Due to the rear installation (pusher), the propeller shaft rotation is changed to clockwise
(in direction of flight).

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4.5 LIMBACH L 2000 DA
Dimensions
Bore
90 mm
Stroke
78,4 mm
Displacement per Cyl.
498,5 cm³
Total Displacement
1994 cm³
Compression Ratio
8,5 : 1
Crankshaft Rotation
counterclockwise
Magneto Timing
25° BTC
Firing Order
1-3-2-4
Equipment
Magneto
2 x SLICK 4201
2 x SLICK 4301, P/N: 205.120.110
Spark Plugs
EYQUEM A 755 L
LIMBACH LB-L41.0
LIMBACH LB-L-2, P/N: 205.123.103
Ignition Harness
SLICK-High-Temperature-Harness
LIMBACH, P/N: 205.123.012 *)
LIMBACH, P/N: 205.123.022 **)
Carburetor
STROMBERG ZENITH 150 CD 3
Fuel Pump
APG - LIMBACH
LIMBACH, P/N: 170.090.014
Alternator
DUCELLIER 14V-28A, P/N: 170.113.005
Starter
BOSCH 0,4kW
BOSCH 0,7kW, P/N: 171.143.005
SJCE 0,4kW
SJCE 0,9kW
Oil Pump
Geared Pump
Oil Filter
Oil Screen
Propeller Flange for DA2
202.031.320
Note:
Preferred propellers:
Fixed-Pitch Propeller:
Hoffmann HO11*/HO11A
Mühlbauer MT
*)
left
**)
right

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Engine Ratings
Max. Take-Off Power
55 kW / 75 shp @ 3200 RPM
Max. Continuous Power
51 kW / 70 shp @ 3000 RPM
Engine Rotational Speeds
Max. permissible speed
3400 RPM
Max. speed for cruise
See flight and maintainance manual
of airframe manufacturer.
Min. continuous speed
2300 RPM
Idle speed
800 ± 100 RPM
Fuel and Oil
Fuel
see section 10
Engine Oil
see section 10
Pressures and Temperatures
Fuel Pressure
0.1 to 0.15 bar / 1.45 to 2.17 psi
Engine Oil Pressure max.
4 bar / 58 psi
Engine Oil Pressure min.
1 bar / 14.5 psi @ 2500 RPM
Engine Oil Temperature max.*)
120 °C
Engine Oil Temperature min
50 °C (indicated)
Engine Oil Temperature opt.
appr. 80 °C
Cylinder Head Temperature max.*)
250 °C
Cylinder Head Temperature opt.
150 to 170 °C (at cruise)
Oil Charge
Engine Oil Charge max.
2.5 l
Engine Oil Charge min.
1.5 l
*)
The max. permissible temperatures constitute operating limitations to be maintained for a short
period of time only. Continuous operation of the engine at these temperatures may impair engine life

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5 Performance
5.1 Performance Graph LIMBACH L 2000 E0 and L 2000 EC

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5.2 Performance Graph LIMBACH L 2000 EA

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5.3 Performance Graph LIMBACH L 2000 EB