LCT Engines User manual

LCT Engines
Service Manual

Table of Contents
Engine Model Number & Serial Numbering System 2-3
General Specications 4
General Troubleshooting 5-6
Advanced Troubleshooting (for authorized LCT technicians) 7-9
Spark Plug Service 9
Engine Oil Level Check 10
Engine Oil Change 10
Engine Oil Recommendations 10
Maintenance Schedule 11
Torque Specications 12
208cc Summer Engine Dimensions 13
291cc Summer Engine Dimensions 14
414cc Summer Engine Dimensions 15
208cc Snow Engine Dimensions 16
291cc Snow Engine Dimensions 17
414cc Snow Engine Dimensions 18
Exploded Parts Drawings 19-30

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 2
The rst two lines of an engine’s number is the model number. It is alphanumeric and engraved on the side of the block to the right of
the recoil. The third line is alphanumeric and is also the serial number.
Serial Number Definitions:
r 5IFFOHJOFTFSJBMOVNCFSDPOTJTUTPGUPBMQIBOVNFSJDDIBSBDUFSTFYBNQMF)
r 'JSTUUXPEJHJUTZFBSQSPEVDFE
r /FYUUXPUPUISFFEJHJUTFOHJOFIPSTFQPXFS
r /FYUUXPEJHJUTNPOUIQSPEVDFE
r -BTUàWFEJHJUTTFRVFODFOVNCFSPGFOHJOF
%FàOJUJPOPGFYBNQMF5IJTFOHJOFJTUIFUI)1FOHJOFQSPEVDFEJO'FCSVBSZPG
LCT Engine Model Numbering System Definition (see chart on page 3):
1. Preproduction - This column is coded and reserved for prototype engines only.
2. Plant - This column is coded and used for LCT internal use only.
3. Design Family - This column is used for emissions regulations and coded for LCT internal use only.
4. Crankshaft - This column indicated whether the PTO shaft (crankshaft) is congured in the engine horizontally or vertically.
5. Shaft - This column is used for the description of the PTO shaft. This will aid in determining what will be the engine’s primary use.
6. Shaft Detail - This column references a chart that designates which LCT engineering drawing corresponds to the PTO shaft.
This is for LCT internal use only.
7. Horsepower - This column is coded to designate the engine’s power output (horsepower) with its corresponding size
(cubic centimeters).
8. Paint Code - This column is coded to which color scheme the engine is equipped with.
9. Starter Type - This column is coded to which type of starting system the engine is equipped with.
10. Options - This column is coded to designate which equipment options the engine is equipped with.
11. Emissions Label - This column is coded for the emissions standards the engine meets.
12. Pack Code - This column is reserved for LCT Packaging Department only.
NOTE
The LCT Engine Model and Serial Number Systems is subject to be changed or edited at any time.
Engine Model Number & Serial Numbering System
08 60H 02 03611
year
produced
FOHJOF)1 month
produced
sequence number
of engine

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 3
Pre-
Production Plant Design Family Crankshaft Shaft Shaft Detail HP Paint Code
Starter
Type Options Emissions Label
Pack
Code
x P LM Moderate H Horizontal T Threaded XX 150
1.5HP (63cc)
1
Black Recoil (Satin Black (JPC))
E
12VDC/120VAC
Electric
A
Fixed Speed
E1
50 State
S
Single Pack
S LS Intermediate V Vertical K Straight-
Keyed
250
2.5HP (98cc)
2
Black Tank (Pantone Black G
(Glossy))
P
Recoil
B
Manual Choke
E2
49 State
M
Multi-Pack
LX Extended P Tapered 400
4.0HP (136cc)
3
Titan Yellow Blower Housing
Z
Recoil/Electric
Equipped
C
Catalytic Muffler
E4
California
Preempt
LD Diesel 650
6.5HP (208cc)
4
Black Blower Housing (Pantone
Black G (Glossy))
Y
220VAC Electric
D
Generator Air Filter
E5
California Exh
Only
850
8.5HP (291cc)
5
Yellow Recoil
(Pantone 1235C)
X
[TBD]
E
Generator Muffler
E7
European
Compliant
1150
11.5HP (414cc)
6
Yellow Tank
(Pantone 1235C)
V
[TBD]
F
No Tank
E8
European
Compliant
C1219A
4HP (219cc)
7
Black Tank (Pantone Black M
(Matte))
U
[TBD]
G
High Oil Fill Tube
E9
[TBD]
C1306
6HP (306cc)
8
Black Blower Housing (Pantone
Black M (Matte))
T
[TBD]
H
Commercial Fuel Tank
(Large Fuel Tank)
E10
[TBD]
CI306A
7.0HP (306cc)
9
Yellow Blower Housing
(Pantone 1235C )
S
[TBD]
I
AC Charging Coil
Equipped
E11
[TBD]
CI418
8.0HP (418cc)
9
Yellow Blower Housing
(Pantone 1235C )
J
DC Charging Coil
Equipped
E12
[TBD]
CI418A
9.0HP (418cc)
1A
Titan Green Blower Housing
(Pantone Green 364C)
K
Evaporative Emission
Equipped
E13
[TBD]
CI219
3.5HP (219cc)
1B
Titan Green Recoil (Pantone
Green 364C)
L
High Output Air Filter - CA
E14
[TBD]
CI219A
4.0HP (219cc)
1D
Black Recoil (Pantone Black
M (Matte))
M
Remote Throttle Control
E15
[TBD]
1C
Carmine Red Blower Housing
(RAL 3002)
N
High Ouput Air Filter -
Non CA
1E
Blue Recoil
(PMS 294C)
O
Snow Equipped
1F
Blue Tank
(PMS 294C)
P
Pleated Paper Air Filter
1G
Blue Blower Housing (PMS
294C)
Q
No Low Oil Sensor
1H
Titan Orange Blower Housing
R
Low Temperature Muffler
1I
Titan Orange Recoil
S
Atm. Vented Plastic Fuel
Cap w/ Tether Cord
1J
Silver Recoil (Titan Spec Silver)
T
Two Low Oil Fill Plugs
1K
Silver Blower Housing (Titan
Spec Silver)
U
C&U Bearings
1L
Orange Recoil (Titan Spec
Orange)
V
Viton Oil Seals
1M
Orange Blower Housing (Titan
Spec Orange)
X
Single Coil DC Charging
System
1N
[TBD]
Y
Dual Stator Charging
System
Z
CE Compliance Package -
SUMMER SERIES
Engine Model Number & Serial Numbering System

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 4
General Specifications
Item 208cc 291cc 414cc
Maximum Speed 3850±50rpm 3850±50rpm 3850±50rpm
Idle Speed 2150+/-50rpm 2150+/-50rpm 2150+/-50rpm
Compression Ratio 8.5:1 8.2:1 8:1
Displacement 208cc 291cc 414cc
Compression Release yes yes yes
Cast Iron Sleeve yes yes yes
Bore x Stroke 2.76" x 2.13" (70mm x 54mm) 3.15" x 2.28" (80mm x 58mm) 3.54" x 2.56" (90mm x 65mm)
PTO Rotation CCW (measured from PTO side) CCW (measured from PTO side) CCW (measured from PTO side)
Fuel (DO NOT USE E85) regular unleaded gasoline regular unleaded gasoline regular unleaded gasoline
Low Oil Shutoff if equipped if equipped if equipped
Fuel Shutoff Valve yes yes yes
Oil Fill Capacity 16oz 32oz 38oz
Spark Plug Gap 0.7-0.8mm (.027-.030 in.) 0.7-0.8mm (.027-.030 in.) 0.7-0.8mm (.027-.030 in.)
Ignition Air Gap (At Flywheel) 0.4 +/- 0.2mm 0.4 +/- 0.2mm 0.4 +/- 0.2mm
Valve Adjustment (gap) Intake .15 +/- .02mm (.005-.007in) .15 +/- .02mm (.005-.007in) .15 +/- .02mm (.005-.007in)
Valve Adjustment (gap) Exhaust .20 +/- .02mm (.007-.009 in.) .20 +/- .02mm (.007-.009 in.) .20 +/- .02mm (.007-.009 in.)
Dry Weight (Summer Engines) 35lbs (16.6kg) 57.32lbs (26kg) 69.45lbs (31.5kg)
Dry Weight (Snow Engines) 38lbs (17.25kg) 61.5lbs (28.9kg) 75.5lbs (34.3kg)

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 5
General Troubleshooting
Engine will not start:
$IFDLPJMMFWFM%PZPVIBWFUIFDPSSFDUBNPVOUPGPJM 3FG&OHJOF0JM4FSWJDFQH
 3FNFEZ0JMTIPVMECFWJTJCMFBOEUPUIFUPQUISFBETPGUIF-08&45PJMàMMTQPVU
2. Is on/off switch on?
 3FNFEZ5VSOUPUIFPOQPTJUJPO
4OPX0OMZ
a) Is the Run/Stop switch in the Run Position?
  3FNFEZ1VTITXJUDIUPUIF3VO1PTJUJPO
b) Is the snow safety key inserted into slot?
  3FNFEZ1VTILFZJOUPTMPUUPGVMMZFOHBHF
4. Do you have fuel in the fuel tank?
 3FNFEZ"EEGVFM
5. Is the fuel petcock turned to the on position?
 3FNFEZ5VSOUPUIFPOQPTJUJPO
8BTUIFFOHJOFDIPLFE
 3FNFEZ8IFOTUBSUJOHUIFFOHJOFUIFDIPLFMFWFSTIPVMECFQVTIFEMFGUUPUIFPO
position and after starting pushed right to the off position. If engine is equipped with
UXJTUUZQFDIPLFUIFLOPCTIPVMECFUVSOFEUPUIFTUBSUQPTJUJPOBOEBGUFSTUBSUJOH
turned to the run position. If engine still does not start move to half choke and
pull twice.
7. Is the spark plug boot securely fastened to the spark plug?
 3FNFEZ4MJEFPWFSTQBSLQMVHBOEàUTFDVSFMZ
)BTUIFGVFMCFJOHVTFECFFOQVSDIBTFEXJUIJOUIFMBTUUISFFNPOUITBOEXBTJUTUPSFEJOBQMBTUJDDPOUBJOFS
 3FNFEZ3FQMBDFPMEGVFMXJUIOFXGVFM
9. Is the engine ooded?
 3FNFEZ3FNPWFTQBSLQMVHBOESFQMBDFXJUIBOZPGUIFTQBSLQMVHTMJTUFEVOEFS4QBSL1MVH4FSWJDFQH
t/05*$&
Using an incorrect spark plug may cause engine damage.
ON
OFF
START
RUN
SnowTwist Choke Summer

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 6
General Troubleshooting
Engine stops running:
)BTUIFGVFMCFJOHVTFECFFOQVSDIBTFEXJUIJOUIFMBTUUISFFNPOUITBOEXBTJUTUPSFEJOBQMBTUJDDPOUBJOFS
 3FNFEZ3FQMBDFPMEGVFMXJUIOFXGVFM
2. Is the air lter dirty?
 3FNFEZ3FQMBDFBJSàMUFSFMFNFOUJGEJSUZ$MFBOQSFàMUFSPGBOZEJSUPSEVTU
3. 8BTUIFFOHJOFDIPLFE
 3FNFEZ8IFOTUBSUJOHUIFFOHJOFUIFDIPLFMFWFSTIPVMECFQVTIFEMFGUUPUIFPO
position and after starting pushed right to the off position. If engine is equipped with
UXJTUUZQFDIPLFUIFLOPCTIPVMECFUVSOFEUPUIFTUBSUQPTJUJPOBOEBGUFSTUBSUJOH
turned to the run position. If engine still does not start move to half choke and
pull twice.
4. Is the spark plug corroded?
 3FNFEZ3FNPWFTQBSLQMVHBOESFQMBDFXJUIBOZPGUIFQMVHTMJTUFEVOEFS4QBSL1MVH4FSWJDFQH
t/05*$&
Using an incorrect spark plug may cause engine damage.
)BTUIFFOHJOFSVOPVUPGGVFM
 3FNFEZ3FGVFMFOHJOF
6. Is the fuel petcock turned to the on position?
 3FNFEZ5VSOUPUIFPOQPTJUJPO
7. Is the throttle set too low (variable speed models only)?
 3FNFEZ*ODSFBTFUIFUISPUUMF
Snow Summer
ON
OFF
START
RUN
Twist Choke

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 7
Advanced Troubleshooting – For Authorized LCT Technicians
&/(*/&
Complaint Symptom and possible causes Remedy
Engine will not start, or is
hard to start
Compression too low
1. Valves out of adjustment Adjust
2. Worn valve guides or poor seating of valves Repair or Replace
3. Mistiming valves Adjust
4. Excessively worn piston rings Replace
5. Worn-down cylinder bore Replace
6. Poor seating of spark plug Retighten
7. Failed head gasket Replace
Plug not sparking
1. Fouled spark plug Replace
2. Wet spark plug Dry off
3. Defective ignition coil Replace
4. Spark plug wire damaged Replace
5. Kill switch in “OFF” position Switch to “On”
6. Ignition coil air gap is too wide Reset
7. Ignition coil failure Replace
No fuel reaching the intake manifold
1. Clogged fuel filter or fuel line Replace
2. Dirty/gummed up carburetor Clean
3. Fuel petcock is turned off Turn on
4. Fuel tank is empty Fill
Engine idles poorly 1. Out of adjustment tappet clearance Adjust
2. Poor seating of valves Replace or Repair
3. Defective valve guides Replace
4. Worn down camshaft Replace
5. Too wide spark plug gap Adjust or replace
6. Defective ignition coil Replace
7. Ignition coil air gap too wide Adjust
8. Dirty/gummed up carburetor Clean
9. Stale fuel Replace
Engine stalls easily 1. Dirty/gummed up carburetor Clean
2. Fouled spark plug Replace
3. Clogged fuel line Replace
4. Valves out of adjustment Adjust

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 8
Noisy Engine Excessive Valve Chatter
1. Too large valve clearance Adjust
2. Weakened or broken valve spring Replace
3. Worn tappet or cam lobe Replace
4. Worn and burnt camshaft journal Replace
Noise seems to come from piston
1. Worn down piston or cylinder Replace
2. Fouled with carbon combustion chamber Clean
3. Worn piston pin or piston pin bore Replace
4. Worn piston rings or ring grooves Replace
Noise seems to come from crankshaft
1. Rattling bearings due to wear Replace
2. Worn and burnt main bearings Replace
3. Worn and burnt pin bearing Replace
4. Too large endplay Adjust
Noise seems to come from outside of engine
1. Loose trim item Tighten
Engine runs poorly in high
speed range
Defective engine internal/electrical parts
1. Weakened valve springs Replace
2. Worn camshaft Replace
3. Valve timing out of adjustment Adjust
4. Too narrow spark plug gaps Adjust
5. Defective ignition coil Replace
6. Clogged air cleaner element Replace
7. Clogged fuel line, resulting in inadequate fuel supply
to carburetor
Replace
8. Worn bearings Replace
9. Blown head gasket Replace
10. Ignition coil air gap too wide Adjust
11. Dirty/gummed up carburetor Clean
12. Stale fuel Replace
Defective air flow system
1. Carburetor gasket leak - sucking air causing engine to
run lean
Replace
Engine lacks power Defective engine internal/electrical parts
1. Loss of valve clearance Adjust
2. Weakened valve springs Replace
3. Out of adjustment valve timing Adjust
4. Worn piston ring or cylinder Replace
5. Poor seating of valves Replace
6. Fouled spark plug Replace
7. Incorrect spark plug Replace
8. Clogged air filter element Replace
9. Carburetor gasket leak - sucking air causing engine to
run lean
Replace
10. Too much engine oil Adjust
11. Air fins clogged on engine causing to overheat Remove debris
12. Not enough oil in engine Adjust

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 9
Dirty or heavy exhaust smoke 1. Too much engine oil in the engine Adjust
2. Worn piston rings or cylinder Replace
3. Worn valve guides Replace
4. Scored or scuffed cylinder wall Replace
5. Worn valve stems Replace
6. Defective stem seal Replace
7. Worn oil ring side rails Replace
No spark or poor spark 1. Defective ignition coil Replace
2. Defective spark plug Replace
3. Open-circuit wiring connection Check and repair
Spark plug fouled with carbon 1. Incorrect gasoline Replace
2. Dirty air cleaner element Replace
3. Too cold spark plug Use hotter plug
Spark plug becomes fouled
too soon
1. Worn piston rings Replace
2. Worn piston or cylinder Replace
3. Excessive clearance of valve stems in valve guides Replace
4. Worn valve stem oil seal Replace
Spark plug electrode over-
heated or burnt
1. Too hot spark plug Use colder plug
2. Overheated the engine Tune up
3. Loose spark plug Tighten
4. Too lean fuel mixture Check for air leak
Spark Plug Service
3FDPNNFOEFETQBSLQMVHT5PSDI1MVH'35$
Cross References
 t$IBNQJOHQMVHDSPTTSFGFSFODFJT3/:$TPNFUBCMFTTIPX3/:$$
 t/(,QMVHDSPTTSFGFSFODFJT#13&4
 t#04$)QMVHDSPTTSFGFSFODFJT83%$
 t/05*$&
Using an incorrect spark plug may cause engine damage.
 8IFOFOHJOFJTDPPMEJTDPOOFDUUIFTQBSLQMVHDBQBOESFNPWFBOZEFCSJTGSPNUIFTQBSLQMVHBSFBXJUIIJHIQSFTTVSFBJS
2. Remove the spark plug with a 13/16-inch spark plug wrench.
3. Inspect the spark plug. Replace it if the electrodes are worn or if the insulator is cracked or chipped. Spark plug gap should
be set to 0.027 - 0.030 inches.
4. Install the spark plug carefully to avoid cross threading. Screw in spark plug by hand until it stops turning.
5. Tighten the spark plug with a 13/16-inch spark plug wrench. Tighten 1/4 turn after the spark plug seats.
t/05*$&
A loose spark plug can overheat and damage the engine. Over-tightening the spark plug can damage the threads in the
cylinder head.
6. Attach the spark plug cap. Ensure spark plug cap snaps into place securely.

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 10
Engine Oil Level Check
Check the engine oil level with the engine stopped and with the engine in a level position.
1. Remove either side mounted ller cap dipstick or high oil ll dipstick and wipe it clean.
2. Insert and remove the dipstick without screwing it into the ller neck. Check the oil level shown on the dipstick.
 *GUIFPJMMFWFMJTMPXàMMUPUIFFEHFPGUIFPJMàMMFSIPMFXJUIUIFSFDPNNFOEFEPJM
4. Securely screw in the ller cap/dipstick. Running the engine with a low oil level can cause engine damage.
Always check the engine oil before start up.
Engine Oil Change
%SBJOUIFVTFEPJMXIJMFUIFFOHJOFJTXBSN8BSNPJMESBJOTRVJDLMZBOEDPNQMFUFMZ
Avoid contact with hot oil.
1. Place a suitable container below the engine to catch the used oil then remove the
ller cap/dipstick and the drain plug.
 "MMPXUIFVTFEPJMUPESBJODPNQMFUFMZUIFOSFJOTUBMMUIFESBJOQMVHBOEUJHIUFO
it securely. Do not over tighten. Dispose of used motor oil in a manner that is
DPNQBUJCMFXJUIUIFFOWJSPONFOU8FTVHHFTUZPVUBLFVTFEPJMJOBTFBMFE
container to your local recycling center or service station for reclamation. Do not
UISPXVTFEPJMJOUIFUSBTIQPVSJUPOUIFHSPVOEPSQPVSEPXOBESBJO
 8JUIUIFFOHJOFJOBMFWFMQPTJUJPOàMMUPUIFPVUFSFEHFPGUIFPJMàMMFSIPMFXJUIUIF
recommended oil. (see ll limits right)
t/05*$&
Running the engine with a low oil level can cause engine damage.
4. Securely screw in the ller cap/dipstick.
Engine Oil
Recommendations
Engine oil affects performance and service life. Use 4-stroke automotive
detergent oil.
4"&8JTSFDPNNFOEFEGPSHFOFSBMVTF0UIFSWJTDPTJUJFTTIPXOJO
the chart may be used when the average temperature in your area warrants.
The SAE oil viscosity and service classication are in the API label on the oil
container. The manufacturer recommends you use API SERVICE category
4+FOHJOFPJMPSCFUUFS
'JMMJGPJMJT
CFMPXMFUUFS
i-wPOUIF
mMMFSDBQ
'JMMJGPJM
JTCFMPX
“Add”
POUIF
EJQTUJDL
Max Upper
Level
Max Lower
Level

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 11
NOTE
'PMMPXJOHQSPQFSNBJOUFOBODFJTDSJUJDBMVOEFSFYUSFNF
PQFSBUJOHDPOEJUJPOT
Maintenance Schedule
Normal Operating Conditions (less than 40 hrs. per year)
EACH USE FIRST
MONTH
EVERY
6 MONTHS
ONCE
A YEAR
Engine Oil Level Check
Engine Oil Replace Replace
Air Filter Check Clean / Replace
Spark Plug* Clean Replace
Cylinder/Head Fins Clean
Oil Leaks Check
Bolts Check
Fuel Hose Clamps Check
* Spark plug gap to be set to 0.027 - 0.030 inches.
Extreme Operating Conditions (greater than 40 hrs. per year)
EACH USE EVERY 40 HOURS
Engine Oil Level Check
Engine Oil Replace
Air Filter Check
Spark Plug* Replace
Cylinder/Head Fins Check Clean
Oil Leaks Check
Bolts Check
Fuel Hose Clamps Check
* Spark plug gap to be set to 0.027 - 0.030 inches.

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 12
Torque Specifications
208cc 291cc 414cc
Item Torque (N.M) Torque (N.M) Torque (N.M)
Drain bolt 17-18 (150-160 in-lbs.) 24 (210-220 in-lbs.) 24 (210-220 in-lbs.)
Oil drain tube (if equipped)* 32-33 (280-290 in-lbs.) 32-33 (280-290 in-lbs.) 32-33 (280-290 in-lbs.)
Oil sensor 8 (71 in-lbs.) 8 (71 in-lbs.) 8 (71 in-lbs.)
Oil level cap 3 (27 in-lbs.) 3 (27 in-lbs.) 3 (27 in-lbs.)
Spark plug 20-25 (177-222 in-lbs.) 20-25 (177-222 in-lbs.) 20-25 (177-222 in-lbs.)
Carburetor studs 10-12 (86-106 in-lbs.) 20 (177 in-lbs.) 20 (177 in-lbs.)
Exhaust studs 20-24 (177-212 in-lbs.) 20-24 (177-212 in-lbs.) 20-24 (177-212 in-lbs.)
Pivot bolt M8 22-25 (195-222 in-lbs.) 22-25 (195-222 in-lbs.) 22-25 (195-222 in-lbs.)
Connecting rod bolt 12-14 (106-124 in-lbs.) 20 (177 in-lbs.) 20-24 (177-212 in-lbs.)
Flange bolt 18-24 (160-212 in-lbs.) 18-24 (160-212 in-lbs.) 18-24 (160-212 in-lbs.)
Distributor M6*27 10-12 (86-106 in-lbs.) 10-12 (86-106 in-lbs.) 10-12 (86-106 in-lbs.)
Flange bolt of cylinder head M8*55 36 (27 ft-lbs.) 40-42 (29.5-31 ft-lbs.) 48 (35 ft-lbs.)
Pivot adjusting nut for intake, exhaust valve 10 (86 in-lbs.) 10 (86 in-lbs.) 10 (86 in-lbs.)
Flange bolt for head cover 10-12 (86-106 in-lbs.) 10-12 (86-106 in-lbs.) 10-12 (86-106 in-lbs.)
The bolt for crankcase cover M6*14 10-12 (86-106 in-lbs.) 10-12 (86-106 in-lbs.) 10-12 (86-106 in-lbs.)
Side plate M6*12 8 (71 in-lbs.) 8 (71 in-lbs.) 8 (71 in-lbs.)
Governor support 8 (71 in-lbs.) 8 (71 in-lbs.) 8 (71 in-lbs.)
Carburetor nut M6 7 (62 in-lbs.) 8 (71 in-lbs.) 8 (71 in-lbs.)
Muffler nut M8 24 (212 in-lbs.) 24 (212 in-lbs.) 24 (212 in-lbs.)
Rocker bolt 20-25 (177-222 in-lbs.) 20-25 (177-222 in-lbs.) 20-25 (177-222 in-lbs.)
Cylinder cover bolt (crankcase/ PTO cover) 24 (212 in-lbs.) 24-26 (212-230 in-lbs.) 24-26 (212-230 in-lbs.)
Cylinder head bolt 36 (27 ft-lbs.) 40-42 (29.5-31 ft-lbs.) 48 (35 ft-lbs.)
Flywheel nut 75-80 (55-59 ft-lbs.) 96-102 (71-75 ft-lbs.) 96-102 (71-75 ft-lbs.)
Flange bolt for value cover (head cover) 7 (62 in-lbs.) 12-13 (106-115 in-lbs.) 12-13 (106-115 in-lbs.)
*Torque values are with thread locking compound applied to the threads.

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 13
208cc Summer Engine Dimensions
*Drawings do not accurately represent actual engine appearance.
4-5/16-24UNF
5/16-24UNF
16.250 in (412.75mm)
14.00 in (355.6mm)
11.625 in (295.275mm)
4.17 in [106mm]
3.78 in [96mm]
6.38 in [162mm]
3.625 in [92mm]
BOLT CIRCLE
5/16"-24 thread
3.190 in (81.026mm)
3.475 in (88.265mm)
13.45in (341.63mm)
10.110 in (256.79mm)
12.500" in (317.50mm)
3.05"(77.5mm)
.750 in (19.05mm)
2.4309 in (61.7mm)
Key width
3/16 in (4.76mm)
3.622
41.25+0.025
2.200"
4-5/16-24
7.28" (185mm)
4
.
09"
(140
mm
)
1.97" (50mm)
3.05" (77.5mm)
.20"
(5mm)
.49"
(12.5mm)
2.58" (65.5±0.05mm)
6.34" (162±0.05mm)
6.38" (162mm)

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 14
291cc Summer Engine Dimensions
*Drawings do not accurately represent actual engine appearance.
22.5
29
17
R13
R7
132
90
14
106
ø12
2-ø10.5

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 15
414cc Summer Engine Dimensions
*Drawings do not accurately represent actual engine appearance.
22.5
29
17
R13
R7
132
ø12
2-ø10.5
90
400
485
14
106
432
133±0.03

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 16
208cc Snow Engine Dimensions
*Drawings do not accurately represent actual engine appearance.
''
'
'

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 17
291cc Snow Engine Dimensions
*Drawings do not accurately represent actual engine appearance.
317
70.8 182
145
182
297
260
35
349
100
73 81 0.1
+
-
317
70.8 182
145
182
297
260
35
349
100
73 81 0.1
+
-
+
-
+
-
+
-
+
-
+
-+
-
59+1
0
4.5
3/8-24UNF-2B
60˚
ø/10.5
73.03
+1
0
34
133.5 0.05
65
28 R2
R2 R3
ø30-0.04
-0.06
369.03 296
446
424
133.5 0.05
3º
2º
402
90 0.1 105.5 0.1
ø113 0.15 ø92 0.15
8x5/16-24
9.12-0.13
0
6.4-0.05
0
ø25.4
-0.025
0
2120
118
3781 0.1
+
-
4xø8.9 0
-0.1
N
N
+
-
90 0.1
+
-
90 0.1 +
-
105.5 0.1
+
-
105.5 0.1
208.3
640
220.9
195

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 18
414cc Snow Engine Dimensions
*Drawings do not accurately represent actual engine appearance.
70.8
322
35
359
100
73 103
270
70.8 183
103
225
35
100
73
+
-
+
-
+
-
+
-
+
-+
-
59+1
0
4.5
3/8-24UNF-2B
60˚
ø/10.5
73.03
+1
0
34
133.5 0.05
65
28 R2
R2 R3
ø30-0.04
-0.06
387.03 314
465
249
118
431
133.5 0.05
3º
2º
412
90 0.1 105.5 0.1
ø113 0.15 ø92 0.15
8x5/16-24
9.12-0.13
0
6.4-0.05
0
ø25.4
-0.025
0
22.5
223.2
640
132
236.85
195
29103 0.1
+
-
4xø8.9 0
-0.1
N
N
+
-
90 0.1
+
-
90 0.1 +
-
105.5 0.1
+
-
105.5 0.1

Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 19
208cc Manual Start Summer Engine Service Kit
1 Cylinder Head Assembly SK2081000
2 Push Rod Assembly SK2081001
3 Valve Cover Assembly SK2084500
4 Cylinder Assembly SK2081300
5 Piston Assembly SK2081400
6 Connecting Rod Assembly SK2081500
7 Camshaft System Assembly SK2081600
8 Flywheel Assembly SK2081700
9 Cooling Fan, Flywheel SK2084000
10 Crankshaft Assembly (Keyed) SK2081800
11 Air Filter Assembly of Paper SK2082002
12 Filter Element, Panel Paper SK2082012
13 Muffler Assembly SK2082100
14 Fuel Tank (Black) SK2082200
15 Fuel Petcock SK2082221
16 Oversized Fuel Tank Cap (click style) SKSN0301
17 Carburetor Service Kit SK2082401
18 Ignition Coil Assembly SK2082500
19 Control Module (CDI Box) SK2082750
20 Spark Plug SK2083810
21 On/Off Switch SK2082600
23 Fuel Hose Kit SK2086000
24 Throttle Control Assembly SK2082800
25 Governor Gear Assembly SK2082900
26 Governor Link Assembly SK2083000
27 Governor Arm Shaft Assembly SK2083100
28 Recoil Starter Assembly SK2083200
29 Starter Cup SK2083300
30 Blower Housing Service Kit SK2083400
31 Crankcase Cover Assembly SK2083600
32 Oil Seal Kit SK2083900
34 Spark Plug Boot SK2083800
36 Gasket Kit SK2084300
37 Small Black Dipstick SK2083711
38 Rocker Arm Assy SK2081100
39 Choke Lever, Carburetor SK2082120
40 Non-Removable Oil Plug SK2083705
41 Foam Pre-Filter SK2089001
45 Low Oil Sensor SK2082700
40
*Included with part #1
2*
38*
21
31
32
10
37
525
27
1
17
39
12*
41*
6
20
3
7
19
24
26
23
16
15
14
36
34
18
29
30
4
13
28
11
*Included with part #11
45
8
9
PLMHK14600124PBPSTUVE2M