LCT 79cc Manuale utente

LCT Engines

Service Manual

PGM45015 12/04/17 rev G

ENGINEERING A NEW

GENERATION OF POWER

Table of Contents

Engine Model Number & Serial Numbering System 2-3

General Speciﬁcations 4-5

General Troubleshooting 6-7

Advanced Troubleshooting (for authorized LCT technicians) 8-10

Spark Plug Service 10

Engine Oil Level Check 11

Engine Oil Change 11

Engine Oil Recommendations 11

Maintenance Schedule 12

Torque Speciﬁcations 13-14

Summer Engine Dimensions 15-20

79cc 15

136cc 16

179cc / 208cc 17

291cc 18

414cc 19

420cc 20

Winter Engine Dimensions 21-25

136cc 21

179cc / 208cc (Gen II) 22

254cc 23

291cc / 306cc 24

369cc / 414cc 25

Current Patents: D596649; D634,337; D611,411; D593,190; D635,585, D549,241; RE43920; RE45,913; D572,659; D595,227; 9328696; 7975806; D580610; D590,110S; D627,368; D585,348;

D600,252; D604,686; 201030127679.3; 200830020200.9; 200830299875.1; 201530458407.4; 201520911505.3; 201630277717; 201620636943.8; 201620636960.1; 201620636872.1; 201620636858.1;

201620528656.5; 201620583290.1; 201620616109.2; 200720046150.1; 200820217113.7; 200820214886.X; 200820217112.2; 200820214887.4; 200920040686.1; 200920038850.5; 200920044163.4;

201020258898.X; 200730184074.6; 200730184075; 200830021742.8; 200830023405.2; 200830028283.6; 200830299876.6; 200830299874.7; 200830299873.2; 200930031746.9; 200930036278.4;

200930035200; 201030127696.7; 201030127678.9; 201030127608.3; 200910210967.1; 201130459836.5; 201130500118.8; 201130459770.X; 201220024217.2; 201220042903.2; 201220186503.9;

201220218354.X; 201230237494.7; 201230271026.1; 201420342024.0; 201420633124.9; 201430417951.X; 201520233712.8; 201530103964.4; 201530225241.1; 201530225068.5; 201530225179.6;

201520911627.2; 201621429154.3; 201621429150.5; 201621429142.0; 201630636079.7; 201630636165.8; 201630636136.1; 201621326210.0; 201621429144.X; 201630636166.2

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.

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

Engine Serial Number Sequence

16 95H 03 00001 A:

Example:

Engine Serial Number 1695H0300001A represents:

16: 2016

95H: 306cc Horizontal Engine Series

03: March

00001: 1st Engine Produced During Month of March

A: Horizontal Assembly Line

Assembly Line Designation (A, B, C, D)

Sequential Engine Number

Produced Month

Engine Series Designation

Produced Year

Plant Design Family

Crankshaft

Shaft HP Paint Code Starter Type Options Emissions Label Pack Code

P LM Moderate H Horizontal T Threaded 150

[1.5hp (63cc)]

1 - JPC Black Recoil

(Standard JPC Black)

E - 12VDC/

120VAC Electric

A - Fixed Speed E1 - 50 State S - Single Pack

S LO ***Hybrid V Vertical K Straight-Keyed 175

[ 1.75hp (79cc) ]

2 - Black Tank

(Pantone Black G (Glossy))

P- Recoil B - Manual Choke E2 - 49 State M - Multi-Pack

DLX Extended P Tapered 200

[ 2.0hp (87cc) ]

3 - Titan Yellow Blower Housing Z - Recoil/

Electric Provision

C - Catalytic Mufﬂer E4 - California Preempt

LD Diesel S Splined (No Attach.) 250

[ 2.5hp (98cc) ]

4 - Black Blower Housing (Pantone

Black G (Glossy))

Y - 220VAC Electric D - Generator Air Filter E5 - California Exh Only

W1 GEN I Snow G1 2:1 Reduction (GEAR) 350

[ 3.5hp (106cc) ]

5 - Yellow Recoil

(Pantone 1235C)

X - 12V DC with Starter Box E - Generator Mufﬂer E7 - European Compliant

W2 GEN II Snow G2 6:1 Reduction (GEAR) 400

[ 4.0hp (136cc) ]

6 - Yellow Tank

(Pantone 1235C)

V - [TBD] F - No Tank E8 - Australian Compliant

W3 Single Stage

Snow 1

G3 2:1 Reduction (CHAIN) 500

[ 5.0hp (179cc) ]

7 - Black Tank

(Pantone Black M (Matte))

U - [TBD] G - High Oil Fill Tube E9 - South East Asia

W4 *Snow King G4 2:1 Reduction (CLUTCH) 650

[6.5hp (208cc) ]

8 - Black Blower Housing (Pantone

Black M (Matte))

T - [TBD] H - Commercial Fuel Tank (Large

Fuel Tank)

EA - Canadian Compliant

W5 **Snow King 750

[7.5hp (254cc) ]

9 - Yellow Blower Housing

(Pantone 1235C)

S -[TBD] I - AC Charging Coil Equipped EB - NON CERTIFIED

W6 Private Label

Snow

850

[ 8.5hp (291cc) ]

1A - Titan Green Blower Housing

(Pantone Green 364C)

J - DC Charging Coil Equipped E12 - [TBD]

W7 Ariens Single

Stage

950

[ 9.5hp (306cc) ]

1B - Titan Green Recoil

(Pantone Green 364C)

K - Evaporative Emission Equipped E13 - [TBD]

W8 GEN III Snow 1000

[ 10.0hp (369cc) ]

1D - XH Black Recoil

(Pantone Black M (Matte))

L - Coaxial Idle Down Equipped E14 - [TBD]

ID Inverter Design

Engine

1250

[ 12.5hp (414cc) ]

1C - Carmine Red Blower Housing

(RAL 3002)

M - Remote Throttle Control E15 - [TBD]

1300

[13.0hp (420cc) ]

1E - Blue Recoil

(PMS 294C)

N - High Ouput Air Filter - Non CA

CI219A

[ 4hp (219cc) ]

1F - Blue Fuel Tank

(PMS 294C)

O - Snow Equipped

CI306

[ 6hp (306cc) ]

1G - Blue Blower Housing

(PMS 294C)

P - Pleated Paper Air Filter

CI306A

[ 7hp (306cc) ]

1H - Titan Orange Blower Housing Q - No Low Oil Sensor

CI418

[ 8hp (418cc) ]

1I - Titan Orange Recoil R - Low Temperature Mufﬂer

CI418A

[ 9hp (418cc) ]

IJ - Sliver Recoil

(Titan Spec Silver)

S - Atm. Vented Plastic Fuel Cap w/

Tether Cord

CI219

[ 3.5hp (219cc)]

1K - Sliver Blower Housing

(Titan Spec Silver)

T - Two Low Oil Fill Plugs

CI219A

[4.0hp (219cc)]

1L - [TBD] U - Upgrade Bearing

CI435A

[ 9hp (435cc) ]

1M - [TBD] V - Viton Oil Seals

1N - XH Black Recoil (Pantone

Black G (Glossy)

X - Single Stator Charging System

1O - Yellow Fuel Tank

(PMS B1046)

Y - Dual Stator Charging System

1P - JPC Black Recoil (Lightweight

Recoil Design)

Z - CE Compliance Package

1Q - [TBD] 1 - Integrated On/Off Speed Controls

1R - [TBD] 2 - Remote Choke

1S - [TBD] 3 -2.7L Fuel Tank

1T - [TBD] 4 - 3.6L - Fuel Tank

1U - [TBD] 5 - 60W AC Alternator

1V - [TBD] 6 - ROV Fuel Tank Equipped

1W - [TBD] 7 - Reduced Sound Mufﬂer Package

1X - [TBD] 8 - [TBD]

1Y - [TBD] 9 - Front Oil Drain Tube

1Z - [TBD] 10 - [TBD]

2A - [TBD] 11 - [TBD]

2B - [TBD]

2C - [TBD]

2D - Yellow Recoil (Yellow C)

2E - Yellow Blower Housing

(Yellow C)

2F - Yellow Fuel Tank (Yellow C)

2G - Blue Recoil (PMS 287C)

2H - Blue Blower Housing

(PMS 287C)

2I - Blue Fuel Tank (PMS287C)

2J - [TBD]

2K - [TBD]

2L - [TBD]

2M - [TBD]

2N - [TBD]

2O - [TBD]

2P - [TBD]

Engine Model Number & Serial Numbering System

Model No. PLMHK14650124PBGPSTUVE2M ID Number 920811000

PManufacturing Facility 9Horizontal

LM Moderate Design Family 208 cc Displacement

HHorizontal Crankshaft 1Summer

KKeyed PTO design 1000 Sequential Number

14 #14 Crankshaft Drawing

650 6.5hp (208cc) engine

1Black Recoil (Glossy)

2G Blue Recoil (PMS287C)

2Black Tank (Glossy)

4Black Blower Housing (Glossy)

PPull Start

BManual Choke

GHigh Oil Fill Tube

PPleated Paper Air Filter

SAtmosphere Vented Plastic Fuel

Cap w/ Tether Cord

TTwo Low Oil Fill Plugs

UC&U Bearings

VViton Oil Seals

E2 49 State Compliant

MMulti-Pack

EXAMPLE

Both Model & ID Numbers to be

on PMI & Speciﬁcation Sheet

NOTES:

* W4 DESIGNATOR IS USED FOR FULL ENGINE DRESSED SNOW KING PLATFORMS

** W5 DESIGNATOR IS USED FOR LIMITED ENGINE DRESSED SNOW KING

PLATFORMS

*** LO DESIGNATOR IS USED FOR SUMMER SPEC ENGINES WITH WINTER SELF

TAPPING MOUNT CYLINDERS

▼ ▼

General Speciﬁcations

Item 79cc 136cc 179cc 208cc 223cc 254cc

Maximum Speed 3850±50rpm 3850±50rpm 3850±50rpm 3850±50rpm 3850±50rpm 3600±50rpm

Idle Speed 2050+/-50rpm 2050+/-50rpm 2050+/-50rpm 2050+/-50rpm 2050+/-50rpm 2050+/-50rpm

Compression Ratio 8.5:1 8.5:1 8.5:1 8.5:1 8.5:1 8.5:1

Displacement 79cc 136cc 179cc 208cc 223cc 254cc

Compression Release yes yes yes yes yes yes

Cast Iron Sleeve yes yes yes yes yes yes

Bore x Stroke 2.02" x 1.49" (51.4mm

x 38mm)

2.44" x 1.77" (62mm x

45mm)

2.55" x 2.13" (65mm x

54mm)

2.76" x 2.13" (70mm x

54mm) 70x58 2.99" x 2.2" (76mm x

56mm)

PTO Rotation CCW (measured from

PTO side)

CCW (measured from

PTO side)

CCW (measured from

PTO side)

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

regular unleaded

gasoline

regular unleaded

gasoline

regular unleaded

gasoline

Low Oil Shutoff if equipped if equipped if equipped if equipped yes if equipped

Fuel Shutoff Valve yes yes yes yes yes yes

Oil Fill Capacity 13oz 16oz 16oz 16oz 16oz 20oz

Spark Plug Gap 0.7-0.8mm (.027-.030

in.)

0.7-0.8mm (.027-.030

in.)

0.7-0.8mm (.027-.030

in.)

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 0.4 +/- 0.2mm 0.4 +/- 0.2mm 0.4 +/- 0.2mm

Valve Adjustment

(gap) Intake

.11 +/- .02mm (.003-

.005in)

.15 +/- .02mm (.005-

.007in)

.15 +/- .02mm (.005-

.007in)

.15 +/- .02mm (.005-

.007in)

.15 +/- .02mm (.005-

.007 in.)

.15 +/- .02mm (.005-

.007in)

Valve Adjustment

(gap) Exhaust

.13 +/- .02mm (.004-

.006 in.)

.20 +/- .02mm (.007-

.009 in.)

.20 +/- .02mm (.007-

.009 in.)

.20 +/- .02mm (.007-

.009 in.)

.20 +/- .02mm (.007-

.009 in.)

.20 +/- .02mm (.007-

.009 in.)

Dry Weight

(Summer Engines) 22.72 lbs. (10.3kg) 31 lbs. (14.1kg) 35 lbs. (16.6kg) 35 lbs. (16.6kg) 35 lbs. (16.8kg) NA

Dry Weight

(Winter - Gen II / PW2) NA 38 lbs. (17.3kg) 42 lbs. (19.1kg) 42 lbs. (19.1kg) 42 lbs. (19.3kg) 45.23 lbs. (20.5kg)

Dry Weight (Winter

- PW3) NA 30 lbs. (13.6kg) 36 lbs. (16.4kg) 36 lbs. (16.4kg) NA NA

General Speciﬁcations

Item 291cc 306cc 369cc 414cc 420cc

Maximum Speed 3850±50rpm 3850±50rpm 3850±50rpm 3850±50rpm 3850±50rpm

Idle Speed 2050+/-50rpm 2050+/-50rpm 2050+/-50rpm 2050+/-50rpm 2050+/-50rpm

Compression Ratio 9:1 9:1 8.1:1 8.1:1 8.1:1

Displacement 291cc 306cc 369cc 414cc 420cc

Compression Release yes yes yes yes yes

Cast Iron Sleeve yes yes yes yes yes

Bore x Stroke 3.15" x 2.28" (80mm x

58mm)

3.22" x 2.28" (82mm x

58mm)

3.34" x 2.55" (85mm x

65mm)

3.54" x 2.56" (90mm x

65mm)

3.54" x 2.59" (90mm x

66mm)

PTO Rotation CCW (measured from PTO

side)

CCW (measured from PTO

side)

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 regular unleaded gasoline regular unleaded gasoline

Low Oil Shutoff if equipped if equipped if equipped if equipped if equipped

Fuel Shutoff Valve yes yes yes yes yes

Oil Fill Capacity 32oz 32oz 38oz 38oz 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.) 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 0.4 +/- 0.2mm 0.4 +/- 0.2mm

Valve Adjustment

(gap) Intake

.15 +/- .02mm (.005-

.007in)

.15 +/- .02mm (.005-

.007in)

.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.)

.20 +/- .02mm (.007-.009

in.)

.20 +/- .02mm (.007-.009

in.)

Dry Weight

(Summer Engines) 57.32 lbs. (26kg) 57.32 lbs. (26kg) 69.45 lbs. (31.5kg) 69.45 lbs. (31.5kg) 69.45 lbs. (31.5kg)

Dry Weight

(Winter - Gen II / PW2) 61 lbs. (27.7kg) 61 lbs. (27.7kg) 72 lbs. (32.7kg) 72 lbs. (32.7kg) 72 lbs. (32.7kg)

Dry Weight (Winter - PW3) NA NA NA NA NA

General Troubleshooting

Engine will not start:

1. Check oil level- Do you have the correct amount of oil? (Ref: Engine Oil Service, pg. 10)

Remedy: Oil should be visible and to the top 2 threads of the LOWEST oil ll spout.

2. Is on/off switch on?

Remedy: Turn to the on position per engine specication.

3. Snow Only:

a) Is the Run/Stop switch in the Run Position?

Remedy: Push switch to the Run Position.

b) Is the snow safety key inserted into slot?

Remedy: Push key into slot to fully engage.

4. Do you have fuel in the fuel tank?

Remedy: Add fuel.

5. Is the fuel petcock turned to the on position?

Remedy: Turn to the on position.

6. Was the engine choked?

Remedy: When starting the engine the choke lever should be pushed left to the on

position, and after starting, pushed right to the off position. If engine is equipped with

twist type choke, the knob should be turned clockwise to the start position, and after

starting, turned counter-clockwise 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?

Remedy: Slide over spark plug and t securely.

8. Has the fuel being used been purchased within the last 30-days and was it stored in a plastic container?

Remedy: Replace old fuel with new fuel.

9. Is the engine ooded?

Remedy: Remove spark plug and replace with any of the spark plugs listed under Spark Plug Service, pg. 9.

• NOTICE

Using an incorrect spark plug may cause engine damage.

1 2 3 4

STA RT

OFF

START

RUN

SnowTwist Choke Summer

General Troubleshooting

Engine stops running:

1. Has the fuel being used been purchased within the last 30-days and was it stored in a plastic container?

Remedy: Replace old fuel with new fuel.

2. Is the air lter dirty?

Remedy: Replace air lter element if dirty. Clean prelter of any dirt or dust per engine specication.

3. Was the engine choked?

Remedy: When starting the engine the choke lever should be pushed left to the on

position, and after starting, pushed right to the off position. If engine is equipped with

twist type choke, the knob should be turned clockwise to the start position, and after

starting, turned counter-clockwise to the run position. If engine still does not start

move to half choke and pull twice.

4. Is the spark plug corroded?

Remedy: Remove spark plug and replace with any of the plugs listed under Spark Plug Service, pg.9.

• NOTICE

Using an incorrect spark plug may cause engine damage.

5. Has the engine run out of fuel?

Remedy: Refuel engine.

6. Is the fuel petcock turned to the on position?

Remedy: Turn to the on position.

7. Is the throttle set too low (variable speed models only)?

Remedy: Increase the throttle per engine specication.

Snow Summer

1 2 3 4

STA RT

OFF

START

RUN

Twist Choke

Advanced Troubleshooting – For Authorized LCT Technicians

ENGINE

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

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

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