Woodmizer LT25 Guide

G18 Engine

Safety, Operation, Maintenance

& Parts Manual

LT25/LT27 rev. E1.00 - E3.05

Safety is our #1 concern! Read and understand

all safety information and instructions before oper-

ating, setting up or maintaining this machine.

January 2004

Form #1050

reproduced in any form by any photographic, electronic, mechanical or other means or used in

any information storage and retrieval system without written permission from

Wood-Mizer

8180 West 10th Street

Indianapolis, Indiana 46214

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Table of Contents Section-Page

Table of Contents WMdoc031120 iii

TOC

SECTION 1 ABOUT THIS MANUAL 1-IV

SECTION 1 OPERATION 1-1

1.1 Starting The Engine................................................................................1-1

SECTION 2 MAINTENANCE 2-1

2.1 Maintenance ...........................................................................................2-1

2.2 Safety......................................................................................................2-1

2.3 Cooling System ......................................................................................2-2

2.4 Air Filter & Pre-Cleaner.........................................................................2-2

2.5 Fuel Filter ...............................................................................................2-2

2.6 Battery ....................................................................................................2-3

2.7 RPM Adjustments ..................................................................................2-3

2.8 Miscellaneous Maintenance ...................................................................2-4

SECTION 3 REPLACEMENT PARTS 3-1

3.1 Fuel Tank................................................................................................3-1

3.2 Engine Mount Assembly ........................................................................3-2

3.3 Engine Assembly....................................................................................3-3

3.4 Engine Pulley Guards .............................................................................3-5

INDEX I

1-iv 3/11/20

SECTION 1 ABOUT THIS MANUAL

This manual is provided as a supplement to the equipment manufacturer’s manuals. This

manual provides information specific to the use of this equipment on the Wood-Mizer®

sawmill. Refer to the sawmill operator’s manual and manufacturer's manual before

attempting to operate this equipment.

IMPORTANT! Read the sawmill operator’s manual and engine manu-

facturer’s manual for instructions and safety precautions before oper-

ating this equipment.

The information and instructions given in this manual do not amend or extend the limited

warranties for the equipment given at the time of purchase.

Air Filter Muffler

Serial Number/

Engine Type

250051-1

Starter

Starting The Engine

3/11/20 1-1

SECTION 1 OPERATION

1.1 Starting The Engine

DANGER! Always be sure the blade is disengaged and clear the path

of the blade before starting the engine. Failure to do so will result in

serious injury or death.

DANGER! Operate your engine/machine only in well ventilated

areas.Exhaust gases can cause nausea, delirium and potentially death

unless adequate ventilation is present.

DANGER! Never operate an engine with a fuel or oil leak. The leaking

fuel or oil could potentially come in contact with hot surfaces and ignite

into flames.

WARNING! Do not operate engine without proper and operational

spark arrester/muffler. Sparks emitted from the engine exhaust could

ignite surrounding materials, causing serious injury or death.

CAUTION! EPA Compliant Gas Tanks Only: Always relieve all fuel

pressure inside the tank prior to filling or connecting fuel fittings. Fail-

ure to do so may result in fuel spillage.

CAUTION! EPA Compliant Gas Tanks Only: Disconnect the fuel tank

when not in use, or engine flooding or fuel spillage may result.

1. Close the engine choke by moving the choke lever to the start position.

2. Turn the key switch to the START position and release. Release the key switch to the

RUN position after the engine starts.

3. When the engine starts, slowly open the choke all the way by moving the choke lever to

the off position.

ENGINE SHUTOFF

1. Disengage the clutch handle to stop the blade if necessary.

2. Run the engine for 15 seconds with no load, then turn the key switch to the OFF position.

Maintenance

2-1 3/11/20

SECTION 2 MAINTENANCE

2.1 Maintenance

Refer to the manufacturer’s manual for maintenance intervals and procedures unless oth-

erwise instructed in this manual. Follow the manufacturer’s recommendations for dusty

conditions.

IMPORTANT! This manual only provides information about additional

procedures or procedures to be performed at different time intervals

than found in the manufacturer's manuals. Refer to the manufacturer's

manual for complete maintenance instructions.

WARNING! Clean sawdust from all guards, vents, control

boxes, or any area where sawdust may gather after every

shift. Failure to do so may result in fire, causing death or

serious injury.

2.2 Safety

Use caution when performing maintenance or service to the engine.

DANGER! Always be aware of and take proper protective measures

against rotating shafts, pulleys, fans, etc. Always stay a safe distance

from rotating members and make sure that loose clothing or long hair

does not engage rotating members resulting in possible injury.

DANGER! Engine components can become very hot during operation.

Avoid contact with any part of a hot engine. The exhaust components

of your engine are especially hot during and following operation. Con-

tact with hot engine components can cause serious burns. Therefore,

never touch or perform service functions on a hot engine. Allow the

engine to cool sufficiently before beginning any service function.

WARNING! Remove the blade before performing any engine service.

Failure to do so may result in serious injury.

WARNING! Always wear proper and necessary safety equipment

when performing service functions. Proper safety equipment includes

eye protection, breathing protection, hand protection and foot protec-

tion.

Maintenance

Cooling System

Maintenance 3/11/20 2-2

This symbol identifies the interval (hours of operation) at which each maintenance pro-

cedure should be performed. "AR" signifies maintenance procedures which should be

performed as required.

2.3 Cooling System

Wash the engine or brush off sawdust and debris every 50 hours of operation. Clean the

grass screen, cooling fins, and external surfaces. Remove any dust, dirt or oil. See

engine manual for further instructions.

2.4 Air Filter & Pre-Cleaner

WARNING! Always wear proper and necessary safety equipment

when performing service functions. Proper safety equipment includes

eye protection, breathing protection, hand protection and foot protec-

tion.

Service the pre-cleaner every four hours of operation. Service by gently shaking excess

sawdust and debris from the foam piece.

Clean the air filter (air cleaner element) and pre-cleaner (element wrapper) every eight

hours of operation. See the engine manual for further instructions.

Replace the air filter (cleaner) every 200 hours of operation.

Replace the pre-cleaner (element wrapper) every 2000 hours of operation.

2.5 Fuel Filter

Replace the fuel filter every 100 hours of operation or as required for engine perfor-

mance.

200

2000

100

Maintenance

Battery

2-3 3/11/20 Maintenance

2.6 Battery

Check the battery electrolyte level every 50 hours of operation. See manufacturer’s man-

ual for instructions.

DANGER! Batteries expel explosive gases. Keep sparks, flames,

burning cigarettes, or other ignition sources away at all times. Always

wear safety goggles and a face shield when working near batteries.

Failure to do so will cause serious injury.1

WARNING! Battery posts, terminals and related accessories contain

lead and lead compounds, chemicals known to the State of California

to cause cancer and reproductive harm. Wash hands after handling.

2.7 RPM Adjustments

WARNING! Remove the blade before performing any engine service.

Failure to do so may result in serious injury.

Check the RPM with a tachometer every 200 hours of operation.

See Table 2-1.

Before checking the RPM, make sure belt and brake strap tensions are correct (See Saw-

mill Maintenance). Also check oil, fuel, and coolant levels.

Make sure the throttle cable does not affect the engine RPM when the clutch handle is

disengaged. Make sure the cable is not bent or kinked.

1. Start the engine to measure the low-end RPM.

2. Refer to the engine manual to adjust the low-end RPM.

Engine High End RPM Low End RPM

G18 3750 1800

TAB LE 2- 1

200

Maintenance

Miscellaneous Maintenance

Maintenance 3/11/20 2-4

3. Engage the clutch handle to throttle the engine and measure the high-end RPM. The

high-end RPM is factory-set at 3750. Readjust the throttle cable if necessary to increase

or reduce the high-end engine speed.

2.8 Miscellaneous Maintenance

Inspect the spark plugs every 100 hours of operation. Remove any deposits and adjust

gap if necessary. See engine manual for further information.

Review the manufacturer's engine manual for maintenance intervals.

100

Replacement Parts

Fuel Tank

3-1 25G1801doc031120 Replacement Parts

G18

SECTION 3 REPLACEMENT PARTS

3.1 Fuel Tank

REF DESCRIPTION (Indicates Parts Available In Assemblies Only) PART # QTY.

TANK ASSEMBLY, 5-GALLON RED GASOLINE A12285 1

1 5 gallon gas can assemblies are available only for customers with sawmills and edgers manufactured prior to 2010. Customers with

sawmills and edgers manufactured in 2010 and later need to use new EPA approved 3 or 6 gallon gas can assemblies.

1Tank, 5-Gallon Red Fuel P12167 1 

2Pickup, 9" Fuel P12172 1

3Cap, 3 or 5-Gallon Fuel Tank P09683 1

4Fitting, 1/4" NPT Plastic Female Disconnect P12175 1

5Fitting, 3/8” NPT Hex Plug P10367 2

2 Plug fitting P10367 added 11/03. Hole added to fuel tank to accommodate return line for fuel injected engines.

6 HOSE, 1/4” ID FUEL P642 6.5 Ft

7 CLAMP, 7/32 - 1/2 HOSE P649 2

8 FITTING, 1/4" NPT PLASTIC MALE DISCONNECT P12176 3

3 Replacement requires qty. 1 hose clamp (P649).

3H0415C

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