Toro V User manual

V-ENGINE SERVICE MANUAL
Table of Contents – Page 1 of 3
ABOUT THIS MANUAL
SAFETY INFORMATION
SPECIFICATIONS
ENGINE SPECIFICATIONS
ENGINE FASTENER TORQUE REQUIREMENTS
CARBURETOR SPECIFICATIONS
SPECIAL TOOL REQUIREMENTS
SPECIAL TOOL REQUIREMENTS - REQUIRED SERVICE SUPPLIES
TORO 2-CYCLE V ENGINE TOOL REQUIREMENTS
TROUBLESHOOTING
ENGINE WILL NOT START WHEN "COLD"
ENGINE WILL START WHEN "COLD", BUT NOT WHEN "HOT"
ENGINE WILL NOT PRODUCE SPARK
ENGINE FLOODED WITH FUEL
ENGINE HAS LOW COMPRESSION
ENGINE LACKS POWER
ENGINE SURGES
ENGINE BACKFIRES
ENGINE OVERHEATS
ENGINE VIBRATES EXCESSIVELY
ENGINE CRANKSHAFT WILL NOT TURN
ENGINE PRODUCES MECHANICAL KNOCKING SOUND
ENGINE PRE-IGNITES
ENGINE SMOKES EXCESSIVELY
ENGINE STALLS
SPARK PLUG FOULED
MAINTENANCE
RECOMMENDED MAINTENANCE SCHEDULE
AIR FILTER - CLEANING
SPARK PLUG
SPARK PLUG GAP
SPARK PLUG TORQUE
EXHAUST SYSTEM - CLEANING
REASSEMBLING
PRIMER START CARBURETOR
TROUBLESHOOTING - ENGINE STARTS HARD
ENGINE RUNS RICH
ENGINE RUNS LEAN
FUEL LEAKS FROM CARBURETOR
INTRODUCTION - IDENTIFICATION

V-ENGINE SERVICE MANUAL
Table of Contents – Page 2 of 3
PRIMER START CARBURETOR - Continued
OPERATION
GOVERNOR
GOVERNOR ADJUSTMENT
SERVICING - PRELIMINARY CHECK
DISASSEMBLY
CLEANING AND INSPECTION
ASSEMBLY
INSTALLATION
PRESETTING THE GOVERNOR
SERVICING THE AIR FILTER
FUEL SYSTEM
OPERATION - FUEL TANK
FUEL CAP
SERVICE - FUEL CAP
TANK REMOVAL
CLEANING
TANK INSTALLATION
FUEL STORAGE
IGNITION SYSTEM
TROUBLESHOOTING - PROCESS
SPARK PLUG - OPERATION
SERVICE
CD PACK - ADVANTAGES
OPERATION
AIR GAP ADJUSTMENT
REMOVAL/INSTALLATION
FLYWHEEL - OPERATION
REMOVAL
INSTALLATION
REWIND STARTER
OPERATION
RECOIL ASSEMBLY REPLACEMENT
STARTER ROPE REPLACEMENT
ENGINE
ADVANTAGES/DESCRIPTION
OPERATION
SERVICE TIPS - CYLINDER/CRANKCASE HALVES
OIL SEALS
CORE PLUGS
MUFFLER BAFFLE

V-ENGINE SERVICE MANUAL
Table of Contents – Page 3 of 3
ENGINE - Continued
MUFFLER PLATE SCREWS
EXHAUST PORTS
CARBURETOR GASKETS
REMOVAL
DISASSEMBLY
INSPECTION AND REPAIR
REED VALVE SERVICE
REASSEMBLY
REINSTALLING EXTERNAL COMPONENTS
PIVOTING ZONE START BRAKE SYSTEM
PIVOTING ZONE START BRAKE - INTRODUCTION
OPERATION
DISASSEMBLY
ASSEMBLY
APPENDIX
POWER HEAD - EXPLODED VIEW
IGNITION AND EXHAUST - EXPLODED VIEW
STARTER AND PRIMER START CARBURETOR - EXPLODED VIEW
PRIMER START CARBURETOR ASSEMBLY - EXPLODED VIEW

ABOUT THIS MANUAL
ThismanualwaswrittenexpresslyfortheTor0 V Engine.TheTor0Companyhas
made every effortto make the informationinthis manual complete and correct.
This manual was written with the service' technicianin mind. The book isdivided
into two sections, Quick Reference information (specifications, troubleshooting, etc.)
and servicing information (servicing procedures).
We hope you find this manual a valuable additionto your service shop.
If you have
any questions or comments regarding this manual, please contact us at the
following address:
The Toro Company
Consumer Service Department
81 11 Lyndale Avenue South
Bloomington,
MN 55420-1 196
The Tor0 Company reserves the rightto change product specifications or this
manual without notice.
Copyright(R) 1995 The Tor0 Company
All Rights Reserved

Safety Information
This safety symbol means WARNING or PERSONAL SAFETY
INSTRUCTION
- read the instruction becauseit has to do with your
safety. Failure to comply with the instruction may resultinpersonal
injury or even death.
This manualisintended as a service and repair manual only. The safety
instructions provided herein are for troubleshooting, service and repairof the engine
only. The Operator’s Manual will containsafetyinformation onthecomplete product
powered by theTor0
2- Cycle V engine. Operator’s Manuals with complete
instructions are available through:
The Tor0Company
Publications Department
81 1 Lyndale Avenue South
Bloomington, MN
55420-1 196 U.S.A.
Avoid unexpected starting of the
engine
....
Always turn off the powered product and
disconnect the spark plug before attempting
cleaning, adjustment or repair.
Avoid lacerations and amputations ...
Stay clear of all moving parts when the
engine isrunning. Treat all normally
moving parts as if they were moving
whenever the engineis running or has the
potential to start.
Avoid burns ...
Do not touch the engine whileit is running
or shortly afterithas been running.
Avoid falls ...
Do not operate the powered product on
slippery surfaces or
if footing is
questionable.
Avoid fires ...
Wipe up any spilled fuel or oil immediately.
Avoid asphyxiation ...
Never operate an engineina confined area
without proper ventilation.
Avoid fires and explosions
...
Use a container designed for gasoline.
Avoid spilling fuel and never smoke while
working with any type of fuel.
Avoid accidental misuseof fuel. ..
Always store fuelina properly labeled
container designed for gasoline.
Avoid injury due to inferior parts ...
Use onlyTOR0original parts to ensure that
important safety criteria are met.
Avoid injury to bystanders ...
Always clear the area of bystanders before
starting or testing powered equipment.
Avoid injury due to projectiles ...
Always clear the area of sticks, rocks, or
any other debris that could be picked up
and thrown by the powered equipment.
Keep all safety shieldsin place
Avoid modifications ...
Never alter or modify any part unlessit is a
factory approved procedure.
Avoid unsafe operation ...
Always test the safety systems after making
adjustments or repairs on the machine.

QUICK REFERENCE SECTION
Specifications ..............................................
SpecialToolRequirements. ...................................
Troubleshooting ............................................
Maintenance ...............................................
SERVICE SECTION
Primer Start Carburetor. ......................................
Fuelsystem ...............................................
IgnitionSystem ............................................. ~~
Rewind Starter. .............................................
Engine ....................................................
Pivoting Zone StartBrake. ....................................
I
Appendix ..................................................
~~
ReferenceSection 1-1

Engine Specifications. 19
Engine Fastener Torque Requirements 1-4
CarburetorSpecifications1-4
1-2
Reference Section

Engine Specifications
I
I
ReferenceSection 1 -3

Bolt, Blade
Nut, Flywheel
Screw, Air vane
81.6N-m)
Screw, Carburetor mounting
Screw, CD ignition pack
90 110 in lbs(10-12N-m)
Screw,Cylindertocrankcase 105 I 115 in lbs (.I2 I3 N-m
Screws, Engine mounting 350-400in Ibs
(39 45 N-m)
Screw,Groundstrapstop
15 25 inIbs(1.7 2.8
Screw, Muffler cover
150 190 inIbs (I7 22 Nom)-.
Screw, Muffler plate 140 200 in
Ibs (16 22 N-m)
Screw,Reed*
10 13inIbs(1.1-1.5 N-m)
N-m)
~-
65 75in Ibs (7,3-8.4N-m)
Screw, Shroud
20 25 inIbs (2.3 2.8N-m)
*Use thread-locking compound
See page
2.2
Carburetor Specifications
1-4
Reference Section

QUICK REFERENCE SECTION
Specifications
Special
Tool Requirements. 2
Troubleshooting
Maintenance
SERVICE SECTION
Primer Start Carburetor.
Fuelsystem
Ignition System
Rewind Starter.
Engine
Pivoting Zone StartBrake.
Appendix
Reference Section
2-1

REQUIREDSERVICESUPPLIES
2-2
Reference Section

QUICKREFERENCESECTION
Specifications
Special
Tool Requirements.
Troubleshooting
3
Maintenance
SERVICE SECTION
Primer Start Carburetor.
Fuelsystem
Ignition System
Rewind Starter.
Engine
Pivoting Zone StartBrake.
Appendix
Reference Section
3-1

ENGINEWILLNOTSTARTWHEN“COLD” 3-3
ENGINE WILL START WHEN “COLD”, BUT NOT WHEN “HOT” 3-3
ENGINE WILL NOT PRODUCESPARK. 3-3
ENGINEBACKFIRES 3-5
ENGINE OVERHEATS. 3-5
ENGINE VIBRATES EXCESSIVELY. 3-5
ENGINECRANKSHAFTWILL NOTTURN.. 3-5
SPARK PLUG FOULED. 3-7
3-2
Reference Section

ENGINEWILLNOTSTARTWHEN“COLD”
Remedies
Fillwith clean,fresh, properlymixed, unleaded fuel
Drain and flush tank andfloat bowl,
fill tank with
clean fresh unleaded, properly mixed fuel
Clean and backflush fuel tank. Replace fuel tank if
necessary
Wash and re-oil air cleaner element
Replace
thespark plug
See “ENGINE WILL NOT PRODUCE
SPARK table
Check for loose blade
See “ENGINEHASLOW COMPRESSIONtable
See“ENGINE
FLOODED” WITHFUEL”table
Check
ENGINE WILL START WHEN “COLD”, BUT NOT WHEN “HOT”
I
See‘ENGINE-FLOODEDWITHFUEL”table
fuelUse nomorethan
10% ethanolblend
See: ENGINE OVERHEATStable
Clean bowl vent
Reference Section
3-3

ENGINE FLOODED WITH FUEL
ENGINE HAS LOW COMPRESSION
Remedies
severaltimes.. Reinstall plug. Try again.
Let unit sit, retry, or, remove spark plug, pull rope
Adjust
throttle cable
Wash and re-oil cleaner element
Replacespark
plug
Clean carburetor, replace failedparts
Clean
Clean
Dirty plugged main fuel and/or
airbleedcircuits
Remedies
Clean main fuel circuit andall air bleed circuits
Check sealing surfaces, oil
plugs
Checkfiltersandfuel line
3-4
Reference Section

ReferenceSection 3-5

ENGINEPRODUCESMECHANICALKNOCKINGSOUND
Remedies
Inspectand tightenflwheel nutto correct torque
See
“ENG!NE PRE-IGNITES’table
Inspectand repair and tighten-nuts to correct torque
Tightenbolts
Inspect and tighten bladebolt tocorrect torque
ENGINE SMOKES EXCESSIVELY
ENGINE STALLS
Remedies
Refill with fresh fuel-of the correct mixture
Unloadengineand-restart
See “SPARK PLUG FOULED-table
Replace fuel cap
Inspect and repairto removeunwantedground
Clear ventof obstruction
Clear debris from fins or causeof overheating
Refill-with fresh, and
properly mixed,fuel
3-6
Reference Section

SPARK PLUG FOULED
possible Causes
Carburetor running too rich
Clogged air cleaner element
Weakignition
syslem
Worn rings and/or cylinder
Useof leaded fuel
Fuel/oilmixture too rich
Wrong oil
Incorrect spark plug
~-
Usecorrectsparkplug
Clean-!rebuildcarburetor
Clean and re-oil element
or replace
Rebuild engine or
short block
Drain fuel tank and replace with fresh, unleaded
Drain fuel tank and
fill with fuelof correct mixture
Use Tor0 2-Cycle,or
NMMA certified ashlessoil
Replace CD ignition pack
regular fuel, having the correct oil mixture
(32: 1 )
ReferenceSection 3-7

QUICK REFERENCE SECTION
Specifications
Special Tool Requirements.
Troubleshooting
Maintenance
e
SERVICE SECTION
Primer Start Carburetor.
Fuelsystem
Ignition System
Rewind Starter.
Engine
Pivoting Zone StartBrake.
Appendix
Reference Section 4-1