2-Cycle Troubleshooting - Tecumseh LEV90 Basic Troubleshooting And Service Information

Two Cycle Troubleshooting
The following is provided as a basic troubleshooting guide. Its use requires a complete review of all conditions
and symptoms. Always examine the exterior for clues: leaks, excessive dirt, or obvious damage. Some repairs will
require the assistance of a Tecumseh Servicing Dealer.
Preparation
Before troubleshooting any system problem, see original equipment manufacturer's (O.E.M.) instructions.
Make your troubleshooting easier by preparing as follows:
• Work in a clean, well-lighted place.
• Keep proper tools and materials nearby.
• Keep an adequate supply of clean petroleum-based solvent.
To reduce the risk of serious injury or death from fires and/or explosions, NEVER use flammable
solvents (e.g., gasoline) to clean serviceable parts. Use a water-based, non-flammable solvent
such as Tecumseh Degreaser Cleaner.
NEVER use compressed air to clean debris from yourself or your clothing. When using compressed
CAUTION
air to clean or dry serviceable parts:
• Wear appropriate eye protection.
• Use only approved air blow nozzles.
Wet
Defective spark plug
Restricted air filter
Improper fuel mix or stale fuel
Sheared or partially sheared
flywheel key
Carburetion problems due to
flooding, over priming, etc.*
Ignition System
Crankcase seals or gaskets leaking
Should more extensive repair be needed, we recommend you contact a local Tecumseh Servicing Dealer for repair.
Repair manuals are also available from your local dealer or direct from Tecumseh. A complete list of the available
manuals can be found at the end of this book.
NOTE: Refer to Technician's Handbook for a more detailed list of remedies.
• Air pressure must not exceed 30psi (206kPa).
• Shield yourself and bystanders from flying debris.
FUEL SYSTEM
Engine Will Not
Start
Check if spark plug is
wet or dry
Review with customer priming or choking
procedure (3-5 primes, if equipped, waiting 2
seconds between each prime)
If equipped with a choke, check for full travel.
Check throttle cable and control for proper
Check fuel supply and fuel cap vent
Damaged reed, port plugs, seals or gaskets
13
Dry
adjustment.
Carburetion problem*
(bad bowl gasket)
Restriction in fuel system
(filter, screen)
Poor compression