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

Four 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.
Defective spark plug
Use Tester 670366
Restricted air filter
Improper or stale fuel
Exhaust ports plugged
Carburetion problems due to flooding,
over priming, etc.*
Ignition System
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.
FUEL SYSTEM
Engine Will Not Start
Check if spark plug is wet or
Wet
• Air pressure must not exceed 30psi (206kPa).
• Shield yourself and bystanders from flying debris.
dry
Review with the customer proper
priming procedure (3-5 primes,
waiting 2 seconds between each
If equipped with a choke, check for full
travel. Check throttle cable and control
for proper adjustment.
Check fuel supply and fuel cap vent
Restriction in fuel system (filter)
Carburetion problem*
(bad bowl gasket)
Poor Compression
10
Dry
prime)