Chapter 2: Basic Troubleshooting
16
Repairing the problem
The third step in the troubleshooting process is to
repair the problem. This step consists of:
1. Form a diagnosis by using all of the information
gathered from the troubleshooting that was per-
formed.
2. Physically perform the repair.
The fourth, and hopefully final, step in the troubleshoot-
ing process is the follow through. This step consists of:
1. Thoroughly test the repaired equipment: con-
firming that the initial diagnosis was correct. If it
was wrong start the troubleshooting process
over again.
NOTE: Sometimes the engine will have multiple
problems at the same time. By performing one
repair, other issues may show up that are unre-
lated to the first repair.
2. Delivery to customer: We are not just repairing
equipment, we are repairing customers.
A Inoculate against recurring problem with
education, e.g... if the problem was caused
by stale fuel, make sure the customer is
aware that fuel goes bad over time.
B. Make sure the customer understands the
repair, preventing “superstitious” come-
backs.
Prime test
To perform a prime test:
1. Prime the engine through the carburetor throat
using a squirt bottle, filled with clean fresh gaso-
line.
NOTE: Inspect the air filter while priming the
engine. Look for a dirty or plugged filter that
could prevent air flow or a missing filter that
would indicate dirt ingestion.
2. Make sure the ignition switch or safety bail is in
the run position.
3. Attempt to start the engine.
4. If the engine starts and runs long enough to burn
the prime, the problem is effectively isolated to
the fuel system. proceed to Chapter 4: The Fuel
System and Governor.
5. Check ignition system as described in Chapter
7: Ignition System.
If the ignition system is working, check the compres-
sion or perform a leak down test.
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