Compact Power Boxer 427W - Manual (Page 78)

6-7-06 - Fifth Proof
5-4
Troubleshooting
Engine Troubleshooting**
When engine trouble occurs, check the simple causes which, at first, may seem too obvious to
be considered. For example, a starting problem could be caused by an empty fuel tank. Some
general common causes of engine troubles are listed below.
Problem Possible Causes Corrective Action
Engine Cranks But Will
Not Start
• Empty fuel tanks. • Fill fuel tanks
• Fuel shut-off valves closed. • Open both fuel shut off
valves.
• Poor fuel, dirt or water in the
fuel system.
• Drain fuel system and
replace with fresh, clean fuel.
• Clogged fuel line • Clean or replace fuel lines.
• Spark plug leads
disconnected
• Check to make sure that both
spark plug leads are securely
attached to the spark plug
and that they are not
damaged.
• Faulty spark plugs. • Replace spark plugs.
• Faulty ignition module(s). • Test and replace faulty
ignition module. See engine
manual.
• SMART-SPARK™
malfunction (applicable
models).
• See engine manual.
• Carburetor solenoid
malfunction.
• See engine manual.
• Diode in wiring harness failed
in open circuit mode.
• See engine manual.
• Vacuum fuel pump vacuum
malfunction, or oil in hose.
• See engine manual.
• Vacuum hose to fuel pump
leaking/cracked.
• Replace hose.
• Battery connected
backwards.
• Remove battery connections
and reinstall.
Engine Starts But Does
Not Keep Running
• Restricted fuel tank cap vent. • Clean fuel tank cap.
• Replace fuel cap
• Poor fuel, dirt or water in the
fuel system.
• Drain fuel system and
replace with fresh, clean fuel.