Troubleshooting: 7-4
3.0 Turns over but will not start; there is spark. (To check for spark, refer to engine
manual.)
Possible Cause Solution
3.1 Fuel is not reaching the
carburetor.
Test for power to the fuel pump. Refer to Electrical
Section.
If power is present, inspect the fuel pump. Replace if
necessary.
Inspect the fuel lines between the source and the
carburetor. Repair or replace as necessary.
3.2 The carburetor solenoid is
faulty.
Test for power to the solenoid. Refer to Electrical
Section.
If power is present, inspect the solenoid. Replace if
necessary.
3.3 The engine is ooded. Pull the throttle cable completely and crank until the
engine starts.
3.4 The spark plugs are worn
or dirty.
Inspect and replace as necessary.
3.5 None of the above. Refer to a qualied service technician for further
troubleshooting.
4.0 Will not come up to normal operating rpm (Engine should be adjusted to run at
3,150 rpm under a vacuum load of 0” Hg.)
Possible Cause Solution
4.1 The throttle linkage is out
of adjustment.
Inspect for broken or loose linkage. Repair or replace
as necessary.
4.2 Excessive load on the
engine.
Inspect and clean the recovery tank lters.
Inspect the recovery tank to the blower hose. Repair
or replace as necessary.
4.3 Excessive back pressure
on the engine exhaust.
Inspect for blockage in the heat exchanger. Clean or
replace as necessary.
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