HydraMaster Steamatic 8800 TMU, Owner'S Manual, Page: 88 / 148

Systems Troubleshooting - 8-6
Steamatic 8800 TMU
runs rough at high speed 4.
4.1. The spark plug(s)
are faulty. Remove and inspect the plugs. Clean or replace as
necessary.
4.2. The spark plug
wire(s) are faulty. Inspect the wires and connectors for damage or loose
connections. Repair or replace as necessary.
4.3. Inadequate fuel
supply to the carburetor.
Check for blockage in the filter. Repair or replace as
necessary.
4.4. Poor connection to
coils. Verify there is a good contact with each of the wires to the
coils.
runs rich (black smoke) 5.
5.1. A dirty air filter
Inspect and replace as necessary.
5.2. excessive back
pressure
Inspect for a clogged heat exchanger, dirty air filter or a
partially opened choke.
engine overheats 6.
6.1. Poor ventilation in
the van open all the van doors.
Install a roof vent in the van.
Remove any dividers or other objects impeding airflow
around the truckmount.
6.2. low oil level
Check the level and fill as necessary.
6.3. excessive back
pressure on the engine
exhaust Inspect for blockage in the heat exchanger. Clean or
replace as necessary.
6.4. low coolant Check radiator level
Check overflow bottle level
6.5. Poor coolant mixture Check the coolant with a test to determine mixture; adjust
as necessary.