Engine Air Cleaner; Exhaust System Maintenance; Fuel System Maintenance - Briggs & Stratton FORTRESS Series Installation And Operation Manual

10. Install the spark plugs and tighten them to 180 in/lbs (20
Nm).
11. Connect the negative (-) cable at the battery.
12. Install the 15 Amp fuse into the fuse holder at top of the
control box.
13. Install the roof.
14. Restore utility power to the generator.
15. Push the ON/OFF Switch on the side of the generator to
the "ON" (I) position.
16. Set the generator mode to AUTO.

Engine Air Cleaner

WARNING
Gaseous vapors are extremely flammable and
explosive. Fire or explosion can cause severe burns or
death.
• Never start and run the engine with the air cleaner
assembly (if equipped) or the air filter (if equipped)
removed.
1. Push the ON/OFF Switch on the side of the generator to
the "OFF" (0) position.
2. Remove utility power to the generator to de-energize the
battery charger.
3. Remove the roof.
4. Remove the 15 Amp fuse from the fuse holder at top of
the control box.
5. Disconnect the negative (-) cable at the battery.
6. Remove filter cartridge.
7. Clean the outlet tube and check the Dust Unloader Valve
(if equipped) - Use a clean cloth to wipe the filter sealing
surface and the outlet tube surfaces. Make sure that all
contaminant is removed before the new filter is inserted.
Do not damage the sealing area on the tube. Check and
squeeze the Dust Unloader Valve that is attached to the
service cover to make sure it is flexible and not inverted,
damaged or plugged.
8. Clean the filter - Use a soft bristle brush to loosen dirt and
a vacuum cleaner to remove dirt and debris. Replace the
filter cartridge if you find any holes in the filter media.
9. Install the clean filter correctly - Insert the filter carefully.
Seat the filter by hand. Make sure it is completely seated
in the air cleaner housing before you put the cover in
place.
10. Install the service cover. Make sure that all mounting
bands, clamps, bolts, and connections in the entire air
cleaner system are tight and make sure there are no
holes in piping - repair if needed.
11. Connect the negative (-) cable at the battery.
12. Install the 15 Amp fuse into the fuse holder at top of the
control box.
13. Install the roof.
14. Restore utility power to the generator.
15. Push the ON/OFF Switch on the side of the generator to
the "ON" (I) position.
16. Set the generator mode to AUTO.

Exhaust System Maintenance

WARNING
Contact with muffler area could cause burns resulting
in serious injury.
• DO NOT touch hot parts and AVOID hot exhaust gases.
• Allow equipment to cool before touching.
When inspecting the exhaust system, check the following:
• Inspect the exhaust manifold at the cylinder head for
leaks.
• Check that all retaining bolts and shields (if used) are in
place.
• Inspect the fasteners between the manifold and the
exhaust pipe to make sure they are tight and that there
are no exhaust leaks. Repair as necessary.
• Inspect exhaust pipe connection for leaks. Repair as
necessary.
It is a violation of California Public Resource Code, Section
4442, to use or operate the engine on any forest-covered,
brush-covered, or grass-covered land unless the exhaust
system is equipped with a spark arrester, as defined in
section 4442, maintained in effective working order. Other
states or federal jurisdictions may have similar laws;
reference Federal Regulation 36 CFR Part 261.52.

Fuel System Maintenance

WARNING
Propane and Natural Gas are extremely flammable
and explosive, which could cause burns, fire or explosion
resulting in death or serious injury.
• Inspect the fuel system periodically.
• NO leakage is permitted.
• DO NOT operate engine if smell of fuel is present.
Pressure Regulator
The pressure regulator components have been specifically
designed and calibrated to meet the fuel system requirements
of the engine.
If the regulator fails to operate or develops a leak, it must
be repaired or replaced with the OEM recommended
replacement parts. When inspecting the regulator, check the
following:
• Check for any fuel leaks at the inlet and outlet fittings.
• Check for any fuel leaks in the regulator body.
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