Owner`s manual
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• Disable auto-start systems while refueling, servicing, storing or long-term
parking.
• Perform all service and maintenance work with the generator engine off
and the positive battery cable disconnected. Moving parts can cause
severe personal injury or death, and live wires could cause fatal electrocution.
• Backfeed to utility systems can create serious risks to life or property. Do not
connect the generator to a building electrical system except through an
approved device and after the building’s main breaker is opened.
• Autostart Caution: Be sure to deactivate your autostart system before
storing your RV, conducting electrical maintenance, or handing over your
RV to a service center. To be sure your generator won’t start while conducting
maintenance, follow the Operators Manual and disconnect the remote
electrical harness prior to any service.
Statement Regarding Exhaust Extensions
Cummins Power Generation, manufacturer of Cummins Onan generator products,
does not endorse the use of RV generator exhaust pipe extensions. Like all fuel
burning devices, engine-driven generators emit carbon monoxide (CO) which, if not
safely handled, can produce serious injury or death. Cummins Onan generators, in
conjunction with RV OEM installed tailpipes, are designed to meet RVIA standards
for safely handling exhaust gasses while minimizing noise and maximizing generator
performance. Improper modifi cations to the exhaust components can result in
unreasonable hazards to the vehicle occupants.
Cummins Power Generation has been unable to this date to identify any
commercially available exhaust extension kit which meets reasonable standards for
safely handling exhaust gases.
Cummins Power Generation’s concerns revolve around 6 areas:
1. Weight: Unless entirely self supporting, extensions add weight to the end of the
generator tail pipe which can stress and crack or break the exhaust system parts
that are not designed to carry the additional weight. This could result in exhaust
gases escaping directly under the coach, and therefore could be extremely
dangerous to vehicle occupants.
2. Fit: To be effective conveyors of exhaust, connections & joints must be gas-
tight. Such connections are not guaranteed unless the exhaust extension kit is
properly assembled each time it is used.
3. Exhaust Direction: Because exhaust extensions vent at the roof line, there is a
major concern that exhaust will be sucked in by rooftop air conditioners, vents
and windows.
4. Heat: Many extension designs involve exposed metal that can be a burn hazard
to anyone passing by who might contact the exposed extension pipe.
5. Backpressure: Adding an extension may increase backpressure on the engine,
and thereby reduce engine performance or cause the engine to fail meeting
government-regulated exhaust standards.
6. Warranty: The use of an exhaust extension kit may void the Cummins Onan
warranty.
I: Important Safety Precautions
Please read your generator Operator’s Manual carefully so you understand all the
precautions for safe, effi cient operation. Most accidents occur from failing to follow
fundamental safety rules. In general:
• Exhaust gas is deadly. Check all exhaust system connections regularly for
leaks and tighten them as necessary. Do NOT operate the generator with a
faulty exhaust system.
• If your RV bottoms out on a driveway or road object, inspect the generator
exhaust system for damage. The tail pipe must extend past the edge of the
vehicle.
• Always operate the generator in an area where the wind will carry away the
exhaust fumes.
• Never sleep with the generator running unless the RV is equipped with an
operating carbon monoxide detector.
• Don’t store anything, especially gas, oil, rags or other fl ammable materials, in
the generator compartment.
• Keep the exhaust and air intake free from obstructions such as clothing, furni-
ture or other material, like road debris.