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Home›Engines›Cummins/Onan F7RTC

Cummins/Onan F7RTC Engine Engine

The Cummins/Onan F7RTC is a 0.34 L engine rated at 3000 rpm. It powers generator sets from Cummins/Onan, including the Onan P4500i, P4500 and P5000E. It holds 1.16 L (0.3 gal) of oil.

Also known as: Cummins F7RTC

0.34 L
Displacement
3000 rpm
Rated speed
1.16 L
Oil capacity

Engine specifications

Oil capacity1.16 L
Displacement0.34 L
Rated speed3000 rpm

Generator sets powered by this engine

3
Cummins/Onan Onan P4500iCummins/Onan P4500Cummins/Onan P5000E

Common problems

10
  • NO DC OUTPUT
    Cause: Tripped DC circuit breaker
    Fix: Disconnect battery, reset breaker and have battery tested for shorts
  • NO AC OUTPUT
    Cause: Tripped AC circuit breaker
    Fix: Remove all loads, reset breaker, check loads for defects. Do not exceed generator set rating.
  • Generator set not level
    Fix: Move generator set to level surface
  • Fouled spark plug
    Fix: Remove and clean or replace spark plug
  • ENGINE WON'T START
    Cause: Low oil level
    Fix: Add oil as necessary
  • ENGINE SURGES
    Cause: Dirty fuel strainer
    Fix: Have the strainer cleaned
  • ENGINE STOPS
    Cause: Low oil level
    Fix: Add oil as necessary
  • ENGINE DOES NOT CRANK (ELECTRIC START)
    Cause: Bad battery connection
    Fix: Clean and tighten battery connections
  • ENGINE CRANKS SLOWLY (ELECTRIC START)
    Cause: Load is connected
    Fix: Disconnect load while starting
  • BLACK EXHAUST
    Fix: Contact an Onan service center

Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan F7RTC.

Maintenance schedule

ItemSpecCapacityPart #Interval
Air filter—300 hr find
Fuel filter— find
Oil filter— find
Belt— find
CoolantCheck/Clean—
OilAPI performance Class SL or SJ engine oil or better1.16 L—20 hr

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Common questions

What is the oil capacity of the Cummins/Onan F7RTC?

The Cummins/Onan F7RTC engine has an oil capacity of 1.16 liters.

What is the displacement of the Cummins/Onan F7RTC?

The Cummins/Onan F7RTC has a displacement of 0.34 liters.

Which generators use the Cummins/Onan F7RTC engine?

The Cummins/Onan F7RTC powers 3 generator set(s), including Cummins/Onan Onan P4500i, Cummins/Onan P4500, Cummins/Onan P5000E.

How often should you change the oil in the Cummins/Onan F7RTC?

The Cummins/Onan F7RTC oil change interval is every 20 hours.

What is a common problem with the Cummins/Onan F7RTC engine?

A commonly reported issue on generators using the Cummins/Onan F7RTC is: NO DC OUTPUT. Cause: Tripped DC circuit breaker. Fix: Disconnect battery, reset breaker and have battery tested for shorts.