Onan 4K fuel consumption

The Onan spec sheet here:

https://powersuite.cummins.com/PS5/PS5Content/SiteContent/en/Binary_Asset/pdf/Consumer/specsheets/a-1399.pdf

says it should burn 0.5 Gal/hr at half load (putting out 16.65 amps) and 0.7 Gal/hr at full load (putting out 33.3 amps).

Just as reference, this "roughly" means that it will run your air conditioner for about 2 hours on one gallon of gas.

It's true that it will use .3 gal/hr, no load to .8 gal/hr full load.
No matter what model/Series it is.

Figure a gallon an hour. It will burn that or less :C

Not true for all units. This is why we need to know what unit.

rvten wrote: "Not enough to worry over."

Unless you are below about 1/4 tank on gasoline.

From the factory owners manual for Onan 4 kw 60 HZ gas gennys:

.3 gal/hr, no load
.5 gal/hr half load
.7 gal/hr full load

From the factory owners manual for Onan 4 kw 60 HZ LPG gennys:

.4 gal/hr no load
.6 gal/hr half load
.7 gal/hr full load

for 50 hz gennys, slightly less.

Chum lee

Not enough to worry over

Propane, or gasoline?

A 4K what. BF,BFA,CCK,KY, Series P. Really helps to know what you have.

Around 3/4 gallon an hour under full load.