how many days can I run my AC for

[Gregmaz]

81 Brave with 69 gallons and a auto shutoff at unknown level, running the original coleman AC for 6 to 8 hours a day, how many days? The gen set is an onan 4v
thx

[Kayjulia]

I don't know your fuel consumption it could be as much as a gallon an hour most likely less. When the tank get to 1/4 the Generator fuel pipe won't be able to reach the fuel left in the tank and the generator will stop and it will get very quiet and hot!

[Murf2u]

In big round numbers in crayon.

An 4k Onan running a single 13.5k btu a/c unit will be running at 30% load when the compressor is cycling only, otherwise about 15%. According to Onan this unit consumes about 0.5 gal / hour at 50% load, at no load it's about 0.3 gal / hour.

Since the ratio between compressor run time and fan only is entirely dependent on temp and thermostat setting it's impossible to determine your use.

If you 'guess-timate' that the generator will be running at an average of 25% load for 8 hours a day it would look something like this;

8 hours x 0.4 gal / hour = 3.2 gal / day.

Most units have generator fuel line set at 1/3rd level of tank, so 69 gal x .66 = ~45 gallons useable by the generator.

45 gallons / 3.2 (gal per day) = 14 days.

YMMV.

I know in my case (based on the generators Hobbs meter) it will run for ~80 hours before the fuel level drops too far and it starves out.

[Gregmaz]

The outside temp will b around 100•, this old Coleman cranked to max, I think from what I am reading that I ll get my 7 days of AC at 8 hours a day.
Will watch out for filter and plug and hope the safety cutoff is set to 1/4 tank.
Thx for replies