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Generac 40G Oil Drain Question?

Sagebrush
Explorer
Explorer
I acquired a used trailer and I can't find the little Generac's oil drain. There are no holes underneath with a plug. Its a Guardian RV 40G, best I can tell you unbolt the filler neck and drain through it? Or take the hose off the fill? Very odd set up to have no drain plug out the bottom. Its nothing like my past Onan with the drain plug underneath, but the little sucker does have a spin on oil filter.
3 REPLIES 3

Sagebrush
Explorer
Explorer
I don't have a drain plug for the oil, so the only way I can change the oil is by extraction pump. Thats a first for me. I also can't get to the fuel filter, no room for the deep socket or a ratchet. I guess I'll have to pull the generator out to replace the fuel filter someday.

At least the fuel out of the pump looks clean, hoses look okay. But, I'm really missing my old Onan 5500. Much easier to service. Never had a single cylinder Onan though, I wonder if their design is any better? This Generac 40G is a pain to work on. Its going to be difficult to disconnect the wiring and fuel line to pull it, there is very little access.

Sagebrush
Explorer
Explorer
I do have a 12 volt oil drain pump thingie I got off Amazon, maybe it still works. Haven't used it in years. There is no access to a drain plug, if there is one under there maybe I can drill an access hole.

I figure the hose was removed from the filler side to drain. The hose clamp is out of position on the back side of the filler port thing. The whole bottom pan is gummy/sticky with oil. But the motor is itself looks dry. I've never owned a Generac 40G, so its a learning curve. It doesn't supply power consistently, it needs a new 30 amp breaker I think. I flip the old breaker back and forth a few times and it will work for a while. Of course it ran perfectly when I bought the trailer, then 5 hours of run time later it started acting up.

handsome51
Explorer
Explorer
Sagebrush wrote:
I acquired a used trailer and I can't find the little Generac's oil drain. There are no holes underneath with a plug. Its a Guardian RV 40G, best I can tell you unbolt the filler neck and drain through it? Or take the hose off the fill? Very odd set up to have no drain plug out the bottom. Its nothing like my past Onan with the drain plug underneath, but the little sucker does have a spin on oil filter.

My Generac has a plug at the bottom of where the dip stick screws in. But if you don't have one. Just use one of those jugs you pump up and put the hose down where the dip stick hole is and just suck the oil out.