How change oil in installed generator - no access?

[Rdubs]

Hi everyone,
I have a Jeanneau Sun Odyssey 469. It has a Cummins Onan generator set installed just forward of the transom. The operator's manual for the generator says to change the oil, remove the front cover of the generator and there is a valve at the bottom where you drain the oil out. However, that front cover is facing the transom and there is only about three inches of clearance. So I can't figure out any way to get the cover off to access the drain.
Anyone ever had to change the oil on a setup like this? How did you do it?









Many thanks,
'Dubs

[belizesailor]

Vaccum oil extractor via the dip stick tube. There are a bunch of different makes & models. Handy for many other things on a boat too.

https://www.amazon.com/slp/best-oil-...hagxfusm5sz83f

[Rdubs]

Thanks Belize. I checked the manual and it says the dipstick is that big yellow knob, which means I'd need like a 1" hose or something to connect. It doesn't look like the small opening like on my Yanmar motor dipstick. On my Yanmar I use that small dipstick hole to suck the oil out but not sure that would work here?

[Cat36Mahalo]

You use a small tube on the extractor 1/8 ID is fine and shove to bottom of engine - connect to vacuum extractor.

[Wood]

With a robust hose or it will collapse under vacuum

[gonesail]

use an extractor and wait a long time for the pump to suck it all out