Jj505 has good and bad information. Honda GX25 is a 4 stroke motor, with oil lubricated crankcase. Oil drains out the filler. Oil and gas do not mix on this four stroke. The PDF below is the Honda manual. http://www.smallenginewarehouse.com/images/manuals/GX25-35.pdf
The same place you put the oil in and drain it out.Turn up side down if you find oil port,may be a gas/oil mix ratio which in that case no oil change ever needed
Answers & Comments
Jj505 has good and bad information.
Honda GX25 is a 4 stroke motor, with oil lubricated crankcase.
Oil drains out the filler.
Oil and gas do not mix on this four stroke.
The PDF below is the Honda manual.
http://www.smallenginewarehouse.com/images/manuals/GX25-35.pdf
The same place you put the oil in and drain it out.Turn up side down if you find oil port,may be a gas/oil mix ratio which in that case no oil change ever needed