Re: Petter AC1WM - Any other owners? Tips and tricks?
The oil filter is behind a cap on the lower left of the engine looking at the front. It's a bare cartridge type inserted in a horizontal well in the crankcase. Check some of the on-line manuals, if they're still there. There's a horizontal bolt with 1/2" head in the center of the cap for removal. I can order filter cartridges from my local NAPA store. NAPA 1629, Wix 51629.