I just recieved An FS-91 without a manual. There are two fuel fittings on this motor. anyone know what the one on the bottom of the motor is for? Thanks

You mean the nipple sticking staight down from the bottom of the case?? it's a crank case vent. Run a piece of tubing off of it out onto the plane somewhere that you don't mind a little oil. [8D]

Mike's right. That thing will ooze some black gunky stuff (Technical term). Just run a piece of tubing from it to outside the cowl (Or just leave it as is if you don't mind having black gunky stuff inside the cowl)

You can go to the OS website and download the manual.....


Sorry no link, but comes right up if you search.

Andy

Nice clean oil comes out of mine, what are you feeding yours?