This is my first 4 stroke and i got this engine without an owners manual , could someone please guide me thru tuning this engine. i'm not sure which is the low speed adjustment screw, and will my 15% wildcat fuel work in this engine.

thanks for the help
jr

If you will send me your address, I will be happy to make a copy of my OS 70 instruction sheet and mail it to you.

Steve

15% Wildcat will be fine.

The Surpass I has the low speed needle in the center of the throttle arm.

The Surpass II has the H & L both on the same side. The HS is the one that is finger adjustable. The LS is the recessed one beside the HS that has a screw driver slot in it.

You can download all the O.S. manuals at this site (in Adobe/Acrobat)


http://www.osengines.com/manuals/index.html

Can someone please tell me what your HS needle setting is?  I know this will vary with temp and altitude.. I am just curious.  Mine seemed fine at 1 1/2 turns is this normal?  I am hooking up a VP-20 because I could not get the tank exactly where I wanted it.. so I am having issues

Thanks and Happy New Year

Nate

1 1/4 to 1 1/2 turns is normal

Thank you so much.. I was getting nervous

Happy New Year

Go Buckeyes!!!!

Nate

I have the manual here:

http://www.dieselrc.com/download.html