What kind of fuel can I run in an OS 91 df? Can I run 15% heli mix?

I never ran more than 7%

you can but, i would'nt advise it. you will burn it up rather quickly. you need to run the lowest nitro that you can get with the highest oil content. i run 5%nitro with 20% oil. i have buddys that special order there fuel with 0% nitro and 23% oil. i run my motors a little rich also. are you running this motor in a heli?? if you are you will want the byron head on also. you will need the large head to help cool the motor.... good luck donniercjet

I always ran my OS91's on 10% nitro. 15% is a bit high. If you already have the fuel and want to try it I'd recommend adding another head shim.

What % oil is in the heli mix? You need at least 20%, and it should be a synthetic/castor blend.

Your best bet is to order some Wildcat Jet-A DF fuel in either 5 or 10% nitro. It has about 23% oil.

Joe

"Your best bet is to order some Wildcat Jet-A DF fuel in either 5 or 10% nitro. It has about 23% oil"

What he said.

Thanks for the help. I think i will order the fuel. I do not want to burn it up just yet.

Hi

Order the Wildcat DF 5%. In my experience it runs better than 10%. Mine has about 30 flights, and I'm on the second glow plug and no dead sticks yet (knock on wood) .

Regards
Eduardo

chipperg check your PM's