acdii

Iwas going through the manual and it says to use 10% Nitro for break in, but Ihave 15% that I have been using for my Kadet, so I have a gallon and a 1/4 of it. Does it really make a difference between 10 and 15%?

Broken Wings

My Feedback: (20)

You'll be fine.

acdii

It would stink to have to have 2 different setups. The OS runs great on 15%.

jimmyjames213

My Feedback: (2)

just run it on 15% or drop the os down to 10% doesnt really make a difference. you wont damage the engine wither way

beppeVRCS

According to my experience it does not... The only thing to remeber, thou, is that during the beak-in period you're supposed to run "RICH", which does not mean only SLOW (using the throttle), it means that you must have a lot of extra fuel (oil, in perticular) in your air/fuel mixture. So use the engine with throttle fully open and 1-2 turns extra in the main needle. Sometimes you might even need the glow driver still on... The objective is to use the extra fuel and extra oil to cooperate in removing the extra heat of the friction of the parts in a brand new engine. 15% nitro instead of 10% will just cause a little more heat, so a "RICH" setting is a must.
Ciao
Beppe

acdii

OK Thanks, Hopefully I can get the plane finished today and get the engine mounted so I can do some run ups.

jeffie8696

Iwould offer to help but you are about 80 miles away. This engine is a ringed one so you need to break it in with a very rich needle setting, blubbery rich is good, unlike a ABN/ABC type which needs to be up to operating temp to prevent damage.