RCU Forums - Is this ok?

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I plan to start my engine today for justa min or two. The only thing is i only have truck fuel left and havent been able to run to the hobby shop for plane fuel. It is 25% NITRO 12% lube. WIll this kill my brand new motor. I wouldnt think so but I figured id better check

YES IT WILL HURT IT BAD!!!!!!!!!!!!!. THAT MUCH NITRO AND WAY LESS OIL THAN IT NEEDS LIKE 18 TO 20% OIL. DON'T USE THAT FUEL.

New aircraft small glow engines should be broken in (first runs) with about a 10% nitro fuel, containing at least 18% to 20% of lube. Some of the oil should be castor to help cool the motor. Depending on the type of Engine, there are two ways of breaking it in;

A non ringed ABC type motor should be kept warm, but not hot, by running it at a slightly rich 2 cycle. No peak rpm running for at least 1 1/2 tanks. Cycle the rpm up and down and let it cool of between tanks. When it will hold a steady and reliable idle and advance rpm smoothly it is usually considered broken in.

A ringed engine needs to be kept cool during the break in to permit the piston and ring to seat properly. Run this type engine very rich, in a blubbering 4 cycle mode, preventing it from getting hot. The head should be cool to the touch while it is running. Run it for about 5 to 7 minutes at a time, letting it cool for about 1/2 hour between runs. Many ringed engines require a gallon or more of fuel run through them before they are completely broken in.

As stated, wait and do it right. You wil burn it up, even if you run it really rich. If you get in a hurry and try it, you could damage it. Why run it just for a minute if you can't fly it anyway. Get the right fuel and then do it right. Patients will do a lot for you in this one.

need a little more oil,in other words, NO! Wait till you get the correct fuel,unless you just want to see how tough the engine really is.:D

I agree, don't do it.

There's a guy in my club who runs very car-like fuel in his engines, but it's not what he uses when he breaks them in. This guy is good with engines, most people would make a paperweight if they ran the same fuel he does.

I too agree, don't need many more people to agree now[sm=lol.gif] do it right!

"I am dangerous....Ice.....Man"
:)

The oil content is too low. You should not run it.

So, did you start it?
Dennis-

I agree with the above. Use the 25% for starting the bbq grill. JUST KIDDING. Your manual should state what is the best fuel to use. My own preference is 10%nitro with 18% Synthetic/Castor Blend (80/20) and to that I add 4ounces of castor just to bring the oil content up. But that's just my preference, the additional castor.

as everyone one else said...NO NO NO NO NO NO!!!!! Dont put that fuel near that poor engine!! Not uinless you can buy a new engine.

sean