briangp

Have a K&B .61 that was given to me 10 years ago, new in box. Was going to use it in a plane but decided it was too small. It got a tank of gas on a 2x4 and went back into the box for another 9 years. I broke it out again here a couple weeks ago to install it on a Seagull Edge 540 swinging a 12x6 prop. Anyways, was given a fuel pump, didn't work, so we primed it and to much surprise, it fired right off on the first flip! Seemed to run great. We ran about a half tank through at half or lower throttle, high speed needle set two and a half turns out. Well reading into this a little more tonight, I think it should have been closer to 3 turns out, but I ran it more on deck the other day, and I think it was running too lean because it would choke out. Backed off the needle more and it would still run ridiculously hot, not exactly sure what is going on.

We ran it again tonight with the intention of richening and running it for a test flight since the plane was finished. Anyways, ran it for about a minute and got it to a point that it wouldn't bog out at high throttle then shut it down to lock the high speed needle and it didn't want to start afterwards and was really hot yet again. We're not using a starter and the guy I have helping me is not really the kinda guy that uses him, every one of his motors starts on the first flip, and this motor is usually no exception, except once it runs and gets hot, then it wont start anymore... easily at least.

My question to anyone is, has there been a general method for breaking in these engines that we should know, it still seems to be running very hot and I think I've burned up my glow plug now. Using a #6 plug and 15% fuel.