dkshema rrProfessor Location: Cedar Rapids, IA
| Only 9 gallons, it's still a baby.
Hone the cylinder? It appears to still have most of its original cross-hatching from the factory, I see no glaze on the cylinder walls. I see no reason to do much other than put it back together properly, retune the new carb, and go fly.
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But....
If you have the burning desire to hone the cylinder, use one of these -- available from most auto parts stores for something on the order of $15 or less.

And if you DO hone it, take it out of the crankcase first. Clean it well afterwards to remove any grit left behind. Reassemble using after-run oil, and go break it in all over again.
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Oh yeah, one more thing. Your motor's parts seem to be laying around on some nice carpet or fuzzy terry cloth. That's a great way to get all sorts of nasty debris -- fibers, dirt, grime, slime -- on the parts. Clean it well before reassembly to remove all the foreign material from the various parts.
Lightly tighten the six head bolts using a diagonal pattern as shown below:

After you've lightly tightened all six bolts, repeat the process a couple more times, torquing the bolts a bit tighter each time. The diagonal pattern distributes stress evenly around the cylinder and insures that the head is flat on top of the cylinder. Don't overdo the torque to the point where you strip threads or break bolts, but after two or three iterations, you'll have the head bolts good and snug and they won't come loose on you.
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* Making the World a Better Place -- One Helicopter at a time! *
Dave |