stunthanger.com
Engine basics => Engine set up tips => Topic started by: Jim Roselle on April 02, 2014, 09:32:01 AM
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Hey all,
I plan on running my LA 46 for the first time tomorrow. The instructions say open the needle 1 1/2 turns. That does not sound correct to me. Comments?
Thank you,
Jim
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I assume that is simply for starting the engine. What you do after that depends on what you are doing. If running in adjust the needle valve to a leanish setting, as you want the piston / liner to get up to temperature quickly, don't run it rich as you would for an old style engine, otherwise you will have a very tight engine and you will be putting undue strain on it. A lot of people just put it in a plane and go fly. The only drawback is that the engine will run in quickly and hence needle settings will vary (or your rpm if you don't touch the needle between flights). It should settle down after 10 or 15 flights. you will know when you have it run in, because the fuel consumption drops significantly at that stage,
Regards,
Andrew.
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also for break in, use a smaller prop,,, something like an 9x4
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Hey all,
I plan on running my LA 46 for the first time tomorrow. The instructions say open the needle 1 1/2 turns. That does not sound correct to me. Comments?
Thank you,
Jim
I have no reason to think it's not correct, or in any way fatal. I found the preset needle on my 25LAs to be right on the money, so I wouldn't dismiss their advice. Of course, if it doesn't start, then no reason to keep it either.
Brett
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If you have trouble getting the engine to start and continue running, it's probably due to fuel draining out of the feed line between NV and venturi. I came to dislike the rear NV setup on my .25LA. I've never tried the stock NV setup on a .46LA, because I changed it immediately to a front NV. Some are ok with the rear NV, and some don't like them at all. Feel free to use it or change it, as you see fit. H^^ Steve