new asp 40 glow engine
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Joined: Aug 2010
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From: calgary, AB, CANADA
I am only familiar with 2 stroke OS engine break in procedures. For ringed engines it is recommended the engine is started running rich in a 4 cycle mode so it is firing every other cycle, run this way for 3 or 4 minutes if it quits running when the glo heat is removed lean out slightly. Gradually close the high speed needle valve so that it just breaks into 2 cycle operation for 10 seconds or so then open up the needle valve so it is running rich again for 2 minutes or so, alternate between 2 cycle and 4cycle operation until the fuel tank is empty. After that it is recommended the plane be flown with a rich 2 cycle setting, Each successive flight the needle valve can be closed to lean out the engine a bit more. After 10 tanks have been run through the engine it can be leaned out to peak rpms and richen it up to drop the rpm 300 or so off peak.
Last edited by swify; 04-02-2015 at 12:53 PM.



