how to break in a 2c engine???
02-08-2008 | 12:51 AM
#3
RE: how to break in a 2c engine???
There are a lot of arguments about this but this is what I've found to be best. First, use the smallest recommended prop. This takes a lot of load off the engine but because it'll be run fairly rich the revs aren't excessive. Second, use a fuel with plenty of oil and at least some of it castor, especially if it's a plain bearing engine like an LA. I use 25% all castor but that's just my preference.
For an ABx type engine the initial mixture setting at full throttle should be at around the point where it's just breaking out of a 4 stroke into a 2 stroke. I like to have the first 5 minutes or so rich enough to be mainly 4 stroking and then after that lean it a fraction at a time every 5 minutes to slowly build up more heat. It should be flyable after 30-40 minutes but keep it on the rich side for a while.
For an ABx type engine the initial mixture setting at full throttle should be at around the point where it's just breaking out of a 4 stroke into a 2 stroke. I like to have the first 5 minutes or so rich enough to be mainly 4 stroking and then after that lean it a fraction at a time every 5 minutes to slowly build up more heat. It should be flyable after 30-40 minutes but keep it on the rich side for a while.
02-08-2008 | 01:17 AM
#5
RE: how to break in a 2c engine???
What if yukonpete doesn't know what "just breaking out of a 4 stroke into a 2 stroke" means? What if yukonpete has a ringed engine? What if yukonpete is trying to break in his new O.S. 2-stroke with 30% helicopter fuel and an A3 plug? Are the instructions for breaking in a .15 LA the same for breaking in a 1.40RX?
I apologize because I know the above paragraph may sound antagonistic; but the simple truth is that the best way to break in your particular engine is to follow the break-in instructions in your owner's manual. If you don't have your owner's manual, you're in luck:
http://www.osengines.com/manuals/index.html
Breaking in a plain bearing engine with an air bleed carburator can be different than breaking in a ball-bearing engine with a twin needle carburator. Breaking in a ringed engine can be different from breaking in a ringless ABC or ABN design. Breaking in a small engine can be different from breaking in a very large engine (.25 FX versus 1.60 FX, e.g.). The original poster, yukonpete, didn't even specify if he was breaking in a control line or R/C engine.
If you read the owner's manual and follow the manufacturer's recommendations for breaking in your model of engine, you won't ever be disappointed.
I apologize because I know the above paragraph may sound antagonistic; but the simple truth is that the best way to break in your particular engine is to follow the break-in instructions in your owner's manual. If you don't have your owner's manual, you're in luck:
http://www.osengines.com/manuals/index.html
Breaking in a plain bearing engine with an air bleed carburator can be different than breaking in a ball-bearing engine with a twin needle carburator. Breaking in a ringed engine can be different from breaking in a ringless ABC or ABN design. Breaking in a small engine can be different from breaking in a very large engine (.25 FX versus 1.60 FX, e.g.). The original poster, yukonpete, didn't even specify if he was breaking in a control line or R/C engine.
If you read the owner's manual and follow the manufacturer's recommendations for breaking in your model of engine, you won't ever be disappointed.
02-08-2008 | 02:01 AM
#6
RE: how to break in a 2c engine???
ORIGINAL: bigedmustafa
What if yukonpete doesn't know what "just breaking out of a 4 stroke into a 2 stroke" means? What if yukonpete has a ringed engine? What if yukonpete is trying to break in his new O.S. 2-stroke with 30% helicopter fuel and an A3 plug? Are the instructions for breaking in a .15 LA the same for breaking in a 1.40RX?
I apologize because I know the above paragraph may sound antagonistic; but the simple truth is that the best way to break in your particular engine is to follow the break-in instructions in your owner's manual. If you don't have your owner's manual, you're in luck:
http://www.osengines.com/manuals/index.html
Breaking in a plain bearing engine with an air bleed carburator can be different than breaking in a ball-bearing engine with a twin needle carburator. Breaking in a ringed engine can be different from breaking in a ringless ABC or ABN design. Breaking in a small engine can be different from breaking in a very large engine (.25 FX versus 1.60 FX, e.g.). The original poster, yukonpete, didn't even specify if he was breaking in a control line or R/C engine.
If you read the owner's manual and follow the manufacturer's recommendations for breaking in your model of engine, you won't ever be disappointed.
What if yukonpete doesn't know what "just breaking out of a 4 stroke into a 2 stroke" means? What if yukonpete has a ringed engine? What if yukonpete is trying to break in his new O.S. 2-stroke with 30% helicopter fuel and an A3 plug? Are the instructions for breaking in a .15 LA the same for breaking in a 1.40RX?
I apologize because I know the above paragraph may sound antagonistic; but the simple truth is that the best way to break in your particular engine is to follow the break-in instructions in your owner's manual. If you don't have your owner's manual, you're in luck:
http://www.osengines.com/manuals/index.html
Breaking in a plain bearing engine with an air bleed carburator can be different than breaking in a ball-bearing engine with a twin needle carburator. Breaking in a ringed engine can be different from breaking in a ringless ABC or ABN design. Breaking in a small engine can be different from breaking in a very large engine (.25 FX versus 1.60 FX, e.g.). The original poster, yukonpete, didn't even specify if he was breaking in a control line or R/C engine.
If you read the owner's manual and follow the manufacturer's recommendations for breaking in your model of engine, you won't ever be disappointed.
True? Yes
EDIT// I just compaired the 25fx and the 1.60fx and they have pretty much identical break in procedures just different initial needle settings for first start.
02-08-2008 | 06:24 AM
#8
My Feedback: (1)
RE: how to break in a 2c engine???
ORIGINAL: bigedmustafa
If you read the owner's manual and follow the manufacturer's recommendations for breaking in your model of engine, you won't ever be disappointed.
If you read the owner's manual and follow the manufacturer's recommendations for breaking in your model of engine, you won't ever be disappointed.
CGr.
