OS 91 FX Break In?
03-17-2006, 06:16 PM
#1
OS 91 FX Break In?
I just received my OS 91 Fx and would like to break it in right before I install in my Edge. This is the first ringed engine I've owned. I read the instructions and it said to run it 4 stroking for awhile then 2 stroking for awhile. back and forth. I thought I read on hear sometime ago that you break a ringed engine very rich at full throttle for a few tanks. I plan on using 10% with 20% castor/syn blend. I'd like to break this engine in right and would like it to last me awhile. I figured you guys could point me in the right direction. Thanks
03-17-2006, 08:20 PM
#2
Banned
RE: OS 91 FX Break In?
I would think that a company that has been making engines for 70 years and made your engine would know how to properly break it in. That's why they have instructions.
03-17-2006, 11:14 PM
#4
RE: OS 91 FX Break In?
ORIGINAL: Kaos Krazy
I read the instructions and it said to run it 4 stroking for awhile then 2 stroking
for awhile. back and forth. I thought I read on hear sometime ago that you
break a ringed engine very rich at full throttle for a few tanks.
I read the instructions and it said to run it 4 stroking for awhile then 2 stroking
for awhile. back and forth. I thought I read on hear sometime ago that you
break a ringed engine very rich at full throttle for a few tanks.
full peak, and then four stroke it for a few seconds to let it cool off. Don't run
it too rich, too long. The only time the engine is breaking in properly is when
it has almost maximum pressure on the ring.
Don't baby it too much....peak it up, and let it run full blast for about 20 seconds
at a time.
FBD.
03-18-2006, 01:36 AM
#5
RE: OS 91 FX Break In?
It was suggested to me once that I start a topic on running in ringed engines and I thought about calling it
The one and only way to run in a ringed engine and if you don't do it MY way you'll ruin it!
But, like an ABC, there's no "set in stone" way to do it. However, I'd definitely suggest that at least the first tank be done absolutely slobbering rich. That keeps everything (including the rings) nice and cool and helps flush out any crud that might be left by the machining. After that, take it up about to the point it's trying to break into a 2 stroke for another maybe 30 minutes. After that give it another tank or two at the same setting but pinch the line for a few seconds to let it rev up and get a bit of heat through things then cool again. Then go fly but keep it well on the rich side for some time. Never let it sag from overheating.
It's easy enough but takes more time than an ABC if you want to do it right. And I've even left out all the techno babble about heat treating, work hardening, softer and harder metals...
The one and only way to run in a ringed engine and if you don't do it MY way you'll ruin it!
But, like an ABC, there's no "set in stone" way to do it. However, I'd definitely suggest that at least the first tank be done absolutely slobbering rich. That keeps everything (including the rings) nice and cool and helps flush out any crud that might be left by the machining. After that, take it up about to the point it's trying to break into a 2 stroke for another maybe 30 minutes. After that give it another tank or two at the same setting but pinch the line for a few seconds to let it rev up and get a bit of heat through things then cool again. Then go fly but keep it well on the rich side for some time. Never let it sag from overheating.
It's easy enough but takes more time than an ABC if you want to do it right. And I've even left out all the techno babble about heat treating, work hardening, softer and harder metals...
03-18-2006, 11:08 AM
#6
RE: OS 91 FX Break In?
ORIGINAL: downunder
It was suggested to me once that I start a topic on running in ringed engines and I thought about calling it
The one and only way to run in a ringed engine and if you don't do it MY way you'll ruin it!
But, like an ABC, there's no "set in stone" way to do it. However, I'd definitely suggest that at least the first tank be done absolutely slobbering rich. That keeps everything (including the rings) nice and cool and helps flush out any crud that might be left by the machining. After that, take it up about to the point it's trying to break into a 2 stroke for another maybe 30 minutes. After that give it another tank or two at the same setting but pinch the line for a few seconds to let it rev up and get a bit of heat through things then cool again. Then go fly but keep it well on the rich side for some time. Never let it sag from overheating.
It's easy enough but takes more time than an ABC if you want to do it right. And I've even left out all the techno babble about heat treating, work hardening, softer and harder metals...
It was suggested to me once that I start a topic on running in ringed engines and I thought about calling it
The one and only way to run in a ringed engine and if you don't do it MY way you'll ruin it!
But, like an ABC, there's no "set in stone" way to do it. However, I'd definitely suggest that at least the first tank be done absolutely slobbering rich. That keeps everything (including the rings) nice and cool and helps flush out any crud that might be left by the machining. After that, take it up about to the point it's trying to break into a 2 stroke for another maybe 30 minutes. After that give it another tank or two at the same setting but pinch the line for a few seconds to let it rev up and get a bit of heat through things then cool again. Then go fly but keep it well on the rich side for some time. Never let it sag from overheating.
It's easy enough but takes more time than an ABC if you want to do it right. And I've even left out all the techno babble about heat treating, work hardening, softer and harder metals...
03-18-2006, 11:23 AM
#7
RE: OS 91 FX Break In?
Thanks for all you input. I'll break it in bascically the same way the instructions stated, only run it very rich the first tank, then start 2 strokin. But I was looking forward to hearing to all the techno babble about heat treating, work hardening, softer and harder metals... [sm=lol.gif]
[sm=lol.gif]
