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01-10-2013 12:42 AM  7 years ago
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bricktop

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fuel/engine question
on average/moderate flying conditions (not really hardcore thrashing 3-d). my 90 has an os91 max sx engine, so, how many gallons would you put through it before you rebuild it? or, what should i look for other than opening it up and feeling the bearings and looking at the piston to determine it's time for a rebuild. turning the engine over by hand it doesn't feel stiff or gritty, and it's probably had about 10-15 gallons ran through it.
I didn't say you did it...I said I was blaming you.
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01-10-2013 12:46 AM  7 years ago
McKrackin

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Lucasville,Ohio

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Pull the pipe off about every ten gallons and look at the ring...if it's still black,you're golden.

But truly...if it runs good....don't give it a thought.
If you have to mess with needles...check it out.
I literally never use the word literally right.
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01-10-2013 12:53 AM  7 years ago
bricktop

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it stays tuned whenever i get it set to the right temperature, i don't have to mess with it until the next drastic weather change.I didn't say you did it...I said I was blaming you.
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01-10-2013 12:55 AM  7 years ago
McKrackin

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Lucasville,Ohio

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You're good.
If it's making power and making it consistently....there's nothing to even think about.
I literally never use the word literally right.
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01-10-2013 12:58 AM  7 years ago
McKrackin

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Just in case you're wondering....I have heard of well taken care of nitros running great after more cases of fuel than you've run gallonsI literally never use the word literally right.
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01-10-2013 01:05 AM  7 years ago
bricktop

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lol.....awesome!!! i won't worry about it for now then. i was just curious. i just rebuilt an os91 hz and was thinking about my other engine but it sounds like there's nothin to worry about. thanks guysI didn't say you did it...I said I was blaming you.
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01-11-2013 07:59 PM  7 years ago
MartyH

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USA

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Sounds like you're good. When you get to the point that it's obviously making no power but won't take any needle, time to rebuild. 15% fuel will prolong engine life as well.
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