Europa-List Digest Archive

Sat 08/17/24


Total Messages Posted: 1



Today's Message Index:
----------------------
 
     1. 02:30 AM - Re: Rotax 912ULS oil consumption (Area-51)
 
 
 


Message 1


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    Time: 02:30:08 AM PST US
    Subject: Re: Rotax 912ULS oil consumption
    From: "Area-51" <goldsteinindustrial@gmail.com>
    181 has a 912UL with 1500hrs on it; top end overhauled 160hrs ago. It consistently uses 100ml every 5hrs, and I am not concerned about the consumption at all using Shell Sport+. Some on other Rotax forums have mentioned using AGIP and other high performance motor cycle oils with better results, i.e reduction in oil consumption. However its unknown if these oils are formulated to retain their performance above 4500' altitudes. If a 912UL/S is not burning oil then it is possible the fuel pump membrane is leaking fuel into the lubrication system. The result is thinning engine oil snd diminishing of lubrication performance. There was an AD on this issue. On the preflight rollover burping an engine that takes longer to burp than another would indicate better sealing of the compression rings. A fast burp is not a good thing, it could be a symptom of worn compression rings. So rolling the prop over slower will burp the engine faster than rolling it over in a hurry. Always check for oil leaks at the common spots and fix them if possible; crankcase parting line, valve pushrod tubes, valve rocker covers, oil return banjo at crankcase, oil pump case cover. Hope this info helps. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=513791#513791




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