Today's Message Index:
----------------------
1. 05:25 AM - Oil pressure "mushroom" (Catz631@aol.com)
2. 03:01 PM - Two Oil Change Questions (John Fasching)
3. 03:36 PM - Re: Two Oil Change Questions (Roger Lee)
4. 06:35 PM - Re: Re: Two Oil Change Questions (Hugh McKay)
5. 07:04 PM - Re: Re: Two Oil Change Questions (Kevin Klinefelter)
6. 08:58 PM - Oil leak at Oil Pump 912UL (moosepileit)
7. 08:59 PM - Re: Two Oil Change Questions (Roger Lee)
8. 09:10 PM - Re: Oil leak at Oil Pump 912UL (Roger Lee)
Message 1
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| Subject: | Oil pressure "mushroom" |
Just received my new oil pressure "mushroom",spring and cap to replace the
old "ball". Also included in the package was a piece of swarf from the
drilling process. The mushroom has a hole drilled down the center and I think
that's where it came from. I will blow off all the parts with air and check
with a light. That piece of metal would have not make a welcome addition in
this area.
Dick Maddux
912
Milton,Fl
Message 2
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| Subject: | Two Oil Change Questions |
1. I don't see any reference to the TIME between oil changes, just
engine hours. I always thought that acid/other bad stuff builds up in
the oil and even without, say 25 or 50 hours on the engine that the oil
perhaps should be changed if its been some time since the last change.
Your thoughts?
2. Do those of you that have an oil radiator or oil cooler that could
retrain oil when the oil tank is emptied also disconnect the
radiator/cooler and drain that residual oil, or just leave it there
believing its only a small amount?
Message 3
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| Subject: | Re: Two Oil Change Questions |
Hi John,
First two trains of thought. The Rotax maint. manual says 100 hr. oil changes and
it has pretty much always been that way in the last several years. In the classes
they will tell you 50 hrs. with 91 Oct. and 25 hrs. with 100LL. Don't use
a straight dino oil always use a semi synthetic or full synthetic. Full synthetic
is only ok with 91 Oct. and semi synthetic with either 91 oct. or 100LL.
Never use a full synthetic with 100LL. Always use a motorcycle oil and not a
car oil. Car oil does not have the gear additives our engine's & gearbox's need.
I change my oil at 50 hrs. and always have and I use 91 Oct. except for the occasional
trip use of 100LL.
This can be a hotly debated issue on oil change due to down time intervals, so
I'm sure you may hear some other opinions here and they may be right up to a point.
Oil can become more acidic over time. The dino based oils are far worse than the
synthetics. If you fly this winter once every two weeks then I would personally
change my oil at least every 120 days. I wouldn't let the oil sit all winter
without a start up at least once a month to operating temps. Do people leave
oil in all winter, do they run 100 - 200 hrs between oil changes?
Yes, but remember the worst thing that ever happens to a Rotax isssssssss, it's
owner.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=319356#319356
Message 4
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| Subject: | Re: Two Oil Change Questions |
Roger,
In a number of your emails on the subject of either engine oil or fuel for
the 912 UL or 912 ULS you state that you only use 91 oct. fuel. I have a
912 UL and I use 93 oct. fuel because I can get it with out ethanol. Here
where I live the 89 and 91 both have ethanol. The 89 is 10% ethanol, and
the 91 is a blend of 89 (with the ethanol) and 93 (without ethanol) which
means the 91 still has ethanol but is lower than 10%. I was wondering why
you refer to the 91 oct. all the time and not 93 oct.?
Hugh McKay
-----Original Message-----
From: Roger Lee
Sent: Sunday, November 14, 2010 6:33 PM
Subject: RotaxEngines-List: Re: Two Oil Change Questions
Hi John,
First two trains of thought. The Rotax maint. manual says 100 hr. oil
changes and it has pretty much always been that way in the last several
years. In the classes they will tell you 50 hrs. with 91 Oct. and 25 hrs.
with 100LL. Don't use a straight dino oil always use a semi synthetic or
full synthetic. Full synthetic is only ok with 91 Oct. and semi synthetic
with either 91 oct. or 100LL. Never use a full synthetic with 100LL. Always
use a motorcycle oil and not a car oil. Car oil does not have the gear
additives our engine's & gearbox's need.
I change my oil at 50 hrs. and always have and I use 91 Oct. except for the
occasional trip use of 100LL.
This can be a hotly debated issue on oil change due to down time intervals,
so I'm sure you may hear some other opinions here and they may be right up
to a point.
Oil can become more acidic over time. The dino based oils are far worse than
the synthetics. If you fly this winter once every two weeks then I would
personally change my oil at least every 120 days. I wouldn't let the oil sit
all winter without a start up at least once a month to operating temps. Do
people leave oil in all winter, do they run 100 - 200 hrs between oil
changes?
Yes, but remember the worst thing that ever happens to a Rotax isssssssss,
it's owner.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=319356#319356
Message 5
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| Subject: | Re: Two Oil Change Questions |
In CA premium auto gas is 91 octane and I have tested some here for alcohol
at 5-6%. I don't think 93 is available here. While traveling around this
great country ( and Canada on the way to AK) I have found some 91 and some
93; not sure why...
Kevin, 914 Europa
----- Original Message -----
From: "Hugh McKay" <hgmckay@bellsouth.net>
Sent: Sunday, November 14, 2010 6:26 PM
Subject: Re: RotaxEngines-List: Re: Two Oil Change Questions
> <hgmckay@bellsouth.net>
>
> Roger,
> In a number of your emails on the subject of either engine oil or fuel for
> the 912 UL or 912 ULS you state that you only use 91 oct. fuel. I have a
> 912 UL and I use 93 oct. fuel because I can get it with out ethanol. Here
> where I live the 89 and 91 both have ethanol. The 89 is 10% ethanol, and
> the 91 is a blend of 89 (with the ethanol) and 93 (without ethanol) which
> means the 91 still has ethanol but is lower than 10%. I was wondering why
> you refer to the 91 oct. all the time and not 93 oct.?
>
> Hugh McKay
>
> -----Original Message-----
> From: Roger Lee
> Sent: Sunday, November 14, 2010 6:33 PM
> To: rotaxengines-list@matronics.com
> Subject: RotaxEngines-List: Re: Two Oil Change Questions
>
>
> Hi John,
>
> First two trains of thought. The Rotax maint. manual says 100 hr. oil
> changes and it has pretty much always been that way in the last several
> years. In the classes they will tell you 50 hrs. with 91 Oct. and 25 hrs.
> with 100LL. Don't use a straight dino oil always use a semi synthetic or
> full synthetic. Full synthetic is only ok with 91 Oct. and semi synthetic
> with either 91 oct. or 100LL. Never use a full synthetic with 100LL.
> Always use a motorcycle oil and not a car oil. Car oil does not have the
> gear additives our engine's & gearbox's need.
> I change my oil at 50 hrs. and always have and I use 91 Oct. except for
> the occasional trip use of 100LL.
>
> This can be a hotly debated issue on oil change due to down time
> intervals, so I'm sure you may hear some other opinions here and they may
> be right up to a point.
> Oil can become more acidic over time. The dino based oils are far worse
> than the synthetics. If you fly this winter once every two weeks then I
> would personally change my oil at least every 120 days. I wouldn't let the
> oil sit all winter without a start up at least once a month to operating
> temps. Do people leave oil in all winter, do they run 100 - 200 hrs
> between oil changes?
>
> Yes, but remember the worst thing that ever happens to a Rotax isssssssss,
> it's owner.
>
> --------
> Roger Lee
> Tucson, Az.
> Light Sport Repairman - Maintenance Rated
> Rotax Repair Center
> Home 520-574-1080 TRY HOME FIRST
> Cell 520349-7056
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=319356#319356
>
>
>
Message 6
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| Subject: | Oil leak at Oil Pump 912UL |
Hello,
Have a 912 UL w/ a seep at the Lower right oil pump cover corner, seen when facing
the pump. 740 hour engine, owner previous changed the O-Rings 57-3 from the
Oil Pump and Filter drawing 200 hours and 3 years ago, I think it has been a
constant issue.
Suggestions? Checked the basics, ie, cleaned, ran up, confirmed source is actually
that corner not some wind-blown other source.
Seeps enough to just see it static, and makes a bit of a mess running- just about
1 oz per hour of loss- the mess matches that amount.
Thanks!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=319375#319375
Message 7
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| Subject: | Re: Two Oil Change Questions |
I only say 91 Oct. because that is all we have here in Tucson. We don't have 92
or 93 here. We have ethanol and have had for years. I have used ethanol fuel
for all these years in my Rotax engines and have never had an issue. Even though
our pumps like many others say up to 10% usually if you test it is is 6%-8%.
The other reason I say 91 Oct. is because that is the lowest grade to use in the
912ULS. It is so no one ever goes lower in their thinking on the right Octane
and higher higher of course is just as good or better.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=319376#319376
Message 8
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| Subject: | Re: Oil leak at Oil Pump 912UL |
Howdy Moose, (couldn't resist)
If your sure it is coming from that "O" ring area. I would replace both "O" rings.
Part #430405 57X3 and or 430175 46X3 and use a little Loctite 5910 sealer
on them or which ever one you replace. Make sure the mating surface area around
the "O" ring is good and clean. The 5910 should take care of your problem.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=319378#319378
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