Today's Message Index:
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1. 12:35 AM - Re - fuel in oil Rotax 912ULS (Peter Thomson)
2. 07:05 AM - Re: Re - fuel in oil Rotax 912ULS (Roger Lee)
3. 08:09 AM - Re: Re - fuel in oil Rotax 912ULS (lucien)
4. 03:51 PM - Re: Re: Re - fuel in oil Rotax 912ULS (steve feigley)
Message 1
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| Subject: | Re - fuel in oil Rotax 912ULS |
thanks to all who posted on this.
The oil lab says 4 of more than 100 912 engines showed more than 2pct fuel
in oil, and, as an aside, that they notice marine engines have higher levels
of fuel, likely due lower running temps.
As this is a low time (380hr) engine which runs cold (70C), I suspect it is
likely Kev's suggestion, rather than Ivor's weeping diaphragm (hope not!).
I've ordered a Thermostasis oil thermostat to increase oil temp. Tape over
the oil cooler is easier, but maybe I will find a time when I need it to
work 100pct. I fly in ambient ground temps of 30C+ most of the year.
I agree with you Roger on the carb balance, compression testing and have
these done,
On interesting point is that there has never been any moisture contamination
show in the oil. Water is why Rotax recommend running oil temps over 100C
each day of use.
again, thanks for all your comments !
Peter
Zenair CH701SP (CZAW)
Rotax 912ULS 380hr
Message 2
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| Subject: | Re: Re - fuel in oil Rotax 912ULS |
Hi Peter,
Just a thought.
With a thermostat you will only pick up another 22F. From 158F to 180F. This won't
be enough. The thermostat will be wide open at that point and it will not
get you up to 212-220F. I know many people with water and oil thermostats and
they don't think they work very well. I don't have either and when setting side
by side warming up with them my temps come up just as fast as theirs partly
because we are talking about a very small fluid area. The tape can bring you up
to a temp range more to your liking. One 2" wide strip across the top of the
radiator. My radiator is sandwiched together while others are two separate radiators
(oil, coolant).
While waiting for the radiator to come in why don't you take a flight or two with
the tape so you'll have something to compare before you add the thermostat.
Let us know how it works out.
Just a thought.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Service Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=252776#252776
Message 3
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| Subject: | Re: Re - fuel in oil Rotax 912ULS |
Roger Lee wrote:
> Hi Peter,
>
> Just a thought.
>
> With a thermostat you will only pick up another 22F. From 158F to 180F. This
won't be enough. The thermostat will be wide open at that point and it will not
get you up to 212-220F. I know many people with water and oil thermostats and
they don't think they work very well. I don't have either and when setting side
by side warming up with them my temps come up just as fast as theirs partly
because we are talking about a very small fluid area. The tape can bring you
up to a temp range more to your liking. One 2" wide strip across the top of the
radiator. My radiator is sandwiched together while others are two separate
radiators (oil, coolant).
> While waiting for the radiator to come in why don't you take a flight or two
with the tape so you'll have something to compare before you add the thermostat.
>
> Let us know how it works out.
>
> Just a thought.
I have the oil thermostat in my oil system (912ULS) and find that it's a big help.
The only time it doesn't help is in very cold weather (i.e. 20F or below)
where I've had the oil temp unable to get even to 180, basically no oil cooling
at all and it's still running cold.
At that point, I have to add tape to the coolant radiator as well to try to get
the thing to heat up. If I can't get the oil temp to 180 that way I just land
;).
I highly recommend the thermostat as it does allow your oil temps to get warm in
all but the coldest situations.....
LS
--------
LS
Titan II SS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=252791#252791
Message 4
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| Subject: | Re: Re - fuel in oil Rotax 912ULS |
From; Steve Feigley
I think some of you are too concerned with the oil temps indicated at your
gauge. The oil is subjected to the engine temps ie; cylinder temp as it pas
ses through them, these temps are high enough to evap. any h2o or residule
fuel . If your gauge is indicating temps after passing through the cooler a
lower temp is perfectly acceptable.
--- On Mon, 7/13/09, Roger Lee <ssadiver1@yahoo.com> wrote:
From: Roger Lee <ssadiver1@yahoo.com>
Subject: RotaxEngines-List: Re: Re - fuel in oil Rotax 912ULS
Hi Peter,
Just a thought.
With a thermostat you will only pick up another 22F. From 158F to 180F. Thi
s won't be enough. The thermostat will be wide open at that point and it wi
ll not get you up to 212-220F. I know many people with water and oil thermo
stats and they don't think they work very well. I don't have either and whe
n setting side by side warming up with them my temps come up just as fast a
s theirs partly because we are talking about a very small fluid area. The t
ape can bring you up to a temp range more to your liking. One 2" wide strip
across the top of the radiator. My radiator is sandwiched together while o
thers are two separate radiators (oil, coolant).
While waiting for the radiator to come in why don't you take a flight or tw
o with the tape so you'll have something to compare before you add the ther
mostat.
Let us know how it works out.
Just a thought.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Service Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=252776#252776
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