Today's Message Index:
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1. 10:48 AM - Re: Re: Oil Pressure Oddity (Carl)
2. 04:33 PM - Re: Oil Pressure Oddity (JohnF)
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| Subject: | Re: Oil Pressure Oddity |
Hi John,
Good idea to read the tech manual, I did all of those thing that Mr Lee
recommends and more; found nothing cured the problem. The Rotax people in
Vernon said they knew of three other engines with the same problem and
changing the pump was the cure. After two weeks of changing parts: oil lines
,oil, oil filter, check valve and measuring oil intake suction and outlet
pressures I finally exchanged the complete oil pump from a friend's engine
and found my engine worked just fine with his pump. That proved to me that
the problem was in the pump.
The Pump is a simple gear type; it either produces pressure or it does not
Mine produced good pressure for 10 minutes then in less than a minute
dropped by ~10 psi. I knew then it had to be the check valve.
My fix was 14 years ago and it was a combination of one or two .016/025 alum
shims, (I do not remember exactly). that solved the problem It has worked
like a charm.for a further 700 hrs My press after a total of 856 hrs is a
solid high 60 low 70 on start and settles to 50/52 after warm-up
I just remembered that my oil press gauge needle fluctuated slightly before
the fix; now it is steady This maybe a further symptom of this problem..I
recommend you try this fix before you start disassembling the rest of your
oil system.
----- Original Message -----
From: "JohnF" <n29cx@ridgeviewtel.us>
Sent: Wednesday, July 19, 2017 12:56 PM
Subject: RotaxEngines-List: Re: Oil Pressure Oddity
>
> Thanks again, carl. I found a rotax service bulletin with drawings and
> instructions for the shim and its location, etc. All pretty straight
> forward. Now to find the time to open the cowling and have at it. Thanks
> again.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=471167#471167
>
>
>
Message 2
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| Subject: | Re: Oil Pressure Oddity |
Thank you, Carl,
I have a bi-annual flight review scheduled for tomorrow and then after that I will,
over the next few days, pull the cowl and try the shims you suggest. I had
already de-oxed and re-tightened connections to the oil pressure sender and
nothing there helped...will let you and the other readers on this site, how the
shim change worked out.
Thanks again.
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=471258#471258
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