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914 OIL PRESSURE

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SPurpura(at)aol.com
Guest

Posted: Sun Oct 08, 2006 2:40 pm Post subject: 914 OIL PRESSURE

Any rotax drivers out there ever experience high oil pressures in cruise flght?Today my oil pressure was in the 97-99 psi. range,changing power/prop setting had no effect,engine ran fine & all temps normal.  

  [quote][b]

Gilles.Thesee(at)ac-greno
Guest

Posted: Sun Oct 08, 2006 2:50 pm Post subject: 914 OIL PRESSURE

 	  Quote: 	
		   Any rotax drivers out there ever experience high oil pressures in 

 cruise flght?Today my oil pressure was in the 97-99 psi. 

 range,changing power/prop setting had no effect,engine ran fine & all 

 temps normal.  


	


I'd check the sender (gauge, wiring...). They are subject to much 

vibration and radiated heat. We changed ours twice, and are considering 

installing it remote.



Regards,

Gilles Thesee

Grenoble, France

http://contrails.free.fr

grahamsingleton(at)btinte
Guest

Posted: Sun Oct 08, 2006 4:21 pm Post subject: 914 OIL PRESSURE

Gilles

standard practice with Lycosaurus is to install the sender remote for 

that reason. Can't see why Rotax don;t specify remote, what do they do 

on certified 91x installations?

Graham

Gilles Thesee wrote:

 	  Quote: 	

 <Gilles.Thesee(at)ac-grenoble.fr>

> Any rotax drivers out there ever experience high oil pressures in 

> cruise flght?Today my oil pressure was in the 97-99 psi. 

> range,changing power/prop setting had no effect,engine ran fine & all 

> temps normal.  

 I'd check the sender (gauge, wiring...). They are subject to much 

 vibration and radiated heat. We changed ours twice, and are 

 considering installing it remote.

 Gilles Thesee

Gilles.Thesee(at)ac-greno
Guest

Posted: Mon Oct 09, 2006 2:37 am Post subject: 914 OIL PRESSURE

Graham

 	  Quote: 	
		  

 standard practice with Lycosaurus is to install the sender remote for 

 that reason. 


	


Yes



 	  Quote: 	
		   Can't see why Rotax don;t specify remote, what do they do on certified 

 91x installations?


	


I must say that the low cost VDO sender seems far more reliable than the 

two units we got from UMA. The UMA failed, and we had to resort to a VDO 

sender+gauge as a temporary fix.



Regards,

Gilles Thesee

Grenoble, France

http://contrails.free.fr

rparigor(at)suffolk.lib.n
Guest

Posted: Mon Oct 09, 2006 9:10 am Post subject: 914 OIL PRESSURE

Hello Gilles



"The UMA failed, and we had to resort to a VDO sender+gauge as a temporary

fix."



What is exact wrong with using the VDO as a permanent fix??



Ron Parigoris

davidjoyce(at)doctors.org
Guest

Posted: Mon Oct 09, 2006 9:23 am Post subject: 914 OIL PRESSURE

Have twice experienced this sort of problem. The first time showed pressures

in excess of 6 bar , which is the Flydat alarm level. It turned out that one

wire had come loose at the sender, and fixing it gave normal pressures

again. Two years later I had an episode of pressures creeping up again and

cleaning the terminals on the sender sorted it. Regards, David Joyce G-XSDJ

---

Gilles.Thesee(at)ac-greno
Guest

Posted: Mon Oct 09, 2006 10:30 am Post subject: 914 OIL PRESSURE

Hi Ron,



 	  Quote: 	
		  

 "The UMA failed, and we had to resort to a VDO sender+gauge as a temporary

 fix."



 What is exact wrong with using the VDO as a permanent fix??



   

The VDO sender is not compatible with our 270°, red and green-arc UMA 
	


gauge http://contrails.free.fr/images/DSCF1622.JPG

Using the VDO sender, we must use the 90° swing, smaller diameter, 

black-rim VDO gauge. In our area, those gauges are used on mopeds and 

lawn-tractors....

You can see the temporary gauge on the frontispice at  

http://contrails.free.fr/instruments_tableau_phif.php

Best regards,

Gilles

http://contrails.free.fr

kpaviat(at)verizon.net
Guest

Posted: Mon Oct 09, 2006 2:52 pm Post subject: 914 OIL PRESSURE

Hi Sam! This is  typical problem when the sender fails. I like the idea about mounting the sender remotely to avoid the high frequency vibrations where the sender is on the engine. The newer senders have the heavy bronze ring to damp this problem but it is usually only a matter of time before failure. Good Luck!

 kp      [quote][b]

grahamsingleton(at)btinte
Guest

Posted: Mon Oct 09, 2006 3:50 pm Post subject: 914 OIL PRESSURE

Listen to this guy, He has a lot of experience, 2 generations of it in fact!

Graham



Kim Prout wrote:



 	  Quote: 	
		   Hi Sam! This is  typical problem when the sender fails. I like the 

 idea about mounting the sender remotely to avoid the high frequency 

 vibrations where the sender is on the engine. The newer senders have 

 the heavy bronze ring to damp this problem but it is usually only a 

 matter of time before failure. Good Luck!

 kp



*

*

jodel(at)nildram.co.uk
Guest

Posted: Tue Oct 10, 2006 6:51 am Post subject: 914 OIL PRESSURE

 	  Quote: 	
		  Can't see why Rotax don;t specify remote, what do they do 

on certified 91x installations?


	


I looked at a CofA Tecnam in our hangar today.  The sender is mounted direct

to the engine as normal.



Simon

peterz(at)zutrasoft.com
Guest

Posted: Tue Oct 10, 2006 7:48 am Post subject: 914 OIL PRESSURE

... and was also a common problem (symptom = false high oil pressure) on the cert'd Kanata I trained on.



	--

rparigor(at)suffolk.lib.n
Guest

Posted: Tue Oct 10, 2006 8:35 am Post subject: 914 OIL PRESSURE

For what it's worth, I talked to Ed from UMA, and they use VDO senders for

most of their oil pressure instruments (except perhaps the electronic),

the part number would include a "V" in it.



Anyway he said they are troublesome if mounted on the motor. He recommends

remote mounting, and using a .015" or .010" restrictor close to the

engine.



He likes .010" but OP will take a while to build upon first start up.



Ron Parigoris

grahamsingleton(at)btinte
Guest

Posted: Tue Oct 10, 2006 10:18 am Post subject: 914 OIL PRESSURE

Ron

that approach sounds sensible to me

Graham



rparigor(at)suffolk.lib.ny.us wrote:



 	  Quote: 	
		  



For what it's worth, I talked to Ed from UMA, and they use VDO senders for

most of their oil pressure instruments (except perhaps the electronic),

the part number would include a "V" in it.



Anyway he said they are troublesome if mounted on the motor. He recommends

remote mounting, and using a .015" or .010" restrictor close to the

engine.



He likes .010" but OP will take a while to build upon first start up.



Ron Parigoris

SPurpura(at)aol.com
Guest

Posted: Tue Oct 10, 2006 3:26 pm Post subject: 914 OIL PRESSURE

I found the Rotax replacement part priced at $220.00 a bit ridiculus for an automotive sensor.NAPA auto parts catalog has a oil pressure sending unit for marine applications,several similar to choose from,(single wire,120psi & 1/8" pipe threads) for $18.00,so I ordered 1.

 I'll post how it came out.

  [quote][b]

grahamsingleton(at)btinte
Guest

Posted: Tue Oct 10, 2006 4:18 pm Post subject: 914 OIL PRESSURE

Have a good search round for the right fittings to connect it. It should 

be easy but they do tend to put obstacles in your way!

Graham



SPurpura(at)aol.com wrote:



 	  Quote: 	
		   I found the Rotax replacement part priced at $220.00 a bit ridiculus 

 for an automotive sensor.NAPA auto parts catalog has a oil pressure 

 sending unit for marine applications,several similar to choose 

 from,(single wire,120psi & 1/8" pipe threads) for $18.00,so I ordered 1.

 I'll post how it came out.



*

*

kpaviat(at)verizon.net
Guest

Posted: Wed Oct 11, 2006 7:39 am Post subject: 914 OIL PRESSURE

Amazing how much that bronze ring costs!!

 I got my replacements from a VW supplier at a reasonable cost. Anyway, the next time my sensor fails I’m mounting it remotely...

 kp      [quote][b]

acrojim(at)cfl.rr.com
Guest

Posted: Wed Oct 11, 2006 4:31 pm Post subject: 914 OIL PRESSURE

I know that some of the early Katana's had a  Service Bulletin or AD to move the oil pressure sender from the engine to the  firewall, and to hook it up with flexible hose.

  

 The oil pressure sender is just not happy mounted  on the engine.

  

 Jim Brown

 [quote]   ---

ami(at)mcfadyean.freeserv
Guest

Posted: Thu Oct 12, 2006 12:10 am Post subject: 914 OIL PRESSURE

Or transfer the 'bronze' ring; it's only glued  on!

  

 Duncan Mcf.

 [quote]   ---

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