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914 Oil pressure

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daseitz(at)cfl.rr.com
Guest

Posted: Sat Apr 01, 2006 1:29 pm Post subject: 914 Oil pressure

My 914 has developed a fluctuation on the oil pressure gauge recently. I

have a UMA 1 1/2" gauge with the rotax sender. The gauge is very sensitive

and will fluctuate wildly sometimes. I tried another sender with same

results. No wiring problem found anywhere. Today I installed a mechanical

oil pressure gauge to see what it did. While flying it does fluctuate a

little, not wildly like the electric probably due to the dampening effect of

the very small diameter long oil line going to the gauge. It looks like the

problem is in the oil system not the gauge.

Has anyone had this kind of bouncing of the oil pressure in their 914?

What did you find was the cause?



Thanks



Dean Seitz

N284A  XS Tri  914 Airmaster CS

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Ivor Phillips

Joined: 16 Jan 2006
Posts: 253
Location: London UK

Posted: Sun Apr 02, 2006 4:16 am Post subject: 914 Oil pressure

Hi Dean



Check the oil pressure relief valve is not sticking, Or the spring isn't 

damaged, At the same time i would change the oil and filter, I would use the 

genuine Rotax oil filter, Another possibility is air is being drawn in to 

the oil galley, Between the oil tank and pump, Also check the rubber sealing 

ring on top of the oil tank.



http://www.ultralightnews.ca/rotax912/912-914oilPump.htm



Oil Filters

Only the Rotax-recommended oil filter (part 825 701) should be used. Only 

those filters assure the correct pressure for bypass valve operation. Other 

filters have less filtering surface and are not made to withstand the high 

oil pressures the Rotax 4-stroke engines operate at.



To be avoided:



  a.. Any other filter than Rotax part 825 701. There are no equivalents or 

substitutes!

  b.. Contrarily to what some rumours would like you to believe, Rotax does 

not authorize the use of any other filter!

Subject: 914 Oil pressure

. Today I installed a mechanical

 	  Quote: 	
		   oil pressure gauge to see what it did. While flying it does fluctuate a

 little, not wildly like the electric probably due to the dampening effect 

 of

 the very small diameter long oil line going to the gauge. It looks like 

 the

 problem is in the oil system not the gauge.


	




Ivor Phillips

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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