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clivesutton
Joined: 23 Jan 2013
Posts: 187
Location: KENILWORTH
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 Posted: Sun Nov 24, 2013 9:31 am Post subject: 912S replacement fuel lift pumps |
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Hi all,
I got a letter from Rotax recently telling me that I was entitled to a free replacement lift pump for a 912S AC pump I bought to solve a problem in 2009. The fuel pump fitted to the original engine began spitting out fuel (yes fuel), from the oil vent hole underneath. On changing it from the original to a Rotax-supplied AC pump, my fuel economy improved by about 1 litre/hr.
Anyway, I collected the new design/free pump on Friday and fitted it to the engine over the weekend - but I envisage a fit problem with the cowling - as the latest pump body is larger. It touches (only just) on the pump body - please see attached pic. Wondered if anyone has had the same problem and what they did about it please?
Clive Sutton
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budyerly(at)msn.com
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| Posted: Sun Nov 24, 2013 3:47 pm Post subject: 912S replacement fuel lift pumps |
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Clive,
I have installed two of the pumps and had no problem with clearance on the cowl. I have not seen your pics. Could you please forward them to my personal site: budyerly(at)msn.com (budyerly(at)msn.com).
The new pump has a different flow rate and higher pressure. Lockwood Aviation (Local Rotax Dealer) cautioned me about the higher pressure to the 912S carbs, but our fuel pressure is still below the 5.8PSI max. Your liter per hour seems like a very large improvement in fuel economy. Check your EGT and temps in that it may be leaning on you a bit. A line may be pinched or clogged.
Regards,
Bud Yerly
| Quote: | Subject: 912S replacement fuel lift pumps
From: clive.maf(at)googlemail.com
Date: Sun, 24 Nov 2013 09:31:29 -0800
To: europa-list(at)matronics.com
--> Europa-List message posted by: "gtagr" <clive.maf(at)googlemail.com>
Hi all,
I got a letter from Rotax recently telling me that I was entitled to a free replacement lift pump for a 912S AC pump I bought to solve a problem in 2009. The fuel pump fitted to the original engine began spitting out fuel (yes fuel), from the oil vent hole underneath. On changing it from the original to a Rotax-supplied AC pump, my fuel economy improved by about 1 litre/hr.
Anyway, I collected the new design/free pump on Friday and fitted it to the engine over the weekend - but I envisage a fit problem with the cowling - as the latest pump body is larger. It touches (only just) on the pump body - please see attached pic. Wondered if anyone has had the same problem and what they did about it please?
Clive Sutton
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