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philipguziec(at)yahoo.com
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 Posted: Tue Jun 16, 2009 1:13 pm Post subject: IO 720 fuel pump and pressure |
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Cross posted to fish for IO 720 experience.
Well, my new bird, which apparently the FAA designates as a SW50, is safely snugged into a heated community hangar at UGN, and I'm eagerly looking forward to transition traning. However, on the delivery flight, teh right engine (IO 720) showed a fuel pressure of 16 psi when running on the engine driven fuel pump which was recently replaced (for the second time). After the replacement, the fuel pressure tested fine, but on the short flight to UGN it showed 16 vs a 22 to 25 psi target range. The boost pump works in the 22-25 range.
The pump is adjustable, so the pressure can be raised. However, is this likely the result of a break-in drift in fuel pressure or should I be concerned that the pump will soon fail? I don't recall a fuel pressure drift after the install of a new fuel pump on my IO 360, and I'm assuming this is of a similar design.
Thoughts?
Phil
SW50
M20E Turbo
UGN
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kamala(at)MSN.COM
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| Posted: Wed Jun 17, 2009 5:00 am Post subject: IO 720 fuel pump and pressure |
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would call lycoming for good info. gmc (io-720 also)
[quote] Date: Tue C 16 Jun 2009 14:12:56 -0700
From: philipguziec(at)yahoo.com
Subject: IO 720 fuel pump and pressure
To: beech-owners(at)beechcraft.org; mooney(at)aviating.com; commander-list(at)matronics.com; lycomingengines-list(at)matronics.com
--> Commander-List message posted by: Philip Guziec <philipguziec(at)yahoo.com>
Cross posted to fish for IO 720 experience.
Well C my new bird C which apparently the FAA designates as a SW50 C is safely snugged into a heated community hangar at UGN C and I'm eagerly looking forward to transition traning. However C on the delivery flight C teh right engine (IO 720) showed a fuel pressure of 16 psi when running on the engine driven fuel pump which was recently replaced (for the second time). After the replacement C the fuel pressure tested fine C but on the short flight to UGN it showed 16 vs a 22 to 25 psi target range. The boost pump works in the 22-25 range.
The pump is adjustable C so the pressure can be raised. However C is this likely the result of a break-in drift in fuel pressure or should I be concerned that the pump will soon fail? I don't recall a fuel pressure drift after the install of a new fuel pump on my IO 360 C and I'm assuming this is of a similar design.
Thoughts?
Phil
SW50
M20E Turbo
UGN
>
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