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-----Original Message-----
From: Ercoupe Technical Discussion (moderated) <[email protected]>
To: Ercoupe Technical Discussion (moderated) <[email protected]>
Sent: Sun, 01 May 2005 00:00:47 -0700
Subject: Digest list: Ercoupe Technical Discussion (moderated)
----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- Message list: 1. [COUPERS-TECH] which 2. [COUPERS-TECH] Engine noise 3. Re: [COUPERS-TECH] Engine noise 4. Re: [COUPERS-TECH] Engine noise 5. Re: [COUPERS-TECH] water in the gas Messages: From: alan1 <[EMAIL PROTECTED]> To: ercoupe list <[email protected]> Reply-To: alan1 <[EMAIL PROTECTED]> Subject: [COUPERS-TECH] which No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.11.0 - Release Date: 04/29/05 ---------------------------- From: "Steve" <[EMAIL PROTECTED]> To: <[email protected]> Reply-To: "Steve" <[EMAIL PROTECTED]> Subject: [COUPERS-TECH] Engine noise Today after 3 years on the ramp I attempted to get my aircoupe in the air. While taxiing I pulled the throttle back to approximately 550 to 600 rpm where the engine ran rough and I briefly heard a metallic clanging sound. After several attempts to repeat this noise I returned to the hanger to pick up my mechanic and while taxiing was briefly able to repeat this noise. My mechanic was unable to determine the cause of the sound but did agree that it was intermittent. We returned to the hanger and checked the compression it was 74, 72, 74, 76. Does anyone have any idea what could be causing this noise? What does is sound like when the valves are sticking? The noise only occurs at very low idle with the engine running rough and then it is only intermittent. Any help would be greatly appreciated. Thanks Steve T. 5634F ---------------------------- From: John Cooper <[EMAIL PROTECTED]> To: [email protected] Reply-To: John Cooper <[EMAIL PROTECTED]> Subject: Re: [COUPERS-TECH] Engine noise At 06:04 PM 4/30/2005, you wrote: >Does anyone have any idea what could be causing this noise? Could it be the impulse couplings coming back in due to the low RPM? How rough was it running? A stuck valve makes it a 3 cylinder. It'll run REALLY rough. John Cooper Skyport Services PO Box 249 4996 Delaware Tnpk Rensselaerville, NY 12147 518 797-3064 ---------------------------- From: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> To: <[email protected]>, "Steve" <[EMAIL PROTECTED]> Reply-To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> Subject: Re: [COUPERS-TECH] Engine noise CHECK YOUR MAG TIMING DICK NANCY & SOPHIE -------Original Message------- From: Steve Date: 04/30/05 15:04:50 To: [email protected] Subject: [COUPERS-TECH] Engine noise Today after 3 years on the ramp I attempted to get my aircoupe in the air. While taxiing I pulled the throttle back to approximately 550 to 600 rpm where the engine ran rough and I briefly heard a metallic clanging sound. After several attempts to repeat this noise I returned to the hanger to pick up my mechanic and while taxiing was briefly able to repeat this noise. My mechanic was unable to determine the cause of the sound but did agree that it was intermittent. We returned to the hanger and checked the compression it was 74, 72, 74, 76. Does anyone have any idea what could be causing this noise? What does is sound like when the valves are sticking? The noise only occurs at very low idle with the engine running rough and then it is only intermittent. Any help would be greatly appreciated. Thanks Steve T. 5634F ============================================================================= To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers-tech/ I am a new owner of 3948 H. if someone could please take the time to explain the feeling system. I would greatly appreciate it. It seems when I fill the center tank. It overflows from the wing tanks. Thanks Ken sponagle ---------------------------- From: Yvon Clément <[EMAIL PROTECTED]> To: <[email protected]> Reply-To: Yvon Clément <[EMAIL PROTECTED]> Subject: Re: [COUPERS-TECH] water in the gas I also found some water in my fuselage tank. After having read all this, I've checked again where that could come from and I noticed that the grommet around the header gauge cap is cracked. It has gone dry with time and I think that the water could get in by there... Could that be... Thanks Yvon C-FLUN ----- Original Message ----- From: "Hartmut Beil" <[EMAIL PROTECTED]> To: "Allen W Rothenberg" <[EMAIL PROTECTED]>; <[email protected]> Sent: Thursday, April 28, 2005 4:26 AM Subject: Re: [COUPERS-TECH] water in the gas > ----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- > > > Allen. > I had similar signs in my Coupe a few years ago. The gascolator was always > showing an inch or more of water and the mains were totally free of any. > All the time I owned the coupe, I never had any water in the fuel system, > even with the plane tied down outside. > I was using a mix of Avgas and Mogas successfully - never had a problem. Why > now the change? > > It turned out that California started using alcohol in the Autogas to get > rid of the MTBE additive. > Alcohol absorbs water but also mixes with gas. So the main tanks always > looked good. But to my surprise, the gascolator managed to take the water > out of the alcohol-gas solution. > > I stopped using mogas in California and gradually the water disappeared. > > > Hartmut > > > > ----- Original Message ----- > From: "Allen W Rothenberg" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Thursday, April 28, 2005 3:46 AM > Subject: [COUPERS-TECH] water in the gas > > > > ----[Please read http://ercoupers.com/disclaimer.htm before following any > advice in this forum.]---- > > > > > > Dick Delanoy's post prompted me to raise some similar questions. We have > been getting and inch or more of water when we drain the gascolator. Almost > none ever when we drain the tanks. I thought it was the header gauge cap, > but that has been repaired and we still get the contamination. Looking at > the fuel system, it seems that it must be from the header, but then why > don't we get any in the left tank? Is a puzzlement. Any ideas? > > > > Allen Rothenberg > > N94898 > > > ============================================================================ > == > > To leave this forum go to: http://ercoupers.com/lists.htm > > Search the archives on http://escribe.com/aviation/coupers-tech/ > > > > > > > > > ============================================================================ == > To leave this forum go to: http://ercoupers.com/lists.htm > Search the archives on http://escribe.com/aviation/coupers-tech/ > > > > ---------------------------- ============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers-tech/
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