k4cod(at)bellsouth.net
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 Posted: Thu Oct 24, 2013 4:53 am Post subject: Bing carb body |
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Sorry that it's taken me, only, six months to catch up on reading my Stratus emails. But I do have some recent experience/info on this subject.
Fortunately, I haven't had problems with the auto gas gumming up the carbs. But I did switch to avgas (100LL) for about a year; for other reasons. Recently, my engine ended up with a loss of compression on one cylinder. Remembering from the past when I've had lower compression aircraft engines (those designed to run on the old 80 octane avgas) that the 100LL, even though it's called Low Lead is actually very high in lead content and will form lead deposits on the valve seats; causing the valve to not seal well, I decided to run the engine some and see how it did. I tied the plane down well and ran the engine for a good warmup and a couple of full power runs. This caused the lead to clear and the compression came back up. I then proceeded with my plans and took my grandson for a ride to an airport about 60 miles south of us. All was uneventful. But when I went to the airport a few days later and pulled the engine thru to feel the compression, after the engine had cooled thoroughly, I now had almost no compression on three of the four cylinders. At this point, I decided that it was time to do two things. One, get the avgas out of the plane, and go back to car gas. And, two, do as I used to on one of my previous planes and add some TCP to the fuel. TCP used to be added to leaded car gas (most advertised by Shell; remember 'Buy Shell with TCP' was the slogan?) to scavenge out the lead. (By the way, lead in this situation can build up lead deposits on the spark plugs and foul out the plugs; saw it several times on my 150hp Lycoming in my Piper Tri-Pacer years back; that's how I learned about adding TCP) Anyway, I ran the engine, on the ground, for about 10 minutes with most of the fuel replaced with auto gas (ran out of gas cans to drain the avgas into) and TCP added. The compression came up nicely on two of the three low cylinders. The third one was still pretty mushy feeling. I decided to take it one spin around the pattern to get the temps up and work it at full power on takeoff. When I checked the next day, after a good cool down, three of the four cylinders were nice and snappy on compression, and the fourth one was almost there; just slightly less than the other three. So, I took it for a 45 minute flight and I'm very happy to say that all four cylinders are nice and strong/snappy on compression again. This is the same scenario that I remember from my past experiences with my Lycoming.
Anyway, sorry for the fairly long writeup. I just wanted to pass along some experience that I hope might be of some help to someone. The moral to the story is the avgas will run fine, just be careful about lead buildup long term in lower compression engines. Maybe this info will save someone from tearing the engine apart when the compression drops off for what turns out to be a simple reason.
Jim Weston
CH601HDS w/Stratus, flying it since 1998
From: owner-stratus-list-server(at)matronics.com [mailto:owner-stratus-list-server(at)matronics.com] On Behalf Of ron hansen
Sent: Friday, April 19, 2013 5:44 PM
To: stratus-list(at)matronics.com
Subject: Re: Bing carb body
Gary,
Sorry I don't have a carb body for you, but I can also say auto gas gummed up my carbs causing lots of delays and expense. Fortunately all prior to my first flight. I switched to avgas after getting the carbs cleaned out and I'm not going back. Auto gas starts getting cloudy and gummy very quickly especially her in California.
Ron Hansen
Los Angeles
On Thu, Apr 18, 2013 at 7:28 AM, gary krysztopik <pelican640(at)yahoo.com (pelican640(at)yahoo.com)> wrote:
Hello Stratus owners,
Does anyone have a Bing Model 64 carb or carb body that they could sell? Auto gas gummed up a jet and it broke off, and I wrecked the carb body trying to get it out.
I looked on ebay and there are a few old ones for about $120 so that's my plan right now.
I appreciate any help,
Gary
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