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  #131  
Old 05-06-2019, 09:01 PM
dmattmul dmattmul is offline
 
Join Date: Dec 2015
Location: Spring Hill, FL
Posts: 60
Default Bing carbs

I have these same floats on a HKS700E flying for the last 2 years. Building a RV-14A and about 50% though this airframe. Engine arrives in a few week. I dropped the bowl on my 2 Bing 64CV carbs on my engine. 3 were at 3.1 grams and the third at 3.38 grams. Will keep an eye on these. Great posts on VAF, thanks for letting me know of the issue. HKS never said a thing.
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RV-14A QB building, Lycoming 390 Thunderbolt arrived July 2019, Garmin avionics, Vertical Power, EFII-32 Ignition and Fuel, hope to be flying Spring of 2020 !! Dues paid+ of course !!
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  #132  
Old 05-19-2019, 06:44 AM
Piper J3's Avatar
Piper J3 Piper J3 is offline
 
Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 1,494
Default

It looks like I’m joining the “club” myself. I’ve been having rough engine in mid-range and now rough idle after hot restart. 5500 rpm cruise remains very smooth. Yesterday’s flight had a slight fuel vapor smell in initial climb. These floats are original with 425TT using 93E10 exclusively.

I’d like to use Marvel-Schebler floats but they are unavailable. Last we heard they are redesigning to achieve 7-gram weight. So, I placed an order with LEAF for 861-189 floats and new bowl gaskets. $345...

I’ll install floats later this week and report back on condition/weights of floats as removed. The old floats will be left out to “dry” and then stowed in the airplane to be used on-the-road if necessary.
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Jim Stricker
Hinckley, Ohio (1OA2)
EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
RV-12 E-LSA #120058 AWC July 2012 N633CM
RV-12 Bought Flying Oct 2015 with 48TT - Hobbs now 490

LSRM-A Certificate 2016
Special Thanks... EJ Trucks - Crew Chief A-4 Skyhawk
MJ Stricker (Father & CFI) - 1st Lt. Captain B-17H
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  #133  
Old 05-19-2019, 08:40 AM
bobg56 bobg56 is offline
 
Join Date: Nov 2018
Location: Peachtree City, GA
Posts: 68
Default

That was the first sign, smelling gas at climb out, I put about 50 hours on them is all, then got the -189C from Lockwood, we'll see how long these last.
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  #134  
Old 05-19-2019, 10:47 AM
NinerBikes NinerBikes is offline
 
Join Date: Dec 2018
Location: Granada Hills
Posts: 186
Default

Quote:
Originally Posted by Piper J3 View Post
It looks like I’m joining the “club” myself. I’ve been having rough engine in mid-range and now rough idle after hot restart. 5500 rpm cruise remains very smooth. Yesterday’s flight had a slight fuel vapor smell in initial climb. These floats are original with 425TT using 93E10 exclusively.

I’d like to use Marvel-Schebler floats but they are unavailable. Last we heard they are redesigning to achieve 7-gram weight. So, I placed an order with LEAF for 861-189 floats and new bowl gaskets. $345...

I’ll install floats later this week and report back on condition/weights of floats as removed. The old floats will be left out to “dry” and then stowed in the airplane to be used on-the-road if necessary.
Why don't you experiment with them with a coat of epoxy, instead, like you said you would with other's floats? Now you have your own pair to experiement with?
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  #135  
Old 05-19-2019, 12:08 PM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 3,932
Default

The Type "A" tank sealant has the consistency of honey. If anyone is trying a Pro-Seal coating, if might be easier to start with that. Skygeek.com sells it.

It's normally used to overcoat the joints and rivet heads in tanks. I used a hobby syringe to apply it.

Dave
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  #136  
Old 05-20-2019, 06:40 AM
John-G John-G is offline
 
Join Date: Jan 2012
Location: Northeast Ohio
Posts: 589
Default

Quote:
Originally Posted by Piper J3 View Post
Yesterday’s flight had a slight fuel vapor smell in initial climb.
Jim - I've had this symptom before this time of year ..... even with new floats. I think some of it could be using winter blended auto fuel when the temperatures are becoming summer like. As an example, last spring I caught a slight whiff of fuel during takeoff on one of the first warm days of spring after being on the ground for quite a while holding for traffic. I went to the hangar and drained out enough fuel to add 100LL to get the mixture around 30% and ran that way until the summer fuel hit the service stations June 1. Never a hint of fuel smell nor all summer long while running the summer blend. Then after the winter blend began September 1 there were a couple of warm days where I was held on the ground longer than usual and once again there was a slight whiff of fuel.

So although the carb floats have been, and apparently continue to be, truly problematic ... one can't overlook the reality that using winter blended auto fuels on warm days is also problematic. Frankly, I for one can't wait until the new crop of unleaded aviation fuels with a consistent RVP (Reid vapor pressure) are available at all airports.

Happy flying,
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www.dogaviation.com
RV-12 Wings, Empennage, Fuselage, Finishing, Avionics and Powerplant kits all completed
Now Flying!!

Dues paid until September 2020

Last edited by John-G : 05-20-2019 at 07:05 AM.
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  #137  
Old 05-23-2019, 01:05 PM
AirHound AirHound is offline
 
Join Date: Oct 2006
Location: OFallon IL now, everywhere before
Posts: 311
Default Whiff's

John, this is Doug in IL. Thanks for your build and now opns experiences, neat to follow! In this thread, in addition to gas, the word that comes to mind is also Carbon Monoxide. Assuming the path of that gas 'whiff' you notice from time to time involves the firewall, have you checked in all phases of flight, throughout the seasons, for CO leaks with a sensitive detector?
Thank you!


Quote:
Originally Posted by John-G View Post
Jim - I've had this symptom before this time of year ..... even with new floats. I think some of it could be using winter blended auto fuel when the temperatures are becoming summer like. As an example, last spring I caught a slight whiff of fuel during takeoff on one of the first warm days of spring after being on the ground for quite a while holding for traffic. I went to the hangar and drained out enough fuel to add 100LL to get the mixture around 30% and ran that way until the summer fuel hit the service stations June 1. Never a hint of fuel smell nor all summer long while running the summer blend. Then after the winter blend began September 1 there were a couple of warm days where I was held on the ground longer than usual and once again there was a slight whiff of fuel.

So although the carb floats have been, and apparently continue to be, truly problematic ... one can't overlook the reality that using winter blended auto fuels on warm days is also problematic. Frankly, I for one can't wait until the new crop of unleaded aviation fuels with a consistent RVP (Reid vapor pressure) are available at all airports.

Happy flying,
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  #138  
Old 05-24-2019, 06:26 AM
John-G John-G is offline
 
Join Date: Jan 2012
Location: Northeast Ohio
Posts: 589
Default

Doug -

To answer your question. No ... I have not tested for CO probably not a bad idea to do so.

That said, I have flown very slow steep angles of attack for extended periods of time and have never had the slightest whiff of fuel while in the air. I have never had the slightest whiff of fuel while using a blend of at least 30% 100LL and winter blend auto fuel with ethanol. I have never had the slightest whiff while using summer blend auto fuel.

The ONLY times I have the hint of any fuel smell is during climb-out when there is winter blended auto fuel in the tank ... typically during a really warm day and/or I have been held on the ground for an extended period of time by ATC.

Happy flying,

John
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John
www.dogaviation.com
RV-12 Wings, Empennage, Fuselage, Finishing, Avionics and Powerplant kits all completed
Now Flying!!

Dues paid until September 2020
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  #139  
Old 05-24-2019, 02:19 PM
Piper J3's Avatar
Piper J3 Piper J3 is offline
 
Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 1,494
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Follow-up to post #132 above...

So, I spent $345 plus shipping for two sets of 861-189 floats and two gaskets. I did the installation this morning and took my digital gram scale with me to measure the old floats, and you guessed it, each pair of floats weighed less than 7 grams. Original floats with 428TT and 100% 93E10. Nuts...
__________________
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Jim Stricker
Hinckley, Ohio (1OA2)
EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
RV-12 E-LSA #120058 AWC July 2012 N633CM
RV-12 Bought Flying Oct 2015 with 48TT - Hobbs now 490

LSRM-A Certificate 2016
Special Thanks... EJ Trucks - Crew Chief A-4 Skyhawk
MJ Stricker (Father & CFI) - 1st Lt. Captain B-17H
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  #140  
Old 05-24-2019, 03:40 PM
DaleB's Avatar
DaleB DaleB is offline
 
Join Date: Sep 2012
Location: Omaha, NE (KMLE)
Posts: 2,122
Default

Well, on the bright side... they're returnable for 90 days.
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Omaha, NE
RV-12 # 222 N980KM "Screamin' Canary" (bought flying)
Fisher Celebrity (under construction)
Previous RV-7 project (sold)
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