mhenriquez
Member
Carb floats
Try Aircraft Spruce. I ordered on 1/27 and received a pair today.
Try Aircraft Spruce. I ordered on 1/27 and received a pair today.
I am doing my first inspection on my 12. All of the carb floats are over weight.
Have not been able to locate any replacements. All Rotax dealers tell me they are back ordered currently 30 days or indefinitely.
I only have 74 hours on the carbs.
Now that sucks.
Are these the 861-188 floats? Seem to be the -184 floats.
I bought a set of the 861-188's from Lockwood last week.
-nick
I'm frankly tired of replacing my floats - my 4th set just went bad (almost 600 hrs on the engine). I'm certainly not impressed with the quality of the Bing floats, or rather, I'm highly negatively impressed.
I'm actually experimenting with the MS floats. I measured the pin depth of known good Bing floats and the MS floats and found that the MS pin depth was approx. 1/32" lower than the Bing floats which means a slightly higher fuel level in the bowl - I wasn't sure how that would affect engine running. I've just recently started test flying the MS floats. I've been approaching it carefully and only have about 10 hrs on the MS floats. Various power settings from low RPM to WOT, altitudes, attitudes, multiple take-offs, etc. So far I don't see any difference between the MS floats and the Bings. Power, temperatures, etc. all seem perfectly normal so far.
I'm frankly tired of replacing my floats - my 4th set just went bad (almost 600 hrs on the engine). I'm certainly not impressed with the quality of the Bing floats, or rather, I'm highly negatively impressed.
I'm actually experimenting with the MS floats. I measured the pin depth of known good Bing floats and the MS floats and found that the MS pin depth was approx. 1/32" lower than the Bing floats which means a slightly higher fuel level in the bowl - I wasn't sure how that would affect engine running. I've just recently started test flying the MS floats. I've been approaching it carefully and only have about 10 hrs on the MS floats. Various power settings from low RPM to WOT, altitudes, attitudes, multiple take-offs, etc. So far I don't see any difference between the MS floats and the Bings. Power, temperatures, etc. all seem perfectly normal so far.
I just looked at MS website... Is $125 for single float or pair of floats (I hope, I hope)?
My floats were replaced at 500 hour overhaul of the carbs, but the originals still pass the weight test, so I keep them as spares.
Just because Lyc was mentioned...
You could do a UL Power engine...no carbs, no mags...just sayin’.
Do take the time to check these floats.
Do take the time to check these floats. I just checked 4 on an RV-12 that had all of them replaced late last year with the latest and greatest floats.
I weighed them yesterday and they were 10.6 and 8.5 grams respectively.
The customer did say the one side would intermittently overflow the carb.
Vic
Vic, how far reaching are reports of float problems?
I have no idea on that.
These are the floats on the 912 ULS.
Vic
Were they blue color or black color?
Bing carbs are from Germany... I am part German myself. That country, despite great car design and huge profit margins, still hasn't sent a man to the moon.Thanks for previous replies, - it seems that as well as sunk floats I had faulty, aged fuel. My situation & lifestyle sees me flying (or attempting to) only every few weeks or more. I had only 1/4 of a tank sitting for several weeks & after it was drained & refilled with Avgas 100LL the engine ran smoothly on the ground,- (unable to take it up due to inclement weather.) People here tell me that most schools with aircraft powered by Rotax 912 ULS engines use fresh BP95 Octane Mogas. Emphasis was placed on the fuel being FRESH. On my most recent attempt to get in the air I have discovered my fuel tank leaking from the level sensor plate on the front of the tank. When that new little problem is fixed I will try once again to commit Aviation. Cheers, DEAN
P.S, Mankind has sent men to the Moon, - how come we can't produce floats that float & continue to float??
Seems like another type of floats have been issued; Part No.861189. Hopefully this will end this sad saga.. Cheers, DEAN
I'm frankly tired of replacing my floats - my 4th set just went bad (almost 600 hrs on the engine). I'm certainly not impressed with the quality of the Bing floats, or rather, I'm highly negatively impressed.
I'm actually experimenting with the MS floats. I measured the pin depth of known good Bing floats and the MS floats and found that the MS pin depth was approx. 1/32" lower than the Bing floats which means a slightly higher fuel level in the bowl - I wasn't sure how that would affect engine running. I've just recently started test flying the MS floats. I've been approaching it carefully and only have about 10 hrs on the MS floats. Various power settings from low RPM to WOT, altitudes, attitudes, multiple take-offs, etc. So far I don't see any difference between the MS floats and the Bings. Power, temperatures, etc. all seem perfectly normal so far.
I posted this in October:
?I purchased and installed a pair of the Marvel Schebler floats. Weight out of the box was: 3.7 and 3.8 grams. They replaced a pair of Rotax floats that weighed 8.4 and 4.7 grams on removal. Needless to say I had a severe leak out of the overflow tube on my right carburetor.
Works great now.?
I noticed a strong fuel odor in flight which is why I started looking for a problem. The Bing/Rotax floats were over weight and one of the brass pins was very loose. I have not checked the floats in the left carburetor yet, but I have a pair of the MS floats ready to install.
Maybe the new Bing/Rotax floats will be better, but for me, the MS epoxy floats were a better alternative. MS has been using this material for carburetor floats for a long time.
95% Mogas with E10
... The Schebler floats are too heavy. This displaces more fuel inside the float bowl and that means the float armature needs to be adjusted to account for the extra fuel displacement. I haven't seen anyone here comment on how much fuel is displaced or how much they adjusted their float armature.
I?ve been through two sets of floats this year already. I?m told the new ones are clearing customs this week.
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- Or, maybe a slight difference in float level doesn?t matter too much in a carburetor that is used in an airplane. Imagine what the floats are seeing when the airplane is in bumpy air ? the entire quantity of fuel in the bowl would sometimes be thrown to the side or vertically to the top of the bowl. I would guess that the carburetor fuel bowl is a rather violent place when the airplane is in flight. It would be interesting to know how well the floats control fuel level in various flight regimes.
Burgundy Baron is down for "5-6 weeks" per LEAF for replacement float.
If anyone finds a vendor with a shorter lead time, please let me know.
thanks,
-dbh
mogas E-10 or LL100 for fuel?