-1 Fuel System
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-1 Fuel System

22 Posts
10 Users
Carsten H. Hauge
Posts: 129
Estimable Member

From Marvel-Schebler service bulletin:  Foam floats may deteriorate in certain fuels and fuel additives. Brass floats, regardless of manufacturer, may crack, leak, corrode, and/or mechanically fail. White plastic hollow floats may leak. Deteriorated, leaking, or broken floats can negatively affect engine performance, regardless of the identity of the manufacturers of such floats. Volare and its immediate predecessor Precision Airmotive have worked arduously to address these issues by developing the first solid, blue epoxy composite float. This float is impervious to the fuels and fuel additives used in the aviation industry today. The solid, blue epoxy float is not a “foam” float. It is not a thermoplastic. It has no soldered or riveted joints. Being solid, it cannot fill with fluid and sink, even if pierced. The float is essentially chemically inert. The stainless steel bracket is cast securely into the float body and is not subject to separation in normal use. This float design has been in production for several years. It is installed in thousands of carburetors, including carburetors sold by Volare and its predecessor to current engine manufactures since its introduction. There are no known cases of failure or malfunction of this design.

The previous generation solid foam/plastic floats could in some cases absorb fuel and become heavy.


Posted : 17/09/2022 6:09 pm
Will Ware (Webmaster ISC)
Posts: 369
Reputable Member Admin

How much do they want for this new Blue float?

Posted : 18/09/2022 1:03 pm
Carsten H. Hauge
Posts: 129
Estimable Member

Looks as if Aircraft Spruce has the blue float: https://www.aircraftspruce.com/catalog/eppages/volare_float_kit_sm.php

This post was modified 3 months ago by Carsten H. Hauge
Posted : 18/09/2022 4:59 pm
Randall Clark
Posts: 8
Active Member
Topic starter

Thanks to all who gave me inputs. I finally had the opportunity to remove the rubber fuel hose connecting the right fuel tank to the rigid fuel line in the wing root.  Wow!  The hose was completely rotted on the inside and actually crumbling and blocked. Also my A&P said this hose that was used in 1995 for the rebuild was not even approved for fuel (MIL 6000?).  Glad we found something definitive so I can return to flying with confidence. I would highly recommend folks take a look at their hoses if they’ve been on there awhile.  This one looked great on the outside.  Thanks again. Gotta love the wealth of knowledge in this group. 

Randy Clark


This post was modified 2 months ago by Randall Clark
Posted : 07/10/2022 12:09 am
Posts: 282
Reputable Member

MIL-H-6000 is approved for fuel, coolant, oil, alcohol, and water. No hose should be in service 27 years unless its teflon inside and braided stainless on the outside. Ten years is my limit on rubber hose. Replacing the other side too?

Posted : 08/10/2022 11:20 am
Posts: 282
Reputable Member

Don't forget to make sure there is an electrical jumper wire around the section of rubber hose.

Posted : 12/10/2022 1:39 pm
Karl A. Vogelheim
Posts: 114
Estimable Member

Thanks for the information. I always like learning new stuff, especially from other peoples issues instead of my own. 🤣 

Karl A Vogelheim
S108-3 N596C

Posted : 19/10/2022 6:35 pm
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