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  #11  
Old 09-09-2020, 08:45 PM
seagull seagull is offline
 
Join Date: Dec 2019
Location: San Bernardino
Posts: 199
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I didn't think the Teflon fuel and oil lines had a life limit. Do they get replaced at 5 years?
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  #12  
Old 09-09-2020, 09:12 PM
tjo tjo is offline
 
Join Date: Dec 2009
Location: La Center,wa
Posts: 222
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Silicone is a good material and lasts well. It is soft, though, so tight hose clamps can damage it and it is not as abrasion resistant as epdm.

Tim
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  #13  
Old 09-10-2020, 09:29 AM
TS Flightlines TS Flightlines is offline
 
Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 2,718
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Mike----I have to disagree. The 912ULS uses the VA216 return hose, the 912IS uses a VA138.
The VA216 is a -4 with a restrictor for carbureted applications. The VA138 is a -6 without a restrictor for the injected models. Yes, both are teflon, and NOT service life limited. Yes----be prudent, and inspect them for outside damages.

Tom
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Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
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  #14  
Old 09-10-2020, 10:41 AM
seagull seagull is offline
 
Join Date: Dec 2019
Location: San Bernardino
Posts: 199
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Is there a time specified on the oil lines or are they on condition / inspect for outside damage?
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  #15  
Old 10-18-2020, 10:14 PM
seagull seagull is offline
 
Join Date: Dec 2019
Location: San Bernardino
Posts: 199
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All the critical hoses have now been replaced, The blue are silicone for the coolant.






Last edited by seagull : 10-27-2020 at 01:17 PM.
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  #16  
Old 10-19-2020, 09:02 AM
funflying funflying is offline
 
Join Date: Oct 2006
Location: arvada, co
Posts: 466
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Where was your source for the Blue Silicon hoses?
Im planning to replace mine at next annual. Thanks
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Patrick Claar
Arvada, CO BJC
RV12, #401, Flying 2013, N612PC
RV6, 1996-2010 sold
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  #17  
Old 10-19-2020, 10:12 AM
seagull seagull is offline
 
Join Date: Dec 2019
Location: San Bernardino
Posts: 199
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https://hpsperformanceproducts.com/

HPS 1" ID Blue High Temp Reinforced Silicone Heater Hose Tubing, 25mm ID Part Number: HTHH-100-BLUE

HPS 5/8" ID, 10" Leg, Silicone 90 Degree Elbow Coupler Hose, High Temp 4-ply Reinforced, Blue, 16mm ID Part Number: HTHH-062-BLUE

HPS 5/8" ID Blue High Temp Reinforced Silicone Heater Hose Tubing, 16mm ID Part Number: HTHH-025-BLUE

HPS 1/4" ID Blue High Temp Reinforced Silicone Heater Hose Tubing, 6mm ID Part Number: HTHH-025-BLUE

Do not use worm clamps on silicone hose they will damage the outside. I used this type for the 1 hose, they have an inner band to protect the hose and are spring tension to keep constant clamping force. McMaster-Carr 54205K17

The vans spring clamps fit on the 5/8 - 16mm silicone hose except the 90 degree one, it is a slightly thicker wall, get these clamps instead. Constant-Tension Spring-Band Clamps for 1-1/16" OD Hose and Tube. McMaster-Carr 7329K16

These same size hoses come in black, blue, red, clear.
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  #18  
Old 10-19-2020, 11:03 AM
funflying funflying is offline
 
Join Date: Oct 2006
Location: arvada, co
Posts: 466
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Great detail and explanation. Thanks
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Patrick Claar
Arvada, CO BJC
RV12, #401, Flying 2013, N612PC
RV6, 1996-2010 sold
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  #19  
Old 10-19-2020, 11:26 AM
seagull seagull is offline
 
Join Date: Dec 2019
Location: San Bernardino
Posts: 199
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I also changed my carburetor sockets with these;
http://jbmindustries.com/912socket.html
Less $$ than Rotax and made better.
Their ordering is "different" but works.
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  #20  
Old 02-22-2021, 11:49 AM
John-G John-G is offline
 
Join Date: Jan 2012
Location: Northeast Ohio
Posts: 726
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Began ordering silicone coolant replacement hoses yesterday to comply with the Rotax's 5 year rubber replacement. (Actually found green silicone coolant hoses that should compliment the green valve covers and green painted air shroud over the cylinders).

I see the rubber hoses on either side of the carburetor balance tube are also on the 5 year replacement list.

The Lockwood site shows that hose as having a 11mm ID ... so wondering if anybody has found a good source for 11mm ID black silicone hose to replace Rotax's rubber hoses on the balance tube? It appears 11 mm (.443") ID or 7/16" (.438") is an oddball size as the web sites I've been searching seem to skip from 3/8" ID to 1/2" ID.
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http://www.dogaviation.com/

RV-12 Wings, Empennage, Fuselage, Finishing, Avionics and Powerplant kits all completed
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