5 year rubber alternatives

[seagull]

I didn't think the Teflon fuel and oil lines had a life limit. Do they get replaced at 5 years?

[tjo]

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

[TS Flightlines]

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

[seagull]

Is there a time specified on the oil lines or are they on condition / inspect for outside damage?

[seagull]

All the critical hoses have now been replaced, The blue are silicone for the coolant.

[funflying]

Where was your source for the Blue Silicon hoses?
I’m planning to replace mine at next annual. Thanks

[seagull]

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.

[funflying]

Great detail and explanation. Thanks

[seagull]

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.

[John-G]

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.