5 year rubber alternatives

[seagull]

My 5 year is coming up. I already have teflon fuel and oil hoses. The things I see on the list that I will need are;

267-789, carb rubber flange, I see one from JBM that is cheaper, any reviews?
861-116, carb diaphragm, do these go bad?
922-250, coolant hose 17mm, where is the cheapest place for this? How much is required?
922-192, coolant 90 degree, I have not found an alternative to Rotax.
230-910, intake manifold O-Rings, Mc Master Carr 9263K656
950-143, brass gasket, what is this for, does it go bad?
881-920, O-Ring set, where are these used, what are the sizes?

opinions / recommendations welcome.

[RFSchaller]

I used 5/8” heater hose for my coolant hose replacement at the suggestion of one of the ROTAX course instructors. Three and a half years (ver 300 hours) and no problem.

[TS Flightlines]

For the molded hose, try high temp silicone molded heater hose. Pegasus Racing and others have it in 1'' diameter and you can cut it to fit. Works well with Dexcool.

Tom

[Piper J3]

Maybe we can make a BOM for the coolant hoses.

If I remember correctly, you need one molded hose.

17mm = 0.669”
5/8” = 0.625”

Pegasus Racing Supplies:

SHL16-BLUE
Blue Silicone Hose, Straight, 5/8 inch ID, 1 Meter Length $27.29


E90.16-BLUE
Blue Silicone Hose, 5/8" I.D. 90 degree Elbow, 4" Legs $12.49


SHL25-BLUE
Blue Silicone Hose, Straight, 1 inch ID, 1 Meter Length $31.49

Looks like 17mm Silicone heater hose can be sourced from MiniMania

Heater Hose Silicone 17mm Bore, 36 Long Red

Part No: C-GRH1008RED $39.01 3 Day Shipping ~ $10

[seagull]

Jim,
Is the silicone superior to the OEM?
Will it last longer than the expected 5 years?
Will the stock clamps work? i know some silicone cuts easily.

[Piper J3]

This thread is timely - I will do my 5-year coolant hoses at next Annual Condition Inspection.

I think silicone is probably superior to black rubber hose. I Googled silicone heater hose Vs. black rubber... Silicone hoses benefit from superior flexibility compared to rubber. They maintain this flexibility over their lifespan unlike rubber hoses. This reduces the risk that your hoses will split, harden, or become dry rotted. Silicone hoses last practically forever and might possibly outlast your car.

Check out this thread... https://vansairforce.com/community/s...&postcount=362. Honda 1.8L being installed on RV-6A.

[seagull]

I would like to hear from someone that has used the silicone. Logic tells me it would be better. I can't pull this ship to the curb as easily as the car if I blow a hose.

Scott,
Do you have any input on this topic?

[seagull]

Found these;
https://www.amazon.com/HPS-HTSEC90-0...9524800&sr=8-4

https://www.amazon.com/HPS-reinforce...9525028&sr=8-3

[seagull]

Can anyone give me the dimensions, length of the legs, on the water tube 922-122. This is the 90 degree bent hose that can't be replaced with bulk hose.

The silicone 90 hose I am looking to buy has a 1" radius vs the shallow bend the Rotax hose has. Is there any reason this wouldn't work?

I am trying to avoid removing the cowl.

[seagull]

Thanks,

Yes I meant 922-192.

The silicone one, also available in black.