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  • Re: Where to buy 5 year rubber replacement kit

    by » 6 weeks ago


    A further thought provoking USA connection - https://vansairforce.net/threads/5-year-rubber-alternatives.186607/


  • Re: Where to buy 5 year rubber replacement kit

    by » 4 weeks ago


    I'm working on a certified RV12 with a 912 ULS for the 5-year rubber change and am looking for some clarification.

    1) Attached is the page from the line manual section 05 10 00 for time limit parts.  Under "Time limit for fuel pump", it states, "The fuel pumps must be replaced every 5 years".  Notice it says fuel "pumps", with an "s".  Are we supposed to change both the mechanical and electric fuel pumps?

    2) On a certified aircraft are there any stated certification levels that we are required to meet on the rubber hoses?  I've looked through the manuals and have found some minor references but nothing that states that this hose needs to have at least "this" certification.

    Thanks!

    Peter

    39428_2_Screenshot 2024-05-16 080829.jpg (You do not have access to download this file.)

  • Re: Where to buy 5 year rubber replacement kit

    by » 4 weeks ago


    Hi Peter,

    I've not seen a "certified" RV12. Is this an SLSA or an ELSA? I have seen a couple Light Sport aircraft with certified engine ...i.e. Tecnam


    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell


  • Re: Where to buy 5 year rubber replacement kit

    by » 4 weeks ago


    Thanks for the reply Roger.  Apologize, you are correct.  This is an SLSA, not certified.  The engine is a 912 ULS.  My concern is what can I install on the aircraft while maintaining compliance. For example, I can purchase the same Gates hoses through other sources at a fraction of the price that I could get them at aviation suppliers.  Buying the carb sockets at JBL Industries is a fraction of what I can purchase the official Rotax version, but can I use these on SLSA, or just ELSA?

    In addition, I was looking for input on the statement in 05 10 00 (attach in original question) concerning the fuel pumps. As I read it both the electric and mechanical fuel pump should be changed at the 5-yr rubber change, according to the manual. 

    Thanks!

    Peter


  • Re: Where to buy 5 year rubber replacement kit

    by » 4 weeks ago


    My .02 cents:

    Owners seem to have mixed ideas regarding this.

    I use Gates Barricade fuel hose. It's rated for any ethanol in the fuel you might use. I use the fuel injection hose on the 912iS engine and carburetor / vapor recovery hose on the carb models. The difference is the fuel injection hose is rated up to 100 psi and the vapor recovery hose is rated to 50 psi. Since the carbed engines are running 3.5 psi - 6 psi then that hose works fine at 50 psi. I've been using these hoses and so have many others for many many years and on tons of planes and never an issue. The issue with fuel injection hose is it has a stiffer sidewall so when trying to push it over barbed fittings it can strip away the inner liner because the hose has no give where as the carb hose has some give. I buy mine locally in 25' reels because I do a lot of rubber changes and it can be purchased by the foot. Even Rotax uses or used to use {?} Gates hose because it was in a Service Bulletin once. In Europe it's metric and in the USA our standard size.  For instance the difference in size is the US 5/16" is 4 tenths of 1mm difference. Not enough to lose any sleep over. I've done numerous pressure test with the different hose sizes and at times double and quadruple the pressure and never a failure or an instance where a hose wanted to come off a fitting or break. I've even tested the carb hose at 100 psi on fittings and never an issue. That said proper clamping is important. Don't under clamp it and don't over clamp it and crush it to death.

    As far as the fuel pumps go this may end up an owner decision. Replacement is in the time replacement section, but I know very few that replace theirs unless there starts to be an issue. I see some replace their mechanical pumps, but I haven't ever seen anyone change the electric pump at the 5 year rubber change.

     

    Just my .02 cents.

     


    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell


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