---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Sat 11/28/09: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 0. 12:29 AM - No "Black Friday" For List Fund Raiser... (Matt Dralle) 1. 01:34 AM - Re: 912 hoses and clamps (Duncan & Ami McFadyean) 2. 07:52 AM - Re: 912 hoses and clamps (lucien) ________________________________ Message 0 _____________________________________ Time: 12:29:04 AM PST US From: Matt Dralle Subject: RotaxEngines-List: No "Black Friday" For List Fund Raiser... Even though the number of List subscriptions and List posts are up significantly this year compared to last year, support during this year's List Fund Raiser has been woefully lagging from last year. There are only a couple more days left in November and the end of the Fund Raiser is quickly approaching. I have always preferred a non-commercial List experience as many, many members have also expressed that they do as well. However, if the yearly fund raiser cannot generate sufficient funds to keep the bills paid on the List service expenses, I will have to look into some sort of advertising. Please don't let that happen! Your personal contribution of $20 or $30 goes a long ways to keeping the operation a float. The lunch combo at Carl's Jr costs nearly $10 these days. Isn't the List worth at least as much as a couple of burgers? Please make sure your name is on this year's List of Contributors published in December. The Contribution site is secure, quick, and easy: http://www.matronics.com/contribution Thank you in advance for your support! Matt Dralle Matronics Email List and Forum Administrator ________________________________ Message 1 _____________________________________ Time: 01:34:26 AM PST US From: "Duncan & Ami McFadyean" Subject: Re: RotaxEngines-List: 912 hoses and clamps The Rotax coolant hoses used to be marked as "heater hose" which 'gives away the game' in that these were not special. >From new I replaced my bottom hoses with nomex-reinforced silicone (which is only 16mm internal diameter) with no ill effect, and because I needed more heat resistance in proximity to the underslung exhaust. But the cost was USD1.50 per inch; similar cost to the Rotax-supplied heater hose! Also, the standard clamps are then too big for the smaller external diameter of this hose, unless packed-out. It surprises me that there have been no problems with the higher temperatures reached with Evans and the standard Rotax heater hose, which probably has only polyester reinforcing (not very heat resistant). Duncan McF ----- Original Message ----- From: Catz631@aol.com To: rotaxengines-list@matronics.com Sent: Thursday, November 26, 2009 1:18 PM Subject: RotaxEngines-List: 912 hoses and clamps The coolant hoses on my 912UL are almost 17 years old now and they are long over do for a change. I need 6 ft of 17mm hose . You can't buy this size anywhere in my area and to buy it from a Rotax distributer it is almost $120 ! (for 2 meters) That is a bit much for hose. The prior owner used 5/8 inch heater hose (15.9 mm) If that is the only why that I can do it, I will, but I would much prefer to use the proper size hose. I would also like to use the "proper" Corbin wire spring clamps rather than the standard auto hose clamps that are now on the engine. These wire clamps were listed at over $5 a piece from the same dealer and I need 16 ! Does anyone know of a good source for quality hoses and clamps ? Thanks Dick Maddux Kitfox 4 912UL Milton,Fl ________________________________ Message 2 _____________________________________ Time: 07:52:12 AM PST US Subject: RotaxEngines-List: Re: 912 hoses and clamps From: "lucien" [quote="ami(at)mcfadyean.freeserv"]The Rotax coolant hoses used to be marked as "heater hose" which 'gives away the game' in that these were not special. From new I replaced my bottom hoses with nomex-reinforced silicone (which is only 16mm internal diameter) with no ill effect, and because I needed more heat resistance in proximity to the underslung exhaust. But the cost was USD1.50 per inch; similar cost to the Rotax-supplied heater hose! Also, the standard clamps are then too big for the smaller external diameter of this hose, unless packed-out. It surprises me that there have been no problems with the higher temperatures reached with Evans and the standard Rotax heater hose, which probably has only polyester reinforcing (not very heat resistant). Duncan McF > --- The brand is actually written on it too - it's Gates heater hose. Unfortunately it doesn't even seem to be available from Gates themselves as an endless search of the Gates website ended up yielding nothing the last time I tried to find it there. You can also find a DIN standard that the hose meets written on the side of it. It turns out this is a German heater hose standard, so I suspect that's why Rotax wants you to use this particular hose. I went ahead and bought 2 meters of it for the shocking 120 or so bucks, since the search for similar 17mm id heater hose here in the US was beginning to approach that cost in terms of aggravation. I'm very reticent to use the wrong size hose (5/8 or 16mm) for this as the extra stress on the ends can cause cracking over a long period of time, the spring clamps don't fit etc...... My hoses are at about 5 years, but I'm going "on condition" on them as they don't show any signs of cracking and are still quite pliable. I'm still planning to replace the lot this coming summer tho because the other coolant hoses are going to need replacing anyway. So just going to do the lot all at once.... I figure that if I get another reliable 5 years out of the new hose, the 120 bucks for it will be down in the noise of the cost of 5 years of operation, so I'm not too upset about it and I know I have the right size/grade hose on it..... 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