---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Thu 11/18/10: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:33 AM - Fuel pressure question (Watkinsdw) 2. 12:21 PM - Re: Pneumatic tail wheel for FS-2 (Jimmy Young) 3. 03:11 PM - Re: Fuel pressure question (John Hauck) 4. 03:33 PM - Re: Fuel pressure question (John Hauck) 5. 08:25 PM - Kolb Firestar Winter storage (Dennis Thate) 6. 08:53 PM - Re: Kolb Firestar Winter storage (Richard Girard) ________________________________ Message 1 _____________________________________ Time: 09:33:29 AM PST US Subject: Kolb-List: Fuel pressure question From: "Watkinsdw" Greetings, Kolbers, When I decrease throttle from cruise flight to approach-to-land, I'll go from about 4800 rpms to about 3200 rpms. This frequently triggers my Grand Rapids EIS alarm, indicating high fuel pressure. It reads 6.3 to 6.4 psi, and hovers around there till I land. I've got the alarm set at 6.2psi. The Rotax 912 book calls for a fuel pressure range of 2.2 to 5.8. My question is, should I be worried, or is a temporary excessive fuel pressure condition acceptable? Anyone else had this experience? I checked with Lockwood and they said a 600-hour engine should be showing low fuel pressure if there was wear occurring, not high. They thought it might be a bad or fouled sending unit. I figure the risk of high pressure is that it might overpower the needle valve in the carb float chamber and cause flooding. This hasn't occurred yet, and I'd prefer that it doesn't! Thanks in advance for your help, Dave Watkins MK-IIIC w/ Rotax 912 630 hours, TT 100 hours flying it Pompano Beach, FL Read this topic online here: http://forums.matronics.com/viewtopic.php?p=319931#319931 ________________________________ Message 2 _____________________________________ Time: 12:21:32 PM PST US Subject: Kolb-List: Re: Pneumatic tail wheel for FS-2 From: "Jimmy Young" > I wanted to check if any of you have modified your standard Kolb tail wheel to a pneumatic wheel/ tire. Mahesh, I did this on my Firestar. I bought a wheel at Tractor Supply that is soft rubber, about 5" dia., cost maybe $10, and had a guy weld up a wheel attach bracket that duplicated the original. I used to get stuck in pavement joints with the old "pie cutter" wheel when at an airport. This one has worked well for about 3 years now. -------- Jimmy Young Missouri City, TX Kolb FS II/HKS 700 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=319952#319952 Attachments: http://forums.matronics.com//files/100_0070_210.jpg http://forums.matronics.com//files/100_0069_957.jpg ________________________________ Message 3 _____________________________________ Time: 03:11:26 PM PST US From: "John Hauck" Subject: Re: Kolb-List: Fuel pressure question > My question is, should I be worried, or is a temporary excessive fuel pressure condition acceptable? > > Dave Watkins Dave W/Gang: 10ths of a psi? If it was mine, I would worry too much. I have no fuel pressure indicator and all three of my 912 engines have done just fine on the engine driven pump and when I am running both the Facet and the engine driven pump. How accurate do you think your instrumentation is? john h mkIII Gila Bend, AZ - Was one of my refuel stops in 1994, on my way to Alaska. Remember the OAT was 114F, and I saw my first Road Runner here. ________________________________ Message 4 _____________________________________ Time: 03:33:47 PM PST US From: "John Hauck" Subject: Re: Kolb-List: Fuel pressure question > 10ths of a psi? If it was mine, I would NOT worry too much. Sorry about the omission of NOT in my previous. Getting old, losing memory fast. john h mkIII Gila Bend, AZ ________________________________ Message 5 _____________________________________ Time: 08:25:28 PM PST US Subject: Kolb-List: Kolb Firestar Winter storage From: "Dennis Thate" I've just purchased a Kolb Firestar / Rotax 503 ULDCDI , I'm putting it in Winter storage. What is the best protocal for storing the Rotax 503UL DCDI for five months ? Thanks Read this topic online here: http://forums.matronics.com/viewtopic.php?p=319987#319987 ________________________________ Message 6 _____________________________________ Time: 08:53:41 PM PST US Subject: Re: Kolb-List: Kolb Firestar Winter storage From: Richard Girard Dennis, Get a spray can of misting oil from the local boat shop. Warm the engine to operating temp, shut it down, remove air filter(s), restart engine and bring throttle up to about 3000 RPM, spray misting oil into carb throats until engine dies. Remove a spark plug from each cylinder and spray oil into cylinders. Replace plugs, seal exhaust with a small rubber ball when it's cool enough not to melt the ball. I use a piece of thick plastic over each carb throat ( a zip lock freezer bag is perfect material ) and put air filter(s) back on. See two stroke Operations Manual 11.1.3, page 11-2 for more detailed instructions, but this will get you in the ball park. Rick Girard On Thu, Nov 18, 2010 at 10:22 PM, Dennis Thate wrote: > > I've just purchased a Kolb Firestar / Rotax 503 ULDCDI , I'm putting it in > Winter storage. What is the best protocal for storing the Rotax 503UL DCDI > for five months ? > > > Thanks > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=319987#319987 > > -- Zulu Delta Kolb Mk IIIC 582 Gray head 4.00 C gearbox 3 blade WD Thanks, Homer GBYM It is not bigotry to be certain we are right; but it is bigotry to be unable to imagine how we might possibly have gone wrong. - G.K. 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