---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Thu 07/15/10: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:48 AM - Re: RotaxEngines-List Digest: 2 Msgs - 07/14/10 (Stan Tew) 2. 05:58 AM - Re: Re: rough running at 3400 RPM and above (Catz631@aol.com) 3. 06:21 AM - Re: Re: rough running at 3400 RPM and above (Scott DeMeyer) 4. 07:15 AM - Re: RotaxEngines-List Digest: 2 Msgs - 07/14/10 (R&M Wis) 5. 07:26 AM - Re: rough running at 3400 RPM and above (rayw) 6. 03:34 PM - Re: Re: rough running at 3400 RPM and above (Geoff & Bin Bell) ________________________________ Message 1 _____________________________________ Time: 05:48:43 AM PST US From: Stan Tew Subject: RotaxEngines-List: Re: RotaxEngines-List Digest: 2 Msgs - 07/14/10 I suggested last week - it could be ignition. There are several components in the system. Start with the simple and easy Then work backward. Other words - start with the plugs - change them, then move to the wires etc.. STAN 2 ________________________________ From: RotaxEngines-List Digest Server Sent: Thu, July 15, 2010 1:58:22 AM Subject: RotaxEngines-List Digest: 2 Msgs - 07/14/10 * ================================================= Online Versions of Today's List Digest Archive ================================================= Today's complete RotaxEngines-List Digest can also be found in either of the two Web Links listed below. The .html file includes the Digest formatted in HTML for viewing with a web browser and features Hyperlinked Indexes and Message Navigation. The .txt file includes the plain ASCII version of the RotaxEngines-List Digest and can be viewed with a generic text editor such as Notepad or with a web browser. HTML Version: http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 10-07-14&Archive=RotaxEngines Text Version: http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 10-07-14&Archive=RotaxEngines =============================================== EMail Version of Today's List Digest Archive =============================================== ---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Wed 07/14/10: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:14 PM - Re: rough running at 3400 RPM and above (MacDonald Doug) 2. 08:56 PM - Re: Re: rough running at 3400 RPM and above (E. D. Eliot) ________________________________ Message 1 _____________________________________ Time: 07:14:14 PM PST US From: MacDonald Doug Subject: RotaxEngines-List: Re: rough running at 3400 RPM and above An update on my progress. I recieved the carb rebuild kits and have installed them. Tonight I ran the engine up and it runs a bit better but still not right. Now I am able to get it up to 3800 before it starts to miss and bog down. Again, I am still able to get it up to over 4000 RPM by pulling on the enrichener. I performed a full carb sync on it today. I was able to get the gauge needles to line up very nicely. While I had the carbs off for cleaning and rebuild, I pulled the carb sockets off and they are like new, no indications of leaks. I disconnected the fuel line where it goes into the engine fuel pump and checked for flow from the electric Facet I am using in lieu of gravity feed. There is a steady stream of fuel coming form the the line. I pulled the fuel lines at the carb and ran the Facet again and am getting lots out of the carb fittings too. Next, I disconnected the airbox from the carb and had my assistant run the engine up. I watched the carb slide and at 3800RPM, the slide was about two thirds to three quarters open. About where I think it should be at that power level. I'm starting to think this might be an ignition problem. All of the plugs are new and I gapped them when I installed them but I don't recall now what I gapped them to. I see in the maintenance manual it says to gap them to 0.027 to 0.031. I'll have to check that tomorrow and see where they are at. I don't know guys, any suggestions? Doug MacDonald CH-701, North Western Ontario, Canada ________________________________ Message 2 _____________________________________ Time: 08:56:48 PM PST US From: "E. D. Eliot" Subject: RE: RotaxEngines-List: Re: rough running at 3400 RPM and above No experience with Rotax yet but did solve a few 'automobile engine problem s' by first checking the resistance of the high tension wires. Once=2C I r eplaced spark plugs and one of the 'new' ones was bad. God luck - we=3Bll all learn from watching your progress. > Date: Wed=2C 14 Jul 2010 19:12:19 -0700 > From: dougsnash@yahoo.com > Subject: RotaxEngines-List: Re: rough running at 3400 RPM and above > To: rotaxengines-list@matronics.com > com> > > An update on my progress. I recieved the carb rebuild kits and have inst alled them. Tonight I ran the engine up and it runs a bit better but still not right. Now I am able to get it up to 3800 before it starts to miss an d bog down. Again=2C I am still able to get it up to over 4000 RPM by pull ing on the enrichener. > > I performed a full carb sync on it today. I was able to get the gauge ne edles to line up very nicely. While I had the carbs off for cleaning and r ebuild=2C I pulled the carb sockets off and they are like new=2C no indicat ions of leaks. > > I disconnected the fuel line where it goes into the engine fuel pump and checked for flow from the electric Facet I am using in lieu of gravity feed . There is a steady stream of fuel coming form the the line. I pulled the fuel lines at the carb and ran the Facet again and am getting lots out of the carb fittings too. > > Next=2C I disconnected the airbox from the carb and had my assistant run the engine up. I watched the carb slide and at 3800RPM=2C the slide was ab out two thirds to three quarters open. About where I think it should be at that power level. > > I'm starting to think this might be an ignition problem. All of the plug s are new and I gapped them when I installed them but I don't recall now wh at I gapped them to. I see in the maintenance manual it says to gap them t o 0.027 to 0.031. I'll have to check that tomorrow and see where they are at. > > I don't know guys=2C any suggestions? > > Doug MacDonald > CH-701=2C North Western Ontario=2C Canada > > > > > ========== ========== ========== ========== > > > _________________________________________________________________ The New Busy is not the too busy. Combine all your e-mail accounts with Hot mail. http://www.windowslive.com/campaign/thenewbusy?tile=multiaccount&ocid=P ID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_4 ________________________________ Message 2 _____________________________________ Time: 05:58:39 AM PST US From: Catz631@aol.com Subject: Re: RotaxEngines-List: Re: rough running at 3400 RPM and above Doug , Have you done a mag check? I had a rough runner and it showed up in the mag check. After much work,frustration,etc I called Ronnie Smith at South Mississippi Light Aircraft and he suggested I check the red power lead to the coils for a break. I used a sewing pin with an ohm meter and attached one lead to the pin (the other to ground). By penetrating the plastic shielding of the wire I worked my way back along the wire and sure enough I found the break along a flat run. It was totally invisible from looking at it. With a cut and splice, I was back in business. You could call Ronnie. He is very helpful and sure knows these engines! Dick Maddux 912 Ul Milton,Fl ________________________________ Message 3 _____________________________________ Time: 06:21:47 AM PST US From: Scott DeMeyer Subject: Re: RotaxEngines-List: Re: rough running at 3400 RPM and above I know this will sound silly but, do verify your spark plugs wires are goin g to the correct cylinders. When I purchased my KF, I had a similar problem and found that the guy I purchased from had swapped a couple of ignition w ires. Once I put them on the correct cylinders, problem went away. Download the Rotax heavy maintenance manual and compare with the schematics. Scott --- On Thu, 7/15/10, Catz631@aol.com wrote: From: Catz631@aol.com Subject: Re: RotaxEngines-List: Re: rough running at 3400 RPM and above =0A =0ADoug ,=0A-Have you done a mag check? I had a rough runner and it s howed up in the mag check. After much work,frustration,etc I called Ronnie Smith at South Mississippi Light Aircraft and he suggested I check the red power lead to the coils for a break. I used a sewing pin with an ohm meter and-attached one lead -to the pin (the other to ground). By penetrating the plastic shielding of the wire I worked my way back along the wire and sure enough I found the break along a flat run. It was totally invisible fr om looking at it. With a cut and splice, I was back in business.=0A-You c ould call Ronnie. He is very helpful and sure knows these engines!=0A-- ------------------------- ----------------- Dick Maddux=0A--- ------------------------- -----------------912 Ul=0A----- ------------------------- -------------- Milton,Fl- =0A=0A ________________________________ Message 4 _____________________________________ Time: 07:15:15 AM PST US From: "R&M Wis" Subject: RotaxEngines-List: Re: RotaxEngines-List Digest: 2 Msgs - 07/14/10 Doug, I have had this problem you describe. spraying carb cleaner into the jets and visually inspecting is not enough. You need to tale a small piece of stiff wire and work it around the jet orifice to get the "crust" to break loose. This happened to me and the "crust" was in the main jet of just one carb. I used the needle itself to break the crud loose but be careful not to bend it. Ray ----- Original Message ----- From: "RotaxEngines-List Digest Server" Sent: Thursday, July 15, 2010 1:58 AM Subject: RotaxEngines-List Digest: 2 Msgs - 07/14/10 > * > > ================================================= > Online Versions of Today's List Digest Archive > ================================================= > > Today's complete RotaxEngines-List Digest can also be found in either of > the > two Web Links listed below. The .html file includes the Digest formatted > in HTML for viewing with a web browser and features Hyperlinked Indexes > and Message Navigation. The .txt file includes the plain ASCII version > of the RotaxEngines-List Digest and can be viewed with a generic text > editor > such as Notepad or with a web browser. > > HTML Version: > > > http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 10-07-14&Archive=RotaxEngines > > Text Version: > > > http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 10-07-14&Archive=RotaxEngines > > > =============================================== > EMail Version of Today's List Digest Archive > =============================================== > > > ---------------------------------------------------------- > RotaxEngines-List Digest Archive > --- > Total Messages Posted Wed 07/14/10: 2 > ---------------------------------------------------------- > > > Today's Message Index: > ---------------------- > > 1. 07:14 PM - Re: rough running at 3400 RPM and above (MacDonald > Doug) > 2. 08:56 PM - Re: Re: rough running at 3400 RPM and above (E. D. > Eliot) > > > ________________________________ Message 1 > _____________________________________ > > > Time: 07:14:14 PM PST US > From: MacDonald Doug > Subject: RotaxEngines-List: Re: rough running at 3400 RPM and above > > > An update on my progress. I recieved the carb rebuild kits and have > installed > them. Tonight I ran the engine up and it runs a bit better but still not > right. > Now I am able to get it up to 3800 before it starts to miss and bog down. > Again, I am still able to get it up to over 4000 RPM by pulling on the > enrichener. > > I performed a full carb sync on it today. I was able to get the gauge > needles > to line up very nicely. While I had the carbs off for cleaning and > rebuild, I > pulled the carb sockets off and they are like new, no indications of > leaks. > > I disconnected the fuel line where it goes into the engine fuel pump and > checked > for flow from the electric Facet I am using in lieu of gravity feed. > There > is a steady stream of fuel coming form the the line. I pulled the fuel > lines > at the carb and ran the Facet again and am getting lots out of the carb > fittings > too. > > Next, I disconnected the airbox from the carb and had my assistant run the > engine > up. I watched the carb slide and at 3800RPM, the slide was about two > thirds > to three quarters open. About where I think it should be at that power > level. > > I'm starting to think this might be an ignition problem. All of the plugs > are > new and I gapped them when I installed them but I don't recall now what I > gapped > them to. I see in the maintenance manual it says to gap them to 0.027 to > 0.031. > I'll have to check that tomorrow and see where they are at. > > I don't know guys, any suggestions? > > Doug MacDonald > CH-701, North Western Ontario, Canada > > > ________________________________ Message 2 > _____________________________________ > > > Time: 08:56:48 PM PST US > From: "E. D. Eliot" > Subject: RE: RotaxEngines-List: Re: rough running at 3400 RPM and above > > > No experience with Rotax yet but did solve a few 'automobile engine > problem > s' by first checking the resistance of the high tension wires. Once=2C I > r > eplaced spark plugs and one of the 'new' ones was bad. God luck - > we=3Bll > all learn from watching your progress. > >> Date: Wed=2C 14 Jul 2010 19:12:19 -0700 >> From: dougsnash@yahoo.com >> Subject: RotaxEngines-List: Re: rough running at 3400 RPM and above >> To: rotaxengines-list@matronics.com >> > com> >> >> An update on my progress. I recieved the carb rebuild kits and have inst > alled them. Tonight I ran the engine up and it runs a bit better but > still > not right. Now I am able to get it up to 3800 before it starts to miss an > d bog down. Again=2C I am still able to get it up to over 4000 RPM by > pull > ing on the enrichener. >> >> I performed a full carb sync on it today. I was able to get the gauge ne > edles to line up very nicely. While I had the carbs off for cleaning and > r > ebuild=2C I pulled the carb sockets off and they are like new=2C no > indicat > ions of leaks. >> >> I disconnected the fuel line where it goes into the engine fuel pump and > checked for flow from the electric Facet I am using in lieu of gravity > feed > . There is a steady stream of fuel coming form the the line. I pulled > the > fuel lines at the carb and ran the Facet again and am getting lots out of > the carb fittings too. >> >> Next=2C I disconnected the airbox from the carb and had my assistant run > the engine up. I watched the carb slide and at 3800RPM=2C the slide was > ab > out two thirds to three quarters open. About where I think it should be > at > that power level. >> >> I'm starting to think this might be an ignition problem. All of the plug > s are new and I gapped them when I installed them but I don't recall now > wh > at I gapped them to. I see in the maintenance manual it says to gap them > t > o 0.027 to 0.031. I'll have to check that tomorrow and see where they are > at. >> >> I don't know guys=2C any suggestions? >> >> Doug MacDonald >> CH-701=2C North Western Ontario=2C Canada >> >> >> >> >> > ========== > ========== > ========== > ========== >> >> >> > > _________________________________________________________________ > The New Busy is not the too busy. Combine all your e-mail accounts with > Hot > mail. > http://www.windowslive.com/campaign/thenewbusy?tile=multiaccount&ocid=P > ID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_4 > > > ________________________________ Message 5 _____________________________________ Time: 07:26:55 AM PST US Subject: RotaxEngines-List: Re: rough running at 3400 RPM and above From: "rayw" Doug, I have had this problem you describe. Spraying carb cleaner into the jets and visually inspecting is not enough. You need to take a small piece of stiff wire and work it around the jet ofice to get the "crust" to break loose. This happened to me and the "crust" was in the main jet of just one carb. I actually used the needle from the jet and not a piece of wire. I was careful not to bend the needle. Ray Read this topic online here: http://forums.matronics.com/viewtopic.php?p=304896#304896 ________________________________ Message 6 _____________________________________ Time: 03:34:23 PM PST US From: "Geoff & Bin Bell" Subject: Re: RotaxEngines-List: Re: rough running at 3400 RPM and above Hi Doug, Have you tried a diferent Prop. I had the oppertunity to try some diferent props a few years ago, and each caused a diferent rough spot in the engine. Worth a go to eliminate that as the problem. 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