---------------------------------------------------------- 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. 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