---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Wed 06/17/09: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:53 AM - Carb flooding (flynno) 2. 01:51 PM - Re: Carb flooding (Thilo Kind) 3. 02:59 PM - Re: Carb flooding (K BURNS) ________________________________ Message 1 _____________________________________ Time: 09:53:25 AM PST US From: "flynno" Subject: RotaxEngines-List: Carb flooding Hi all, a friend of mine has just finished his 912s powered Savana build and has been running up the motor. Starts on the button and super smooth, however after six or seven minutes of taxi up and down the air strip the port side carb overflows and the motor runs very rough. We shut down right away and the float bowl is totally full, indicating a needle and seat problem, when we pressurise the carbs engine off-fuel pump on then check float level all is normal .Seems this carb will only overflow when the motor is running. Both carbs have just come back from the Rotax agent after being checked over , re installed today but the same problem persist. Any idea's please. Flynn South Africa ________________________________ Message 2 _____________________________________ Time: 01:51:38 PM PST US From: "Thilo Kind" Subject: RE: RotaxEngines-List: Carb flooding Hi Flynn, Could it be a blockage of the carb overflow tube? The overflow tubes of both carbs need to see the same pressure, otherwise flooding will occur. If you extend the overflow tubes, the pressure will vary. Good luck Thilo _____ From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of flynno Sent: Wednesday, June 17, 2009 18:40 Subject: RotaxEngines-List: Carb flooding Hi all, a friend of mine has just finished his 912s powered Savana build and has been running up the motor. Starts on the button and super smooth, however after six or seven minutes of taxi up and down the air strip the port side carb overflows and the motor runs very rough. We shut down right away and the float bowl is totally full, indicating a needle and seat problem, when we pressurise the carbs engine off-fuel pump on then check float level all is normal .Seems this carb will only overflow when the motor is running. Both carbs have just come back from the Rotax agent after being checked over , re installed today but the same problem persist. Any idea's please. Flynn South Africa 17:55:00 ________________________________ Message 3 _____________________________________ Time: 02:59:43 PM PST US From: K BURNS Subject: Re: RotaxEngines-List: Carb flooding Flynn,=0A=0AI have seen this problem caused by a sliver of rubber cut from inside the rubber fuel hose blocking the float needle from seating, carb ma y be cleaned then checked on the bench then a sharp edge downstream of filt er can send a slver in to the float bowl, other problems may be caused by g ell from automotive fuels evaporating in the carb.=0A=0AKevin=0A=0A=0A=0A =0A________________________________=0AFrom: Thilo Kind =0ATo: rotaxengines-list@matronics.com=0ASent: Wednesday, 17 June, 2009 9:5 0:41 PM=0ASubject: RE: RotaxEngines-List: Carb flooding=0A=0A=0AHi Flynn, =0A-=0ACould it be a blockage of the carb overflow tube? The overflow tub es of both carbs need to see the same pressure, otherwise flooding will occ ur. If you extend the overflow tubes, the pressure will vary.=0A-=0AGood luck=0A-=0AThilo=0A-=0A=0A________________________________=0A=0AFrom:ow ner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list- server@matronics.com] On Behalf Of flynno=0ASent: Wednesday, June 17, 2009 18:40=0ATo: rotaxengines-list@matronics.com=0ASubject: RotaxEngines-List: C arb flooding=0A-=0AHi all, a friend of mine has just finished his 912s po wered Savana build-and has been running up the motor. Starts on the butto n and super smooth, however after six or seven minutes of taxi up and down the air strip the port side carb overflows and the motor runs very rough. =0AWe shut down right away and the float bowl is totally full, indicating a needle and seat problem, when we pressurise the carbs engine off-fuel pump on then check float level all is normal .Seems this carb will only overflo w when the motor is running.=0ABoth carbs have just come back from the Rota x agent after being checked over , re installed today but the same problem persist.=0AAny idea's please.=0AFlynn=0ASouth Africa=0A -=0A -=0Ahttp:/ /www.matronics.com/Navigator?RotaxEngines-List=0Ahttp://forums.matronics.co m=0Ahttp://www.matronics.com/contribution=0A -No virus found in this inco ming message. 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