---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Mon 03/18/19: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:21 AM - Re: Carb swap, manifold pressure oddness (Walter Lannon) 2. 12:03 PM - Re: Carb swap, manifold pressure oddness (Jon Boede) 3. 12:23 PM - Re: Carb swap, manifold pressure oddness (Richard Goode) 4. 06:50 PM - Sales question. (\) ________________________________ Message 1 _____________________________________ Time: 11:21:38 AM PST US From: "Walter Lannon" Subject: Re: Yak-List: Carb swap, manifold pressure oddness Hi Jon; If you have installed intake drains without re-inforcing the thin wall tubing at the drain boss there is a possibility of crack development around the boss. I do not know if this is the problem but it certainly is a candidate. Check it out. Walt -----Original Message----- From: Jon Boede Sent: Sunday, March 17, 2019 6:01 PM Subject: Yak-List: Carb swap, manifold pressure oddness Finally got my stock CJ flying after having swapped the carb. Runs great, makes lots of power... but... The manifold pressure goes UP at full power but never seems to drop down below ambient when the throttle is pulled back. Drops to maybe 700 at 1,000 RPM, a little lower in the back seat, so its not the gauge. I didnt mess with the manifold pressure line. Seems to run quite smoothly from idle to full power with good control, no popping. If it was sucking air I would think it would run super lean and miss. Ideas? The carb was new from Doug and I de-preserved it properly (I think, hope). Jon --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 2 _____________________________________ Time: 12:03:58 PM PST US From: Jon Boede Subject: Re: Yak-List: Carb swap, manifold pressure oddness Ha! I messed with one of my intake drain sumps as well as one of the intake tubes when swapping the carb. That may be it! > On Mar 18, 2019, at 1:28 PM, Walter Lannon wrote: > > > Hi Jon; > > If you have installed intake drains without re-inforcing the thin wall tubing at the drain boss there is a possibility of crack development around the boss. > > I do not know if this is the problem but it certainly is a candidate. Check it out. > > Walt > > -----Original Message----- From: Jon Boede > Sent: Sunday, March 17, 2019 6:01 PM > To: yak-list@matronics.com > Subject: Yak-List: Carb swap, manifold pressure oddness > > > Finally got my stock CJ flying after having swapped the carb. > > Runs great, makes lots of power... but... > > The manifold pressure goes UP at full power but never seems to drop down below ambient when the throttle is pulled back. Drops to maybe 700 at 1,000 RPM, a little lower in the back seat, so its not the gauge. > > I didnt mess with the manifold pressure line. Seems to run quite smoothly from idle to full power with good control, no popping. If it was sucking air I would think it would run super lean and miss. > > Ideas? The carb was new from Doug and I de-preserved it properly (I think, hope). > > Jon > > > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > > > ________________________________ Message 3 _____________________________________ Time: 12:23:02 PM PST US From: "Richard Goode" Subject: RE: Yak-List: Carb swap, manifold pressure oddness With the M 14 P engine we have seen many engines where people have installed manifold oil drain systems, but use the original very thin drain plug which is clearly not designed to be drilled and tapped to put a fitting into it, and after a while they will tend to crack! The solution is a much thicker plug which is designed to be drilled and tapped, and is a long-term solution. We, and quite likely others, make them. Richard RICHARD GOODE AEROBATICS Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129 e-mail: richard.goode@russianaeros.com www.russianaeros.com WORLD LEADERS IN RUSSIAN SPORTING AIRCRAFT & ENGINES In partnership with Aerometal Kft, Hungary. -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Walter Lannon Sent: 18 March 2019 18:20 Subject: Re: Yak-List: Carb swap, manifold pressure oddness Hi Jon; If you have installed intake drains without re-inforcing the thin wall tubing at the drain boss there is a possibility of crack development around the boss. I do not know if this is the problem but it certainly is a candidate. Check it out. Walt -----Original Message----- From: Jon Boede Sent: Sunday, March 17, 2019 6:01 PM Subject: Yak-List: Carb swap, manifold pressure oddness Finally got my stock CJ flying after having swapped the carb. Runs great, makes lots of power... but... The manifold pressure goes UP at full power but never seems to drop down below ambient when the throttle is pulled back. Drops to maybe 700 at 1,000 RPM, a little lower in the back seat, so its not the gauge. I didnt mess with the manifold pressure line. Seems to run quite smoothly from idle to full power with good control, no popping. If it was sucking air I would think it would run super lean and miss. Ideas? The carb was new from Doug and I de-preserved it properly (I think, hope). Jon --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 4 _____________________________________ Time: 06:50:38 PM PST US From: "\"" Subject: Yak-List: Sales question. Guys / gals, I need some info on the sale price of any M14p powered CJ-6 sold lately. 1.=C2- N number2. total time airframe3 total time engine since OH or new4 .Long range tanks?5.Paint ?6. Prop?=C2- 2 or 3 blades?7. Sale price=C2- This info is for a lender.=C2- Please send off list. Jim "Pappy" Goolsby ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/yak-list Browse Digests http://www.matronics.com/digest/yak-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.