---------------------------------------------------------- JabiruEngine-List Digest Archive --- Total Messages Posted Wed 03/25/15: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:05 AM - Re: Timing (James Clive) ________________________________ Message 1 _____________________________________ Time: 01:05:05 AM PST US From: James Clive Subject: Re: JabiruEngine-List: Timing Always a process of elimination, well done for getting there. Always difficult to know where to start! Induction can always be quickly checked by hand propping with carby off and your hand blocking the air. You would hear the missing gasket in this case as the air is sucked in any leak. So after a rebuild one to try before you put the carby on, or one to try if you suspect an induction leak. Regards, Clive > On 24 Mar 2015, at 22:30, BobbyPaulk@comcast.net wrote: > > List > Here is the latest in the timing drama on my 3300. > I installed new plugs and cranked the engine again. This time I was able to get it to run with the choke off. > I noticed that the EGT for #3, 4, & 5 was 800 to 900 degrees while #1, 2, & 6 were cold. After about a minute I got the RPM up to about 1100. > #6 came on line but #1 & 2 were still cold. With #6 on line I was able to coax the RPM up to about 1200 when #2 came in. > I determined then that I did not have a timing problem. When the throttle was brought back to 1100 #2 would quit cold again. > We grabbed a boroscope and started looking at the intake pipes and manifold. We found that the intake gasket on #1 had rotated on the outboard bolt about 30 degrees before it was tightened. That left a gap on both sides between the bolts of about 3/4" with part of the gasket in the pipe. That really messed up the manifold pressure and mixture. > After correcting this self induced problem the engine settled down to 750 RPM and was smooth as ever. > The Rotec E-Mag really makes a difference. It starts on the first blade when warm and not more than 2 or 3 when cold. > BTW - I modified my alternator to the Upgrade approved by Jabiru ( AVDALSR087-2 ) and I am getting 14.6 volts at 1300 RPM. Amp meter is always hunting but it got up to 4 amps so I think it will work better than original. I did not have to modify the Dynon tach display. > > > Bobby ( age 76 ) > Zodiac 601 XL "B" > Jabiru 3300 S/N 1141 > Sensenich 64" x 51" Prop > Bing Carb 260 Main & 290 Needle Jet > Status - Flying 236 hrs. > > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message jabiruengine-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/JabiruEngine-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/jabiruengine-list Browse Digests http://www.matronics.com/digest/jabiruengine-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.