Hi, Looks like this time the problem was with the carbs. I had them thoroughly cleaned and the motor came to life.
Regards Jarek On Wed, 16 Oct 2019 at 10:16, Ian Mc Phee <[email protected]> wrote: > Ian and Jarek > > I have done services around 300hrs then 600ht (I have dual ignition) then > 900hrs but I have always had an issue hard to start. > > This last one I chose AIES at Moorabbin (been to two other place before) > and each time starting was difficult. I mentioned to guyy at AIES and he > rang and said I think I found your trouble. It is impulse but on two > previous services I do not think the guys really looked at impulse. They > did points and capicator and if needed the small wheel and seal (mor a > thing for falke as impulse is oiled by engine) > > I now oil the mag impulse each oil change (usually 35 to 40hrs. > > The reason I went to AIES was a friend a LAME recommended him as he is > specialist. Some of the other workshops just do magneto s as a sideline to > general service. I could mention another Lame organisation that buggered up > a slick in a Pawnee and eventually gears failed and showed metal. > > Thus I say find a good expert to do your magneto. > > For those earlier models with the master switch (bone) forward of firewall > they can be mounted behind firewall on standouts. The rod gets shortened > and thus more room behind firewall. A good mod if you have engine out as > makes life easier. > > I hear from a friend with L2000 in a g109 new engine and has long reach > plugs so finally Limbach have realised these heads are much better. > > Ian McPhee > 0428847642 > Box 657 Byron Bay NSW 2481 Australia > > > On Tue, 15 Oct. 2019, 20:59 Jarek Steliga, <[email protected]> wrote: > >> Ian, >> >> Thank you so much for the very exhaustive reply. Even I am able to grasp >> the logic behind your suggestion no 2. The stuck impulse coupling would >> keep retarding/delaying the ignition from the required minus 30 all the way >> to zero obviously fouling the higher revs. I am going to look into this >> immediately. >> >> Best regards >> Jarek >> >> >> >> On Mon, 14 Oct 2019 at 23:47, Ian Williams <[email protected]> wrote: >> >>> Hi Jarek, >>> >>> I hope to be of some help to you based in issues I have had in the past >>> with Limbach 2L engines. >>> >>> They are a great little engine and if looked after will perform well for >>> years. I currently “look after” ie the engineer for 3 aircraft wit hL200’s >>> and one with an L2400. >>> >>> 1. Here in New Zealand we need to remove the Magneto every 2 years >>> or 250hrs … which ever comes first and any issues with the magneto are >>> found (usually) However sometimes not the case. The L2000 on our >>> Dimona >>> was ex Thai air force and the engine was not used for 20 or so years. It >>> did around 150 hrs of trouble free running then without warning, the >>> condenser in the Magneto broke down. Fortunately just after take off so >>> a >>> return landing was possible. Interestingly, it broke down less than 1 >>> hr’s >>> running AFTER a bench check. … so a problem COULD be a faulty condenser >>> … >>> though if that was the case the engine wouldn’t idle either. >>> 2. What is possible (and has happened to me) is an issue with the >>> impulse spring … The impulse used is a standard GA one. Usually they >>> are internal of the engine (ie Lycoming etc) hence well oiled. The >>> Limbach >>> one is external and hence needs external lubrication. There is a little >>> oil pot on top of the rear case to do that but is really quite hit and >>> miss. We had a problem (which fits to your situation) where the spring >>> was quite “dry” and would not release. … ie “bound up” Hence the engine >>> would run OK at low RPM’s but no good at high. The fix was to take the >>> magneto out (again) dismantle the impulse, give it a good clean and >>> lubrication and reassemble .. then back on the Aircraft. The problem was >>> solved. >>> >>> Just a point re advance and retard … Not a lot of point in that >>> automatically adjusting with an engine that runs at a fairly constant RPM … >>> the KISS principal here. >>> >>> However the old De Havilland Gypsy engine had a mechanical system which >>> moved the magneto physically when the throttle was closed … for a better >>> idle. A friend of mine put an adjusting ignition(ie replaced one magneto) >>> system on his 150hl lycoming The idle was significantly smoother. >>> >>> >>> >>> So I think your problem is no 2 >>> >>> >>> >>> Best regards >>> >>> Ian Williams >>> >>> Drury >>> >>> Auckland >>> >>> New Zealand >>> >>> >>> >>> ZK-GCB (Dimona) >>> >>> ZK-GOC (Grob 109 with a 2400 Limbach) >>> >>> ZK-GNW (Grob 109 2000 Limbach >>> >>> Working on another Dimona … to be ZK-GCD (ex VH-GNW) >>> >>> >>> >>> >>> >>> *From:* [email protected] *On Behalf Of *Jarek Steliga >>> *Sent:* Monday, 14 October 2019 8:40 p.m. >>> *To:* [email protected] >>> *Subject:* Re: [DOG mailing list] ignition advancement not affected by >>> the RPMs >>> >>> >>> >>> Ric, Ian, >>> >>> >>> >>> Thank you very much. The idea of there being no advance seems bizarre >>> for someone having only to do with 'terrestrial' engines :-) >>> >>> >>> >>> On Mon, 14 Oct 2019 at 08:07, Ric Sutton <[email protected]> >>> wrote: >>> >>> Hi jarek >>> >>> Yep you are correct, there is no advance. It stays the same throughout >>> the rev range. >>> >>> >>> >>> *From:* [email protected] [mailto:[email protected]] *On >>> Behalf Of *Jarek Steliga >>> *Sent:* Sunday, 13 October 2019 5:17 PM >>> *To:* [email protected] >>> *Subject:* [DOG mailing list] ignition advancement not affected by the >>> RPMs >>> >>> >>> >>> >>> >>> >>> >>> Hello, >>> >>> >>> >>> Can someone please confirm that once my L2000 starts with a 43 series >>> Slick magneto mounted, the ignition advancement will stay the same (30%) >>> throughout the whole RPMs range? In other words as I understand in this >>> system there is no spark advance mechanism installed apart from the impulse >>> coupling which only affects (delays/retards) the spark timing up until 400 >>> RPMs (i.e. well before the engine kicks in). >>> >>> >>> >>> >>> >>> Thank you in anticipation >>> >>> >>> >>> Jarek >>> >>> >>> >>> >>> >>>
