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theoy

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Posts posted by theoy

  1. They should do that OK as it is only about half the equivalent life when used in an automative application. Aircraft application would require a more conservative approach, tho.. Since most Jabs run Avgas, what is the effect of the LEAD?. Since this builds up on the insulator, wouldn't this still be a problem with iridium point plugs? Resistor plugs are not a good idea with magneto's as the high resistance in the secondary coil circuit tends to cause point burning. ( I am aware that the Jab doesnt run points, but the principle still applies. A high resistance in the secondary circuit is likely to cause coil failure). Has anyone got the final word on that type (Resistor) of plug, for use in aircraft? Nev

    Hi Nev

     

    I haven't seen any significant lead build up to date or any significant wear on the electrode area. Probably right size jets or better burn with iridium or just good luck. I keep a good ear on any misfiring and a good look at the electrode end as well. My aim to change at 400 hour or sooner to a new set of iridium. I have heard of one auto engine on avgas with auto ignition wearing the electrode super fast around 100 hours. I understand that not the case with Jab low voltage Honda mags. Cheers

     

     

  2. Iridium 4 me

     

    320 hour now and I am aiming for 400 hour before changing them. I have a second set ready to go in when i notice any problems.

     

    For me running Iridium, to some degree was not the hours of use. My understanding with jabiru's low ignition voltage, the fine point Iridium gives a better spark, in turn better fuel burning, less carbon and small increase in power. < hope

     

    I wounder if a strong spark would help cold engine starts?

     

     

  3. below info not directly related to fouled s/p but it could be of some use.

     

    I have being using NGK Iridium spark plugs now for 300+ hours on avgas. I was told they give a better spark on a Jabiru J160 2.2L weak ignition system. I will try the 400 hour mark before changing or if i get cold feet sooner. I had to re adjust them back to .025. at 200 hours and again at 300 hours.

     

    The s/p were used during a short 100 hour period when the carby was set factory rich and glazed bores, using excessive oil piston ring bypass.

     

    Last 200 hours carby set on about 16L burn at about 3000 RPM below 5000 feet, 60X44 prop.

     

    Ring Wayne Johns to fix your problem. I have his mob.

     

    Cheers

     

     

  4. Bushman has it any thing to do with an extra ignition ? below one of your posting from April 09

     

    Cheers

     

    Theo

     

    Phil thanks for the carton LOL

     

    "Cold Start Jabby "

     

    " Hi Why not fit Auto ignition from four cylinder car Electronic have been using one for years three switches on full choke one or two turns and away, and if the battery is Flat hand cranking can be done so beware my Jabby Bites ?? once started turn off Third Ignition,:Flush::Flush: last Battery I replaces was stuffed could just start engine but still did

     

    The other morning at Bourke there was 1/2 inch of ice on the wings after overnight outside 3 clicks two turns and away she goes best system I have every used

     

    The Bushman "

     

     

  5. I use 15w50 winter and w100+ for summer, last time i spoke with Don from Jabiru he said 15w50 would be a good all year round oil for Jab engines with hydraulic lifters. Next summer i will properly will continue with 15w50.

     

     

    • Agree 1
  6. Lead for stems

     

    3 months ago i spoke with Don in Jabiru Engines about mogas and Jab engines. Mogas will shorten engine life, i think its to do with lead for valve stem lubrication. Best to ring Don. He also told me in Italy Avgas is $5/ L, I guess prices are on the move up 051_crying.gif.fe5d15edcc60afab3cc76b2638e7acf3.gif .

     

    Cheers

     

    Theo

     

     

  7. Hi Pete

     

    My Jabiru J160C with a 60x42 inch propeller burns about at 2800 rpm = 14L/hr, 2900 rpm = 15L/hr and it gets thirsty and costly at 3000 rpm = about 18L/hr. IAS ranges 100 - 110 knots depends on all up weight, most times I cruise at 105 knots.

     

    cheers

     

    Theo

     

     

  8. HI Captain

     

    I like the idea of a 4x2 X 1/2 m aluminum instead of wood and maybe have the long piece lever folding into one or maybe use 1x1inch aluminum I haven't used it on a flat tyre, I don't see a problem as all you need is a gap under the leg of about 2 inch. The 4x2 is a one man show, try it. Iam definitely up grading to a cool looking aluminum set.

     

    Cheers

     

    Theo

     

     

  9. good brakes ?

     

    Me to I am light on the brakes on most landing. I have had a few experience long ago still etched in my mind like yesterday, I'm glad the Jab brakes are not mega affective and are forgiving. ;)

     

    Cheers

     

    Theo

     

     

  10. Timber Jack

     

    I have tried the car jack method, a bit tricky, it works OK. I'm not keen lifting my wet wings so now we use the good old fashion wood lifting method,yes just 3 pieces of wood I use a 4X2 timber about 1/2 M long place one end under the wheel leg. Next jam a wide piece of wood about 4 inches back from the wheels leg under the 4x2. Lever the 4x2 other end down, just lean on it, lifting the wheel up jam more wood under the leg to keep it up. At all times making sure the wheel and disk brake spin free. The good old fashion wood lifting method most times works well but can get hairy on soft ground. LOL

     

    cheers

     

    Theo

     

     

  11. Hi Ian next time just after you have landed, have a look on the bottom outside of the carby see if it is wet. It might be flooding. It could be the needle & seat , carby floats or electric boost pump . I had a similar problem with my Jabiru 2.2L.

     

    Cheers

     

    Theo

     

     

  12. Ian gimmick or not that one way looking at it. I don'tthink you would have a problem inspecting top down with cowl removed the engine's underside with a good light source and a telescopic mirroror having a hard look up the bottom cowl hole with torch.Cheers

     

     

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