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  1. C

    "new" Mikuni fuel pump plumbing

    I've been having trouble with the Rotax 447 on my Firefly not wanting to idle below about 2400 rpm and I also have to directly inject fuel into the carb to get it started, which was not the case previously. So, I bought a new Mikuni from Spruce and it arrived... with 3 ports instead of the 2 on...
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    Information on Herb Gayheart or Danny Day

    Does anyone happen to know of/about one Herb Gayheart or a Rotax rebuilder named Danny Day? Especially any contact info for either of them. I believe Herb is the builder of my Firefly (but I'm not at all certain, the seller didn't have any contact info or even a name!). This is just judging...
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    Rotax 447 rough idle

    I am, it would seem, the creator of all of my own problems. This will be another long post so again, I beg you to bear with me. A few weeks ago, when I was having all of the problems with my Rotax 447 ignition module and was unable to get the engine started, I began to worry about the...
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    Ducati Ignition Module Woes

    This is a long post but please bear with me. Does anyone know, exactly, what is inside the Ducati ignition module used on a Rotax 447 engine? More specifically, I want to know how to kill one. The reason for this is that I have two that are dead, one of which was new and never even run but...
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    Wanted - Rotax SCDI Ignition Module (PN 996467)

    I'm looking for a (preferably new) Ducati SCDI Ignition Module for my 447. For that fact, a source for one, preferably one that doesn't think I'm rich! I've seen them on ebay for around $250 (supposedly new) and new from LEAF for around $350. Also, does anyone know anything about the...
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    Rotax 447 Ignition/kill switch Specs?

    I have a Kolb Firefly that currently has no spark. Pulling the ignition switch out, it literally came apart in my hands, so I'm hoping that's the cause of the problem. The switch that was in the airplane said "0.4 VA MAX" on the side, which, if I'm reading it correctly, seems a bit light...
  7. C

    Firefly with Cheng Shin Tires - Pressure Recommendation?

    I have a Kolb Firefly (SN 0042) that has Cheng Shin C179N-2 4.00 x 6, 2 ply tires on it. Does anyone have a recommendation for what the tire pressures should be? They currently have 9 & 6, and feel properly spongy, so I'm guessing around 10 psi but I have no idea if that's a reasonable guess...
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