Kitfox engine problems | Rotax 582 

Glad you noticed the problem on the ground and not in the air and have an engine out. :)

Good luck getting it fixed. Aviation can be frustrating. 😂 Trying to get the flying triangle of wind, visibility and plane serviceability to line up. There's always one thing missing! I think this one is the worst though when the plane doesn't function on a day of perfect conditions!

I fly a 582 Blue head. Just had the carbs apart last night for all new rubbers / needles / new main jet. I set the mixture screw to two turns out. To set the idle RPM. I was told to use a 7mm drill bit (google this and you'll see what I mean), then balance them, ensure both throttles open together. After running the engine today, it's more 7.2mm ish for mine. Idle seems to be around 1900/2000. There's two rubber blanks on the left side of each carb. Make sure they're not cracked and leaking. Also, check your ignition leads aren't chaffed and possible leaking spark.

Hi I fly a Rans S6 with the blue top 582, I recently (last month) had the very same symptoms, so i decided to go over eveything fuel related, i cleaned the fuel tap ( which I'm glad i did as there was so much sandy crud in it) i fitted a fuel filter ( not paper one) between the gascolator and fuel pump , refurb kit for the fuel pump (around £10 easy job) but still had rough engine, so stripped and cleaned carbs and jets etc turned out that the shut off valve on one carb wasn't shutting off as the float rises as the oil had jellified and clogged it up. All cleaned re-fitted and balanced now, she fires up first time and purrs very sweetly, Hope this helps and you sought your issue.

I would for sure fix the primer, and if that doesn't solve it, pull the idle jets out of the carb and clean them. They have very small holes in them, and can plug easily with a bit of dirt. Actually, I was thinking idle jets until you mentioned the primer leaking. If you drop the float bowls, you should be able to unscrew the idle jets without taking the carbs off.

Those primers are notorius for leaking. Engine will run rough as it is to rich. In the field once i bent the red primer line like you would to shut off your garden hose and zip tied it to keep it closed. The restarted engine and it ran normal. When i reinstalled new primer i put small shutoff valve between primer and engine so if it happened again and it did i could shut it off even why airborn.

It audibly sounds like carb ice, you have carb heat on that bird? (The weather also looks about right for carb icing on ground). Rough running when at idle or low RPM suggests it might be running too lean perhaps caused by that fuel leak.

Hi Rob Whats going on with your kitfox? no update since you did video on the engine problems.

It sounds like a blocked pilot jet in one of the carbs. Once off the pilot circuit it appears to be working ok.

check float levels. Check float condition.

I have the same problem with my 503 on my Himax.. but sometimes its good.. sometimes its running fine on 2200ish RPM and sometimes it runs smooth only above 3000. Cant figure it what is it, I will try to clean my carburetor and put in new jets. Hope it will help.

Do you run it on E10 Rob, or E5 or maybe Avgas. E10 is very corrosive and will disolve fuel lines, gaskets, tank linings floats if they havent been changed out to be ethanol resistant ones. E5 should be ok as its only 2-3% ethanol. I have literally seen people with £60k worth of foxbats at out airfield grumbling over the cost of E5 and using E10, then complaining about their floats disolving, but still sticking with E10. 🤷‍♂ It does cause issues with your fuel system though is the main point. Best of luck.

Hey, question when twisting the throttle lever, what does that actually do? I'm not a pilot by any means only play flight sims but it really don't know what it does

Did you solve this problem dude? I have the same problem with my r582 and I can't find solution already three month.

Anything new on your engine?

I think it could be your carburetors

Hi Rob, thanks for sharing, I had a similar issue which turned out to be one cylinder running rich, long story short , fix it by carb ballance and needle circlip moved one notch on lean carb (higher egt), heres a video of the test flight post adjustment, I'd be interested to see what egt and water temps your 582 runs at. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-dXVJglxnQFE.html

I've made an update video for everyone here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-BhT8vdEXXvk.html

Stator problem.