Rotax 582 Mikuni fuel pump bench testing and repair

[@swordfish1120]

Excellent vid. Breaking down the issue with the testing and identifying the problem with the disassembly was as clear as it gets. 👍🏼

[@RotacRepair]

Thank you for the kind comment. Happy flying!

[@kennethmays6830]

Great vid. Thank you for taking time to make this.

[@RotacRepair]

Glad you enjoyed it!

[@biconguy]

Clear as crystal! Many thanks!

[@josepeixoto3384]

Knowledge is power; thank you very much.

[@RotacRepair]

You are very welcome

[@gflyers7]

Thank you for another great learning video. Now if I can get my inverted 582 to run smoothly without a miss I would be a happy flier

[@RotacRepair]

You can do it!

[@suav6402]

Those small clear "Valve" diaphragm curve is convex. install the convex up.

[@RotacRepair]

Absolutely correct, thanks for the comment.

[@gflyers7]

I just checked to see about getting a rebuild kit for my pump (same as you did herein the video) and they don't sell them anymore at Leading Edge Airfoil company in Wisconsin.

[@RotacRepair]

I’ve got those pump kit’s in stock

[@gflyers7]

@@RotacRepair price to 45742. Thank you 🙏

[@MrHanowski]

Did you know that you are using the wrong screw driver? A regular philips works but doesn't fit well, and is apt to strip the screw heads. The proper driver is a JIS (Japanese Industrial Standard), identified by a punch mark on the screw head. The carburetors use another type of screw that also looks like a philips, but isn't. These are pozidriv heads, marked with cross dashes. Would be nice if a standard "philips looking" screw head was developed and used internationally to eliminate these special tools and associated problems (stripping heads).

[@JohnBaker-og4zp]

I reviewed the video and I believe I’m using a pozidriv screw driver. Your are very correct as the regular Philips is a very poor fit. Thank you for your comment, that’s good information.

[@MrHanowski]

The correct screwdriver for the pulse pump is a JIS (Japanese Industrial Standard), identified by a punch mark on the screw head. Not trying to be critical. I just learned about the difference in these screwdrivers myself so just wanted to pass it on. It certainly explains why I've have trouble over the years with Japanese screws on motorcycles and other stuff made in Japan. I really enjoy your videos . . . thank you!

[@RotacRepair]

I’ll be looking for a “JIS” tip and see if it fits better than my current choice. Good tip thanks again.

[@franciscojavierruizvidorre3749]

Great video! Have you ever tried a DF52-82 fuel pump on a rotax 582? I want to use it because it incorporates a pressure regulator that prevents flooding the carburetors.

[@RotacRepair]

No I haven’t, never found the opportunity to need one. I’ll definitely keep it in mind.

[@MrHanowski]

Excellent! Just what I was looking for. Where can I get the gauge and insertion tool like yours? Prior to watching, I thought the tiny hole in the pulse line was to "tattle tale" when the pump failed as indicated by fuel coming out. But as you said, it's also to drain accumulated oil that comes in through the pulse line. This explains the oily area under the pump on my 503. The pump on my 582 isn't mounted with the pin hole down. Maybe that's why I am not getting as much pressure from it. I have pressure gauges mounted on my aircraft to monitor fuel pressure. My 582 runs at only 2.5psi, 4.5psi with the inline electric pump on too. So I think a diagram is bad. Thanks for a great video! Also, what is your parts "wash" process?

[@JohnBaker-og4zp]

Thanks for your kind comments. I “washed” the pump using an ultrasonic cleaner

[@MrHanowski]

Can you recommend an ultrasonic cleaner that you like, including preferred cleaning solution?@@JohnBaker-og4zp

[@robertwalker2568]

Will you be talking about best way to mount fuel pump?

[@RotacRepair]

Yes I will, in a follow up video I’ll be posting shortly

[@robertwalker2568]

Vertical or horizontal, which is the best mount for the fuel pump?

[@RotacRepair]

I recommend mounting the fuel pump with the tiny pulse line drain hole facing down . The pulse line must be no longer than 20 inch's, however try to keep it as short as possible for the best pump operation

[@robertwalker2568]

I see a lot of fuel pumps vertical, why is that?

[@RotacRepair]

@@robertwalker2568 The Mikuni fuel pumps seen to operate fine when mounted vertically. Is that mounting correct? No it’s not correct because any acquired liquid inside the pump won’t drain out. The small drain hole is a safety feature required by Rotax.

[@stefanleibiczer1809]

Great video John, thank you.

[@RotacRepair]

Glad you enjoyed it

[@williamwhitley1174]

that is a really good pressure/vaccum gauge you are using. Can you give the maker and model? Where did you purchase it from? TNX Bill

[@RotacRepair]

I’m going to do a follow up fuel pump video shortly and I’ll include the testing kit.

[@bimmeraddict2001]

That was an awesome video, thank you for sharing.

[@RotacRepair]

Glad you enjoyed it!

[@jonathankennedytroya3755]

Super video, thank you!

[@RotacRepair]

You’re most welcome!

[@brucemcgimsie4544]

Wow, very interesting!

[@RotacRepair]

Glad you enjoyed it. The very best part of the attempted fuel pump overhaul is the engine wouldn’t start! Why? who know what else the owner’s servicing agent worked on. This “Challenger” is now being professionally inspected before its next flight.

[@dorianhevrin5823]

🌸 "Promosm"