How To Maintain Rotax Engines - 100HR Inspection

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One of the most important aspect of owning your own aircraft is maintenance. As a pilot and aircraft owner, you have to stay on top of the airworthiness status of your plane. For different airplanes, there are different things that needs to be maintained and kept up to date, but for the most part, you have a standard checklist for the airplane annual and or 100 hours inspection.
First and foremost is your engine. And today in this video we are referencing the Rotax 912 engine. Most piston engines including the Rotax 912 have a overhaul of 2000 - 2500 hours. You change the oil in the Rotax every 25-50 hours depending on the grade of fuel you’re using.
Great thing about Rotax engines is that you can use Mogas (car gas) to run them, and you’ll save money not only on fuel cost but also on your oil change. It just so happens that car gas leaves less led deposits which means you can run the oil for up to 50 hours before changing your oil and filter. If you’re using 100 LL which is the standard fuel for most piston engine aircraft, then you change the oil every 25 hours.
More maintenance checks need to be done. Watch the video for full details.
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[@MrWATCHthisWAY]

Great informative video Mojo! I love this aircraft. In my mind it is one of the best LSA aircraft a pilot can build and fly for the price offered. It has proven itself for quite sometime now and the bugs have been worked out of the original design. One of your best videos! Can’t wait to see you finish your aircraft and see her fly. Be safe and have some fun!! We are there with you in spirt Sir!!

[@TheGreatDrAsian]

Interesting they actually cut open the oil filter to inspect it! That's a neat step that could be used for basic car maintenance too. I love informational videos like this, keep up the great work bro!

[@simeon2851]

Its something am doing moving forward for my car.

[@toadman506]

It's been standard practice in Aviation for years now, one additional thing that is becoming common in the last few years, and is considered even more important than examining the Filter Element, is Oil Analysis, costs around $12-$15 per oil change and can detect wear before chunks start coming off to be caught in the Screen or Filter element.

[@chubrikzhopa4881]

That's what every dirtbike or atv also gets you see if the crank is eating the washers

[@ChrisPhair]

Thanks - very interesting to see what needs to be done. He makes it sound easy but most professionals do make things look easy.

[@nickbayer7847]

Sweet video, likin' all the details Jean dished out 👌👌

[@kevinbutler9786]

Dang Mike, I've been at the hangar every time you've filmed and haven't made it in one yet. Maybe I'll get into a build vid. Also, it's weird seeing Jean go 5 minutes without telling an awful joke. Well done.

[@alejandrosienra2179]

Excellent moi!🌠🛩️

[@albertcoia184]

This is a really good video! Very helpful!

[@ForFunFlyer]

Nice video, very informational! 👍🏻

[@skyrangerswift2ireland]

Those plug caps wear away. I've replaced a few and handed out many to guys at my airfield. The threaded spark plug end, eats away at the rod inside the cap. Check that they are not worn or pull away easily. You did say it in your video, its a common thing over looked! Great video by the way! Thank you.

[@martinpotgieter5687]

Thanks that was very informative - will be great to hear back from you on your own Tsi now that is its in service and what the actual running costs are in your own experience - happy flying!!

[@PilotageChannel]

What a beautiful aircraft

[@twistedhippie7608]

This one will get a lot of views!

[@briand4000]

Let us not forget the lovely five year rubber replacement. I'm doing that now on my Sportstar and it sux! But, has to be done. AND...a new fuel pump AND carb diaphragms AND maybe engine mount rubbers...AND....so...just be prepared for the stuff that can jump out at you at certain milestones of hours OR time.

[@flexairz]

With mogas you can run the Rotax up to 100 hours or annually before an oil change, not 50. 50 hours when running on avgas. The 25 hour check and oil change occurs only the first time. See the maintenance manual for more details.

[@glider1232]

The flight school might run on more conservative standards than factory recommended intervals.

[@rpc938]

200 hour engine. We replaced exhaust header springs , voltage regulator, fuel pressure sensing unit, and the surprisingly problematic Carburettor Floats that sink in gasoline !

[@Forty5Kimber]

There is a good reason why pilots use checklist! Be safe!

[@DarrylZubot]

Sadly my 912iS had problems at 1700hrs. The thrust washer failed on the gear box. Found plastic and metal in the oil tank. A common 912iS problem on the older ones. It was not a serviceable part in the past even on the 1000hr gear box overhaul, was not required to be replaced, as of Jan 2023 this part is now required to be replaced at the gear box overhaul 1000hr. I’ve been told rotax changed engine design so there is a hole in the shaft that sprays oil on the thrust washer parts to lubricate, on earlier engines this was not there. The oil filter and magnetic plug were completely clean. This is due to the washer failing inside the engine and going through to the crankcase where it gets sucked back to the oil tank and the metal lining protects it from going back through oil system. I had drop in oil pressure and rise in oil temp as the debris probably clogged up the oil return line. Hydraulic prop was also lurching, trying to maintain rpm but not getting proper oil flow due to blockage.

[@ricardofranco9946]

Great super video, it finish miths that always believe like the engine it's do sofisticate than nobody can maintain it. More simple more advance more advance more efficient. I imagine e that the cist of the engine is higher than a car's, because the production demand, but if every body knows about the reliable of this engines and their simplicity, tuned cars used it, that's for sure. Know I know why in 50 and 60 some cars, Chevrolet and other brands used plane engines. Thanks for this video, maybe you can made one in the Rotax plant and describe the models and prices , and more detailed explanation of the transmission.

[@scottstolnitz8918]

I have always said, "Maintenance is the key to life".....

[@rjbishop12]

No mention of the cylinder head coolant path inspection? That's just as critical as oil and fuel! Thanks for the video in any event.

[@larz46north18]

good point. avsport.org/avsport.org › acft › Rotax › rotax_periodic_inspection_checklist ..... pdf 50 hour inspection.

[@MuhammadIqbal-ng9nc]

❤❤❤❤❤

[@faraskhan3940]

Can I put an upgraded Rotax that has been upgraded to say 160 from Edge on a Sling?

[@sandcrabronco]

I wonder what happens to the engines after 2000 hours, that would be a sweet engine for a small dune buggy or side by side. I imagine they are fully torn down and rebuilt...

[@1compaqedr8]

An engine monitor should be standard equipment for pilots.

[@DanFrederiksen]

The engine block is a tiny bit of it. With direct injection, no gearbox and tight intake and exhaust manifolds, the engine could be tiny.

[@Amertrade97421a]

I missed the coolant system inspection...

[@AsH-fp3fx]

How much an average annual or 100hr cost?

[@idrissali5125]

Rotax 912 is sprot give etpu failure. What is etpu ?

[@chrism9976]

Looks like a lot of corrosion on that left exhaust pipe. Can they be cermaic coated?

[@Wingnut353]

Pointless if its going to be chucked at 2000 hours...

[@tropicthndr]

Roller bearing engines are very unreliable and very vulnerable to any dirt in the oil. But they make great drone engines.

[@antoniog9814]

3:44 So that engine has to be replaced every 2000 hrs?

[@mojogrip]

Yea that's the overhaul time suggested by Rotax

[@antoniog9814]

@@mojogrip Ok, Jean should've said overhaul. Replace implies it outlived its purpose.

[@andrewlynch17]

It doesn't HAVE to be replaced, unless you are flying as part of a Part 135 operation. Most private pilots can fly it past 2000 hours if the engine is still healthy. 2000 hours is the manufacturer suggested time

[@Fjord_Driver]

That's 33 years of flying with proper maintenance! The average private pilot only flies about 60 hours per year. Are you going to keep the plane 33 years?

[@joshplum1924]

Too many commercials in my opinion.

[@OscarDad]

gotta pay the bills,, building content takes time & money

[@calvinsatrom2475]

I got the first like

[@PIERREGERARD-zc2iq]

SUCH BLABLABLA

[@enigma6482]

Wait, you replace the entire engine at 2,000? I thought you just overhauled them at 2,000 hours?

[@mojogrip]

Overhaul is pretty much like buying a new engine