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gogogo888

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About gogogo888

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  1. You are 100% correct and I completely agree, so I follow the most updated scientific fact on the Rotax's maintenance manual(Jan 2020) and change oil at 100 hour interval and spark plugs at 200 hour interval. I’m not saying to change oil every 28 years. I’m saying to follow the latest and greatest scientific fact on the Rotax maintenance manual. Please share any links or report that says otherwise.
  2. Thanks for everyone that have contributed to this discussion. This is what I've learned. A lot of the recommendations(ex. 50 hr oil change(auto gas), 100 hr spark plug change(auto gas)) are based on personal preference, anecdotal evidence and what was taught by other people. Which is valid and it makes you feel better about your airplane not falling out of the sky. On the other hand, the real scientific fact and engineering data comes from Rotax's own maintenance manual, which calls for 100 hr oil change(auto gas), 50 hr oil change (100LL) and 200 hr spark plug change(auto gas) 100 hr spark plug change(100LL) If it makes you feel better to change oil at 50 hr(auto gas), feel free to do it, but understand that, there is no real scientific fact behind it, it is all based on anecdotal evidence. If you want to protect yourself and your mechanic from law suit, feel free to follow the scientific fact on the Rotax maintenance manual and change your oil at 100 hr(auto), 50 hr(100LL). Also understand that, doing all the extra maintenance does not protect you from engine failure, as Roger himself have had engine failure before, all those extra effort he puts in does not prevent the engine from failing. Isnt the whole point of preventative maintenance is to prevent the engine from failing? If doing extra maintenance does not prevent the engine from failing but increase the chances of maintenance induced accident. Why do it? So, my personal conclusion is, if it makes me feel better, I will change oil at 50 hours(auto gas). If I want to follow scientific fact and also protect myself and my mechanic from lawsuit, I will follow what the Rotax maintenance manual says and change my oil at 100 hours(auto gas).
  3. I took the plugs off to do a borescope few days ago, was thinking about replacing them because of what Tom said. I will keep them in the engine until they are timed out. This just show how much confusions are out there: Assuming the plane uses auto gas 100% 1) - Rotax says to take the plugs out to clean them at 100 hours and put them back in and replace them at 200 hours. (People in here says to replace them at 100 hour, if you take them out before 100 hr, replace them because the gasket won’t fit. Rotax never said this) 2) - Rotax says to change oil every 100 hour (People in here says to change it at 50 hours, Rotax never said this) 3) - Rotax says cruising at 4,300 RPM is completely ok. (People in here says cruising at 4,300 RPM will damage the crankshaft, you must cruise at 5,000 RPM, again, Rotax never said this) 4) - People says, if we don’t follow the Rotax maintenance manual and engine shut down mid flight, you won’t get reimbursed from Rotax. But according to the last 3 points, we are NOT following the maintenance manual. Even worst, the previous owner of my plane follow all the recommendations and have spent tens of thousands of dollar doing all these maintenance and STILL had an mid air engine failure and they were NOT reimbursed for the engine.
  4. The following was what I wrote on the original post. So, the answer is YES! The most important maintenance we should do for our Rotax 912 engine is 50 hour oil change, 100 hour spark plug replacement, annual inspection and the 1000 hour gear box inspection(Kerry in Lockwood is the expert, he does nothing but gearboxes 40 hours a week)
  5. You sum it up much much better than I can. In addition to Mike Busch. Professor Shuch in AVSport is another specialist with the Rotax 912 engine, he is a CFII and LSRM who just received a FAA Master Mechanic Award for 50 years of service to aviation safety. Professor Shuch also says less maintenance is more. In his website he wrote: (10) Acknowledgment: Much of what I know about condition inspections I learned from Mike Busch, A&P/AI, founder and CEO of Savvy Aviation Inc.. I have incorporated many of Mike's recommendations into AvSport's maintenance policies. I am grateful to Mike for so willingly sharing his extensive knowledge and experience with his fellow EAA members. These people are not just some "internet expert" who doesnt want to pay for maintenance. These are credibly people saying follow exactly what the Maintenance Schedule says is a BAD IDEA! Much like most people in here saying changing oil at 100 hour interval is a bad idea!
  6. Nothing cheap about going above and beyond to follow all the TBO and maintenance schedule and STILL have a midflight engine failure. One would think is this cause by maintenance induced failure?
  7. What is the maintenance history of that plane? How many year since last rubber change? How many hours since inspecting the carb?
  8. Where are you getting the high likely hood of failure information from? Any links to show the past problem history? Any NTSB or official accident reports citing not inspecting or servicing the carbs was the cause of the accident?
  9. So, that means if the engine is running smoothly, the 200 hour carb inspection can be skipped. If something is working well, no reason to take it apart to look at it and put it back in together.
  10. The Jan 2020 Maintenance Schedule says to change oil at 100 hour if using auto gas and change oil at 50 hours if using 100LL more than 30% of the time. Since doing proper maintenance means following the Maintenance Schedule and to avoid any lawsuit. Should we all change oil at 100 hour if we use auto gas?
  11. The “pay now OR pay later” certainly make some sense. However, by looking at the maintenance record of my plane, they have spent tens of thousands of dollars following all the recommendation to maintain the plane. They still had an engine failure mid flight at 1500 hour Hobbs. Rotax did not compensate them even though they have binder full of maintenance record. In their case they “pay now AND pay later”
  12. So, to properly maintain the aircraft we follow the maintenance manual and change oil at 100 hour and change spark plug at 200 hour?
  13. I completely agree that listening to some internet expert who doesnt want to spend money on maintenance is a really bad idea. But if an IA and a CFI with 50+ years mechanic experience in addition to the FAA' National Aviation Maintenance Technician of the Year award said to us: following everything on the Maintenance Schedule is a bad idea, maybe we should take a second look. -Things like oil change at 50 hours is a must!(Maintenance Schedule says to change it at 100 hour!) -Changing spark plug at 100 hours is also a must(Maintenance Schedule says to change it at 200 hour!) *Notice following everything on the Maintenance Schedule is a bad idea? Taking the Carburetor apart every 200 hour just to look at it and put it back together and take the wings apart every 2 years just to look at it and put it back together does not seem like a good idea at all.
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