NC Bill Posted April 28, 2018 Report Share Posted April 28, 2018 Got the oil. Got the filter. Step by step instructions appreciated. Don't want to mess this up. Link to comment Share on other sites More sharing options...
Roger Lee Posted April 28, 2018 Report Share Posted April 28, 2018 Hi Bill, First you should have bought a new oil filter wrench. You'll need a 17mm & 16mm wrench, a set of dykes to cut the safety wire, safety wire pliers, catch basin and safety wire. I forgot to mention several rags or paper towels. Rotate the prop until you hear it gurgle to make sure all oil is back in the tank. here's a good place to pre-fill the oil filter with oil. You can fill it once, then again and then about half way the third time. Drain the oil and put the plug back in a safety wire the plug. Put a rag under the oil filter and remove the filer. Put a smear of fresh oil on the oil filter gasket and put the filter back on. Once it touches stop. Take a look at a random mark on the filter and then turn it another 270 degrees. Cut the safety wire on the magnetic oil plug and use the 16mm wrench or socket to break lose the mag plug. Put a towel under the plug and unscrew it. Get ready to put your finger tip over the hole as oil may continue to leak out. If the plug looks good clean it off and re-install it. No need to over torque it. It just has to be snug enough not to leak. Then safety wire this plug back in place. https://www.rotax-owner.com/en/videos-topmenu/expanded-video-instructions/39-exp-si-27-010 https://www.rotax-owner.com/en/videos-topmenu/expanded-video-instructions/40-exp-sb-912-055 Now fill the tank with ALL 3 liters of of the Aero Shell Sport Plus 4. If you have pre-filled the oil filter there is no need to turn the prop to fill the oil filter. If you forgot to do this then rotate the prop and fill the oil filter. Your done and just in time to take the wife to dinner. Link to comment Share on other sites More sharing options...
WmInce Posted April 28, 2018 Report Share Posted April 28, 2018 2 hours ago, NC Bill said: Got the oil. Got the filter. Step by step instructions appreciated. Don't want to mess this up. Rotax Mainenance Manual (Line Maintenance) Effectivity: 912 Series Edition 3 / Rev. 2, February 01/2015 Chapter: 12-20-00 page 49 --------------------------------------- Start there, then work your way through; oil change (Section 11.2), filter change/inspection (Section 11.3-4), then mag plug removal/inspection (Section 12). I highly recommend, when you begin the actual oil and filter change, DO NOT GET INTERRUPTED! Start it and complete it. According to Dean Vogel, Lockwood Aviation, he has fielded more than one tech support call, where guys got interupted during their oil changes (phone calls) and forgot to put new oil back in the reservoir. After starting their engine, it did not take long for the engine to sieze. Just a friendly word of warning. Link to comment Share on other sites More sharing options...
Anticept Posted April 28, 2018 Report Share Posted April 28, 2018 For written references: 912 ULS: Rotax line maintenance manual chapter 12-20-00 section 11.2, 11.3, 11.4. 912 iS: Rotax line maintenance manual chapter 12-20-00 section 12.2, 12.3, 12.4. Rotation of the crank is needed for 20 turns, which after factoring in the gearbox ratio, is about 10 full turns of the propeller (actually, it's less than that, but 10 is a good round number). Link to comment Share on other sites More sharing options...
Roger Lee Posted April 29, 2018 Report Share Posted April 29, 2018 Corey, All the new filers (825-016) can be pre-filled again. There is no check valve so no need to rotate the prop unless you didn't pre-fill it. Only the old filters (825-012) have have the prop rotated. There should not be any more of these at a service center and maybe only what you may have on your personal shelf. Link to comment Share on other sites More sharing options...
Roger Lee Posted April 29, 2018 Report Share Posted April 29, 2018 Hi Corey, I destroyed a new oil filter with the new oil filter wrench proving a point. The new wrench is 304 stainless. Take a look. The whole filter rattles when I took it off. Pulled the filter base right out of place. Link to comment Share on other sites More sharing options...
Anticept Posted April 29, 2018 Report Share Posted April 29, 2018 17 minutes ago, Roger Lee said: Corey, All the new filers (825-016) can be pre-filled again. There is no check valve so no need to rotate the prop unless you didn't pre-fill it. Only the old filters (825-012) have have the prop rotated. There should not be any more of these at a service center and maybe only what you may have on your personal shelf. I still have some left yes. Also why did you include the video? It's neat but I've never had filters that tight that I put on. For some goofy reason though, I've seen filters from other places that are gunther'd on, and I have to tell them that contact with the gasket means contact, not contact plus hand tight. You can feel the filter contact with a light touch, then do the 3/4 turn! Link to comment Share on other sites More sharing options...
Tom Baker Posted April 29, 2018 Report Share Posted April 29, 2018 Also you should replace the crush gasket on tho oil drain plug. Rotax part number 250-010. Link to comment Share on other sites More sharing options...
Roger Lee Posted April 29, 2018 Report Share Posted April 29, 2018 Hi Corey, I trashed that filter to use the wrench past its limits because someone told me they bent a wrench just putting the filter on. So I wanted to prove them wrong. You can't bend that wrench with a normal oil change. I think if you bend that wrench maybe you shouldn't be doing oil changes. Link to comment Share on other sites More sharing options...
FlyingMonkey Posted May 1, 2018 Report Share Posted May 1, 2018 Sounds like somebody was using my mechanical rule of thumb: "If force doesn't work, apply more of it." Link to comment Share on other sites More sharing options...
sandpiper Posted May 1, 2018 Report Share Posted May 1, 2018 The bigger the hammer the better the job! Link to comment Share on other sites More sharing options...
WmInce Posted June 2, 2018 Report Share Posted June 2, 2018 In the Rotax Line Maintenance Manual, Oil Change section, Step 8 says: "After carrying out the oil change, the engine should be cranked by hand in the direction of engine rotation (approx. 20 turns) to completely refill the entire oil circuit." --------------------------------------- Question . . . what is meant by "approx. 20 turns?" Engine rotation's or prop rotation's? Gear reduction ratio is 2.43:1 for the Rotax 912. Bottom line . . . how many propeller blades should we be pulling through, to achieve the "20 turns?" My guess is about 25 blades. (20÷2.43x3=24.69). Link to comment Share on other sites More sharing options...
cdarza Posted June 2, 2018 Report Share Posted June 2, 2018 Depends - what brand is your propeller Link to comment Share on other sites More sharing options...
cdarza Posted June 2, 2018 Report Share Posted June 2, 2018 Bear with my humor. Too much caffeine on a rainy day I wanna go fly Link to comment Share on other sites More sharing options...
WmInce Posted June 2, 2018 Report Share Posted June 2, 2018 7 minutes ago, cdarza said: Bear with my humor. Too much caffeine on a rainy day I wanna go fly Link to comment Share on other sites More sharing options...
Anticept Posted June 2, 2018 Report Share Posted June 2, 2018 4 hours ago, WmInce said: In the Rotax Line Maintenance Manual, Oil Change section, Step 8 says: "After carrying out the oil change, the engine should be cranked by hand in the direction of engine rotation (approx. 20 turns) to completely refill the entire oil circuit." --------------------------------------- Question . . . what is meant by "approx. 20 turns?" Engine rotation's or prop rotation's? Gear reduction ratio is 2.43:1 for the Rotax 912. Bottom line . . . how many propeller blades should we be pulling through, to achieve the "20 turns?" My guess is about 25 blades. (20÷2.43x3=24.69). Engine crankshaft 20 turns. If you have a 3 blade prop, 60 blades is a good measure. Link to comment Share on other sites More sharing options...
WmInce Posted June 2, 2018 Report Share Posted June 2, 2018 1 hour ago, Anticept said: Engine crankshaft 20 turns. If you have a 3 blade prop, 60 blades is a good measure. Corey, since the gearbox rotates at a slower rate than the engine (2.43:1), wouldn't that equate to 48.6 engine crankshaft revolutions? Link to comment Share on other sites More sharing options...
Anticept Posted June 2, 2018 Report Share Posted June 2, 2018 I find 20 revolutions sometimes isn't enough to bring up oil pressure (which confirms the system has been purged of the majority of air) Link to comment Share on other sites More sharing options...
Roger Lee Posted June 2, 2018 Report Share Posted June 2, 2018 If you pre-fill the new filter (825-016) no rotation is necessary. It can be filled 3 times. The old filter (825-012) had an internal check valve and couldn’t be pre-filled. Link to comment Share on other sites More sharing options...
FredG Posted June 2, 2018 Report Share Posted June 2, 2018 Roger, not sure what you mean, "It [the oil filter] can be filled 3 times." Link to comment Share on other sites More sharing options...
Buckaroo Posted June 2, 2018 Report Share Posted June 2, 2018 Also never turn the prop after the oil has drained or the filter off as you will get air in the oil lines and this can get real bad! Link to comment Share on other sites More sharing options...
Roger Lee Posted June 2, 2018 Report Share Posted June 2, 2018 I mean you can fill the filter to the top once and it will settle into the filter body and surrounding case. You can fill it again and let it settle and then do it again. 3 times. Then the filter will be full of oil. Then there is no need to rotate the prop to fill the filter. Link to comment Share on other sites More sharing options...
ls6pilot Posted June 2, 2018 Report Share Posted June 2, 2018 Anybody lazy like me and use one of these to rotate the prop? https://www.amazon.com/KD-Tools-SWITCH-REMOTE-STARTER/dp/B0051XCY8C Link to comment Share on other sites More sharing options...
BMcCand - N248CT Posted June 4, 2018 Report Share Posted June 4, 2018 I think Rotax says to turn by hand. See SI-912-010R10 para 3.1. Further, the battery is supposed to be disconnected while turning the prop. I usually spin the prop with lower spark plugs out for inspection, that is much easier. After reading this thread, I need to get a new filter wrench for the -016 filters I now have. Bill Mc. Link to comment Share on other sites More sharing options...
ls6pilot Posted June 4, 2018 Report Share Posted June 4, 2018 This was a tip from the 2 day rotax inspection course at Lockwood with Dean Vogel. You can use that clip to bypass the ignition and just spin the prop while you sit in the cockpit and monitor the oil pressure. Link to comment Share on other sites More sharing options...
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