Marty_d Posted September 14 Author Posted September 14 Hi Mike, yep half and half with demineralized water. 1
IBob Posted September 14 Posted September 14 Marty, re the 912 oil pressure: Originally Rotax fitted a VDO (or VDO type) sensor. These put out a voltage, but were prone to failure. They then moved to a sensor that puts out 4-20mA, which is far more reliable. However, you need the right gauge to go with whichever sensor you have: they are not interchangeable. 1 1
Marty_d Posted September 14 Author Posted September 14 Thanks Bob. Yep I have the right gauge, it just doesn't have any wires connected to it! 😄 1 1
sfGnome Posted September 15 Posted September 15 3 hours ago, Marty_d said: Yep I have the right gauge, it just doesn't have any wires connected to it! Perhaps you have the new Rotax ‘Mind Reading’ gauge. It’s very reliable, because there aren’t any connections to break… 😝😁 1 3
facthunter Posted September 15 Posted September 15 I always make a Point of pre-pressurising ANY new or "Left Sitting" motors prior to running them. The OIL Pressure Pick up Point is a suitable Place to supply the "Forced oil" .Do it for Longer where Hydraulic Lifters are installed to ensure they are Pumped up turn the engine with one plug out of each cylinder for half a dozen turns, replace plugs and "feel" compressions. Nev
PureCaboose Posted September 15 Posted September 15 8 hours ago, Marty_d said: Thanks Bob. Yep I have the right gauge, it just doesn't have any wires connected to it! 😄 One of the new Bluetooth gauges 😆 1
Moneybox Posted September 15 Posted September 15 9 hours ago, Marty_d said: Thanks Bob. Yep I have the right gauge, it just doesn't have any wires connected to it! 😄 I doubt you have one but early oil pressure gauges had a capillary tube, no wires needed apart from illumination. 1
onetrack Posted September 15 Posted September 15 Bluetooth probably not as silly as it sounds - you can already get Bluetooth trailer/towing lights for something you want to tow, that has no lights, or non-operational lights.
facthunter Posted September 15 Posted September 15 Capillary tube is the Most reliable done properly. Bit slow to register. Unreliable warnings are as bad as having none. Nev
Marty_d Posted September 15 Author Posted September 15 I almost forgot - the control lock. When not in use, the two angled tubes pivot back towards the stick holder and clip parallel with the centre tube. Quite light but strong. 6
facthunter Posted September 16 Posted September 16 I reckon He designed and Built it. We have a Genuis in our Midst. Nev 1 1
Marty_d Posted September 16 Author Posted September 16 49 minutes ago, sfGnome said: That’s neat. Your design or purchased? My design, but the idea is out there in others - probably far better than mine but using steel and machined parts, where I wanted to stick to ally tube and printed plastic. 1 1
Moneybox Posted September 20 Posted September 20 On 16/09/2025 at 10:32 AM, Marty_d said: My design, but the idea is out there in others - probably far better than mine but using steel and machined parts, where I wanted to stick to ally tube and printed plastic. Did you do the CAD drawing for all those plastic parts? If so, what program?
Marty_d Posted September 20 Author Posted September 20 32 minutes ago, Moneybox said: Did you do the CAD drawing for all those plastic parts? If so, what program? Yep, Autodesk Fusion 360. I have kids in high school so using a free education version.
Moneybox Posted September 20 Posted September 20 Just now, Marty_d said: Yep, Autodesk Fusion 360. I have kids in high school so using a free education version. I love Autocad but I don't have it anymore and I've tried a heap of free ones, nothing stacks up. I've been using Sketchup but it's not accurate enough for some jobs. 1
Marty_d Posted September 20 Author Posted September 20 Yeah Fusion is light years ahead. I've used SketchUp for renovation drawings and it's fine for stuff like that, but anything with detail that I want to print is Fusion. 1
Ian Posted September 21 Posted September 21 Freecad can provide the functionality your need without the licensing shenanigans of products like fusion 360. There are also tutorials online which can provide basic instruction for those without a background in this space or for those with more advanced skills there more advanced tutorials. There's also a comparison between Freecad and Plasticity. 1 2
Moneybox Posted September 21 Posted September 21 Marty, I know I'm of on a tangent here but I've just downloaded a free personal-use copy of Fusion. I always used Autocad versions 4, 10, 12, 14 and 2000. Everything in 2D but I really want to learn 3D modeling. I never used icons so it's nice to see that Fusion will accept keyboard commands. Thanks for getting me started. Phil
onetrack Posted September 21 Posted September 21 Moneybox, isn't the free version of Fusion only good for 3 years?
sfGnome Posted September 21 Posted September 21 32 minutes ago, onetrack said: Moneybox, isn't the free version of Fusion only good for 3 years? That’s my understanding. I’ve been using Sketchup for years (no problem with accuracy - just set the snap to 0.1mm or whatever you want), and the thought of losing access to fusion after 3 years made it not worth learning. Mind you, Sketchup has some foibles that make it a bit of a pain some (many) times, but there’s generally a workaround. 1
Moneybox Posted September 21 Posted September 21 4 hours ago, onetrack said: Moneybox, isn't the free version of Fusion only good for 3 years? I don't know. It's just loaded up as for personal use and if I get three years I'll be happy with that. 1
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