Lucien, This form is very unique. Its about information on a plane of which 95% are built exactly the same way. All Vans E-LSAs have to be built exactly the same to receive their Airworthiness certificate. There are approximately 72 flying. Not all owners are on the form but most are. So when guys have problems they usually report them here.
I would say that at least 5 guys have had the Honeywell oil pressure sender fail on their RV12s. This sender comes installed on the engine when it comes out of the box. Why do you think that has happen?
If you google Rotax 912 oil pressure sender failure you get a whole page of hits. Why do you suppose those failed? Throughout history manufactures have released products that are very well made but have had some little problem that goes bad over and over again. For whatever reason they just refused to fix that problem. Lockwood Aviation, one of the largest Rotax dealers in the USA, actually has a part number for a kit that they created on their own, to better support their customers. This kit is used to relocate the sender to the firewall. Why do you suppose they decided to create and sell this kit? Feel free to read my post at this link:
http://www.vansairforce.com/communit...t=64145&page=2
Look for my thread posted 11-13-2010, 06:13 PM on the above link. The Honeywell unit cost $300 unlike the old VDO unit which cost $45. Which do you have on your Pusher? I simply researched the problem and used some common sense, then came up with a solution so I wouldn’t have to spend $300 every so often. I then shared this info on the form for others to read and decide on their own if they think they should make the change.
The RV12 was released for sale to the public April 2008. Although the Rotax 912ULS is not new technology however the installation on the RV12 is basically new. Vans cannot plan for every eventuality but as they gain more experience they may or may not make changes. We live in the land of Lawyers so every manufacture is very careful about what they do or say about their products. As I said before Rotax has many Service Bulletins as well as ADs about their engines just like everybody else. As good as it is there maybe some small room for improvement to the RV12 owner to make it work better and save some money along the way. I'm glad yours works perfectly, mine didn’t so I fixed it. Maybe my prop is different than yours and caused more vibration. Maybe the air flowing through my cowl caused the wire to the sender to vibrate. Maybe my 912 is a lot newer than yours and it has some slightly different harmonic vibration. Who knows. When do you plan to start on a RV12 so we can compare more exact notes?