fbpx
Login

 

Jump to Forum..

Noticeable vibration at 200+ hours 912iS Sport

in 912iS Technical Questions 9 years ago

  • Re: Noticeable vibration at 200+ hours 912iS Sport

    by » 6 years ago

    My gearbox on a 912iS Sling was swapped out under warranty at about 250 hours. There was a slight vibration noticeable around 5,300 rpm but most noticeable on start-up. Starting was becoming difficult having to use more open throttle than when new. The replacement gearbox restored everything back to normal. Was told that Rotax are still working on a fix and we will get the permanent fix under warranty.
    Thank you said by: Robert Zaleski
      
    Report

  • Re: Noticeable vibration at 200+ hours 912iS Sport

    by » 6 years ago

    Jim,
    Who did you speak to at Oshkosh and what did they say?
      
    Report

  • Re: Noticeable vibration at 200+ hours 912iS Sport

    by » 6 years ago

    Weather finally cooperated and made it to Lockwood. Had the plane finished by noon. They reshimmed and replaced 3 spring discs in the gearbox. The engine was noticeably quieter in idle. None of the “clackity clack” the gearbox seems to produce at idle. I always idle the engine at near 2000 rpm to avoid that regime. The engine seemed smoother in flight and for now the vibration is gone.


    It's been about 3 months since you had your gearbox worked on. How many hours on the box? Any issues?

    Aviation Real Estate Specialist & iRMT

      
    Report

  • Re: Noticeable vibration at 200+ hours 912iS Sport

    by » 6 years ago

    Jim,
    Who did you speak to at Oshkosh and what did they say?


    Someone in the Rotax booth. They claimed to not know what I was talking about...

    Aviation Real Estate Specialist & iRMT

      
    Report

  • Re: Noticeable vibration at 200+ hours 912iS Sport

    by » 6 years ago

    I had my prop balanced this morning. Wow, what a difference. Turns out that I was way out of balance at 0.7 IPS. When all was said and done, we ended up adding approx. 20 grams of weight at the 340 mark on the spinner plate and reduced the reading to 0.07. It was noticeably smoother. Unfortunately I was not able to conduct my usual vibration test due to clouds and weather on the way back. I'll try it again this weekend.

    Aviation Real Estate Specialist & iRMT

      
    Report
You do not have permissions to reply to this topic.
Related Topics
Title Category Replies
912is runup lane A and lane B check differences / unexpected results 912iS Technical Questions 2
Aftermarket voltage regulators for 912iS? 912iS Technical Questions 16
912iS oil leak rear housing 912iS Technical Questions 2
912is EGT fault - Lane A BEFORE engine start 912iS Technical Questions 4
Lithium batteries in 912iS 912iS Technical Questions 12
Follow Us

Recent Videos

Safety First!

 

To receive critical-to-safety information on your ROTAX Engine, please subscribe to
ROTAX-OWNER.COM

ROTALK News



ROTALK NEWS Episode 5
Rotax-powered Sling aircraft from The Aircraft Factory, the AVMAP Navigation and engine monitoring system, and the Rotax powered Tucano Experimental and Light-Sport Aircraft.



ROTALK NEWS Episode 4
ROTAX's 915iS-powered Aquila A211 test aircraft, the Scheibe SF-25C Falke (first-ever 912-equipped aircraft!) and ROTAX factory in Gunskirchen, Austria.


ROTALK NEWS Episode 3
Michael Smith's Rotax-Powered Searey Circumnavigation, the amazing Rotax-Powered Lockwood Aircam and Anthony Caere's chimpanzee rescue operations.

Prize Giveaway!


SUBSCRIBE NOW
to automatically enter this years draw!

Login