fbpx
Login

 

Jump to Forum..

Master relay

in General Tech Discussion 11 years ago
All, my master relay only delivers 9,4V output (13V input): what can I do!?
Any reaction highly appreciated....

  • Re: Master relay

    by » 11 years ago

    The relay probably has high resistance contacts from arcing internally.
    It is "fried". Replace it. They cost less than $25.00.

    David
    Thank you said by: Hans Labruyere
      
    Report

  • Re: Master relay

    by » 11 years ago

    Thanks for your quick answer. I couldn't find the relay on http://www.ultralightnews.ca/rotax912/ - can i use any relay in his matter?
      
    Report

  • Re: Master relay

    by » 11 years ago

    I do not know what type of airplane you fly, nor where the relay is. In many light aircraft the main battery relay is located next to the battery and is controlled with a "master" switch. This relay is not a Rotax part, but rather one that was put in by the airframe builder. The ones I've seen are plain automotive or marine, four post, 12 volt, continuous duty. They draw less than 1 amp, and have an isolated coil of about 80 ohms, so you can have the ground side of the coil go to the master switch. A typical one is: Cole Hersee 24059-BP continuous duty solenoid.

    David
      
    Report

  • Re: Master relay

    by » 11 years ago

    Any automotive type 12V relay will work. I use a cole hersee like david mentioned. They make them in many different weights and sizes and both intermittant and continuous duty types. Either type will work for starting.

    Bill.
      
    Report

  • Re: Master relay

    by » 11 years ago

    Hans,

    I may have misspoken. I assumed it was the starter solenoid relay, which can be the intermittant or continuous
    duty type. The master switch relay must be a continuous duty rated relay.

    I don't have a relay in my master circuit, Just a 50A switch. Hence my confusion.

    Bill.
      
    Report
You do not have permissions to reply to this topic.
Related Topics
Title Category Replies
shutdown sequence - master switch 912 / 914 Technical Questions 2
What happens if you turn off the master with the engine running? 912iS Technical Questions 13
Fuse Box Relay ID 912iS Technical Questions 5
master switch left on, 2 Stroke Technical Questions 1
Econ mode setting 912IS with airmaster constant speed prop 912iS Technical Questions 11
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