Puppeteer

Author Topic: Converting an AA1 from Fixed to Variable Speed?  (Read 4468 times)

Mr. Lister

  • Newbie
  • *
  • Posts: 1
    • View Profile
Converting an AA1 from Fixed to Variable Speed?
« on: September 15, 2010, 07:47:15 AM »

Hello Lister Engine Forum! 

I got a question for you sage Petter heads!
Recently a mint AA1 that is set up for fixed speed operation fell into my hands. 
I would very much like to change this mint AA1 to a run as a variable speed motor. 
Is this possible  ??? And if so, what parts are needed?  How does one proceed?


SHIPCHIEF

  • Hero Member
  • *****
  • Posts: 728
    • View Profile
Re: Converting an AA1 from Fixed to Variable Speed?
« Reply #1 on: September 18, 2010, 05:21:09 AM »
SORRY;
I don't know an AA1 from a BBC, but i do know many small diesels have a vaiable speed governor that is locked to be a single speed governor with dual set screws on the speed control lever.
These can be adjusted to run between governed idle speed and governed full speed, as used in a power boat. You need to look at the governor and try to decide if it's one of those that can be used both ways.
Ashwamegh 25/2 & ST12
Lister SR2 10Kw 'Long Edurance' genset on a 10 gallon sump/skid,
Onan 6.5NH in an old Jeager Compressor trailer and a few CCK's

listard-jp2

  • Hero Member
  • *****
  • Posts: 583
    • View Profile
Re: Converting an AA1 from Fixed to Variable Speed?
« Reply #2 on: October 08, 2010, 03:01:44 PM »
If you wish to convert your Petter AA1 engine to truly variable speed (from tickover to full speed) you will need a fair few parts to achieve this, therfore you might like to try:

jimp@perkins.fsnet.co.uk

He specializes in post WWII Petter, but is also likely to know where to
find anything prior to that.

Jim is a retired Petter service engineer, and has loads of parts for the Petter AA1 engine.