Donate NOW and support Jag-lovers!

IMPORTANT! We have moved! The new site is at www.jag-lovers.com and the new Forums can be found at forums.jag-lovers.com

Please update your links. This old site will be left up for reference, until we can move all the old content over to the new site.

Volunteers wanted! Please help us move information from these pages to the new site, and also join us in providing new, exciting content.
Serving Enthusiasts since 1993		 The Jag-lovers Web
Currently with 3,166 members



Modifications to the Jaguar Auxillary Starting Carburetter (ASC)

Modifications to the Jaguar Auxillary Starting Carburetter (ASC)

Home

image11.jpg
ASC
The ASC can cause flooding and can come on unexpectedly. A number of Jag owners wonder at the crude operation of the Jaguar Auxillary Starting Carburetter (ASC) from the 1960's. It is meant to cut out automatically when the engine gets hot but invariably stays on too long or comes on again after a short stop causing flooding when restarting. There are some expensive modifications on the market but I have a solution that cures most of the problems with the addition of a push button and a horn relay. I have had this installed on my 1966 S Type for some years now with satisfactory performance.

This page suggests the addition on a push switch under the dashboard coupled to a latching relay. Once the button is pressed the ASC comes on till either the temperature rises or the ignition is switched off. The advantages of such a system are listed below:

  • No obvious additional switch visable
  • Will not come on till you press the button
  • Automattically cuts off when the ignition switch is switched off
  • Can be disengauged by flicking the ignition switch without stopping the engine

image10.jpg
Location of new switch and relay

The following is a pictorial description of the modification. I would suggest the modification is carried out using Automotive Lucar connectors properly soldered or crimped. These parts can be obtained from a local car accessory shop including the SPST relay.

image6.jpg
The original
circuit before
modification 		image7.jpg
Picturegram
of original
circuit
image8.jpg
Modified
circuit 		image9.jpg
Modified
Picturegram

Here is a complete set of images to help you with the modification.

image1.jpg
Battery 		image2.jpg
Ignition 		image3.jpg
Installation 		image4.jpg
Temperature switch 		image5.jpg
Solenoid

The author takes no responsibility for any damage caused by this modification. You do this procedure at your own risk. No waranties are given or implied.

Send me an e-mail by clicking here alastair@areyn.demon.co.uk

My web page is at www.areyn.demon.co.uk

 

Please help support the move to the new site, and DONATE what you can.
A big Thank You to those who have donated already!

 

       
       
       
       
Go to our Homepage
Improve your Jag-lovers experience with the Mozilla FireFox Browser!

  View the latest posts from our Forums via an RSS Feed!

©Jag-loversTM Ltd / JagWEBTM 1993 - 2024
All rights reserved. Jag-lovers is supported by JagWEBTM
For Terms of Use and General Rules see our Disclaimer
Use of the Jag-lovers logo or trademark name on sites other than Jag-lovers itself in a manner implying endorsement of commercial activities whatsoever is prohibited. Sections of this Web Site may publish members and visitors comments, opinion and photographs/images - Jag-lovers Ltd does not assume or have any responsibility or any liability for members comments or opinions, nor does it claim ownership or copyright of any material that belongs to the original poster including images. The word 'Jaguar' and the leaping cat device, whether used separately or in combination, are registered trademarks and are the property of Jaguar Cars, England. Some images may also be © Jaguar Cars. Mirroring or downloading of this site or the publication of material or any extracts therefrom in original or altered form from these pages onto other sites (including reproduction by any other Jaguar enthusiast sites) without express permission violates Jag-lovers Ltd copyright and is prohibited
Go to our Homepage
Your Browser is: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com), IP Address logged as 3.142.12.240 on 26th Apr 2024 00:45:19