Need help?


Search OutdoorKing-Forum by entering Key Words Below



Who's Online Now
0 members (), 3,837 guests, and 169 robots.
Key: Admin, Global Mod, Mod
Online Spare Parts


Online Store


Newest Topics
Yardking crank case
by Spreefarm - 28/09/25 09:00 AM
Yard King Mower Manuals
by - 23/09/25 01:12 PM
Victa Identification
by RayNewt - 19/09/25 09:28 PM
Mowcart 66
by Willo - 19/09/25 10:41 AM
Ride on rover mower
by Laurie mowing - 16/09/25 02:43 PM
Topic Replies
The bends in the snorkel?
by KevinJP - 30/09/25 05:22 PM
Yardking crank case
by Spreefarm - 30/09/25 09:12 AM
Contessa fan
by mice_elf - 26/09/25 08:58 PM
Yard King Mower Manuals
by Muzho68 - 24/09/25 02:02 PM
Victa Identification
by maxwestern - 20/09/25 10:05 PM
Mowcart 66
by NormK - 20/09/25 12:07 PM
Hello from Vic
by mice_elf - 19/09/25 10:37 PM
Weekend find
by NormK - 16/09/25 05:35 PM
Previous Thread
Next Thread
Print Thread
Rate Thread
Hop To
Joined: Jan 2019
Posts: 85
Likes: 3
Trainee
Hi All

I wanted to post on here to any potential Victa Powertworque experts and people who know about electronics and ignition systems post if I have understood the inner workings of the ignition module.

Regarding the electronic ignition module either as the seperate little silver box or built in to the ignition coil I believe this is how it works. This post is relevant to the Powertworque flywheel magnet, ignition coil, armature etc.

I've been going deep down a rabbit hole trying to understand how the ignition system works on the Powertworque Victa and in particular the ignition coil, armature and most importantly the silver little square ignition module.

I ended up finding a very good free book online from the 1960's that is solely about ignition coils and magnetos. I'll post the link below and you can read for free. If you go to page 221 I reckon this is what the inside of the replacement Victa module ignition module is made up of. Some diodes, capacitor and thyristor that get triggered once a certain voltage is reached gets triggered. I have taken a screenshot below.

There is one last great Australian electronics magazine Silicon Chip magazine and I emailed one of the staff writers and I said the way the magneto looks on the Victa Powertworque with 2 magnets on the flywheel and the U shaped armature (not E shaped) he agreed the internal circuitry would be similar to what I've posted.

I've also posted a photo from a Paul Dempsey book of the system and and explanation of how that circuit works.

I've vaguely thought about spending $30 and taking one apart but I reckon this circuit is pretty much and you can read the photo and someone with some electronic knowledge will see how once the SCR is triggered at the gate it dumps the voltage in to the primary.

And to be honest to really understand you need to know a decent amount about electronics, magnetic flux lines, Faraday's laws of induction etc

On the newer Victa 2 strokes you can't even see this part of the coil visually as it potted inside the coil


page 221

https://www.gardentractortalk.com/d...ion-coils-and-magnetos-by-bob-shores.pdf

Attachments
IMG20250608163423.jpg (253.18 KB, 27 downloads)
IMG_20250608_163846.jpg (268.85 KB, 27 downloads)
IMG_20250608_162609.jpg (89.46 KB, 27 downloads)
1 member likes this: Beech
Joined: Sep 2015
Posts: 2,597
Likes: 212
SENIOR TECHNICIAN & HISTORIAN
Hi Ted12,

There are also a lot of patents you can read on electronic ignition for mowers and instructions
to make a module https://www.electro-tech-online.com/threads/atom-diy-module.142530/

Cheers
Max.

2 members like this: Beech, Ted12
Joined: Jan 2019
Posts: 85
Likes: 3
Trainee
Thanks Max, yes I've looked at those, cheers


Moderated by  bigted, Bruce, CyberJack, Gadge, Mr Davis 

Link Copied to Clipboard
Forum Donation
These Outdoorking Forums have helped Thousands of people in finding answers to their equipment questions.

If you have received help, please consider making a donation to support the on-going running cost of these forums.

October
M T W T F S S
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31
ShoutChat
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Newest Members
Stenny, Andrewb92, Panhead, Nappy12, Brodie410
17,607 Registered Users
Forum Statistics
Forums145
Topics12,999
Posts106,905
Members17,607
Most Online16,069
Sep 18th, 2025
OutdoorKing Showcase
20 Bucks from FB Marketplace
20 Bucks from FB Marketplace
by Return Rider, February 20
Victa Cortina 2 Shed Find
Victa Cortina 2 Shed Find
by Return Rider, January 25
My Rover Baron 45
My Rover Baron 45
by Maxwell_Rover_Baron, April 16
SHOWCASE - Precision Mowers - 2021
SHOWCASE - Precision Mowers - 2021
by CyberJack, April 14
SHOWCASE – Atco Rotary – Paul C - 2020
HOME |CONTACT US
Powered by UBB.threads™ PHP Forum Software 8.0.0
(Release build 20240826)
Responsive Width:

PHP: 8.3.25 Page Time: 0.032s Queries: 24 (0.027s) Memory: 0.6297 MB (Peak: 0.6704 MB) Data Comp: Zlib Server Time: 2025-10-01 20:21:57 UTC
Valid HTML 5 and Valid CSS