I usually have to drill start a good motor when the spark is a little weak (old coil etc) as we have seen the reasons why a magneto produces a better spark the quicker flywheel spins.
The later side start engines have a better spark on cranking speed and is why I use that coil with a PT module in a points engine.
The 24's are a lot slower to crank over ,maybe the high comp heads that they have standard also helps them to start easier.
It wouldn't take too long to shave a mm off a head to see if starting is easier than a standard motor swap.
I know with the points ignitions on Victa's people use a module but Victa used a different winding in the electronic coil so it would produce a better spark at a lower revolution for easier starting etc.
With old motors that need a rebuild the ignition system if far from new condition ,I've had rebuilt motors that you use a new coil in and there is a big difference in starting .
I would also usually test the magnets with a big flat screw driver because I've had a few that the magnetism is a lot weaker.
Reasons why a magneto produces a better spark with Higher RPM If anyone hasn't seen it before. A magneto generates electrical energy through electromagnetic induction, which is enhanced when the flywheel spins faster.
Electromagnetic Induction: Magnetos operate on the principle of Faraday's law of electromagnetic induction, which states that a change in magnetic flux through a circuit induces an electromotive force (EMF) in that circuit. The quicker the magnetic field changes, the greater the EMF produced.
Speed of Rotation: As the flywheel spins faster, the magnets within the magneto move more quickly past the coils of wire. This rapid movement leads to a more significant and quicker change in magnetic flux in the coils, thereby generating a stronger EMF.
Increased Voltage: The strength of the induced voltage in the magneto is directly related to the rotational speed. Therefore, as the speed of the flywheel increases, the voltage produced by the magneto also increases, resulting in a stronger spark at the spark plug.
Faster Discharge: A high-voltage output translates to a quicker discharge of electrical energy through the ignition system. This can lead to a more powerful spark when it reaches the spark plug, improving combustion efficiency and engine performance.
Engine RPM and Performance: In many applications, especially in small engines and two-stroke engines, the performance is directly linked to the RPM and the efficiency of ignition. A faster spark means better ignition of the fuel-air mixture, leading to improved performance and responsiveness of the engine.
Overall, the quicker the flywheel turns, the more efficiently the magneto can produce a high-energy spark, which is crucial for optimal engine performance.
