Power Pack Question

[McGR]

Re: Power Pack Question

MD- You say 12V is getting to the power pack. Where are you measuring 12V? There should not be any battery voltage present at the power pack. This ignition system operates from induced voltage created by the moving flywheel magnets and the sensor and charge coils. The battery is only present only for cranking and operating accessories, but not for providing a voltage source for the ignition module (powerpack). This is why you can a motor with style ignition with only a pull start, even with no battery present. If battery voltage is indeed present at the powerpack, this could explain the problems you are experiencing.

 

[moondok]

Re: Power Pack Question

Because of weather problems, testing was delayed. On the upside, my regular mechanic will be available next week. Hopefully, we can figure this out soon.

 

[moondok]

Re: Power Pack Question

My mistake. The panel to the left of the power pack is what actually receives 12 volts. The positive cable comes into the motor at the solenoid which is transfered to the starter motor, big red plug, and the panel to the left of the power pack. From this panel, a wire runs to the stator. The power pack itself is not hot.

 

[kevin88]

Re: Power Pack Question

Have you checked the condition of all the fuses? With a blown fuse you will still get 12 volts on the power bus (that your rectifier is connected to) but you won't get any voltage readings at all at the power pack. I have experienced this problem already this year...

 

[moondok]

Re: Power Pack Question

I get voltage from the power pack when the motor is turning over.<br /><br />One of the fuses had been removed when I got the engine. It was between the solenoid and the power stip. I haven't seen any other fuses. If there's one in the timer base, I'm sure I haven't checked it as I don't want to mess with the timing.

 

[McGR]

Re: Power Pack Question

MD- The fuse has no effect on the powerpack. It only provides a over current protection to the battery powered components of the motor. There are no fuses in the ignition system on your motor. BTW, the timer base is a very simple deal. It's just an inductor (a coil wound of magnet wire) mounted on a plate. When the flywheel magnet passes by a voltage is induced in the coil which triggers an SCR (a type of electronic switch) in the powerpack. When the SCR is triggered the energy stored in a capacitor in the powerpack is dumped to ground via the ignition coil primary. This ultimately induces high voltage in the ingition coil secondary winding that produces spark. Getting back to the timer base... The plate that the timer base sensor coil is attached to rotates as the motor accelerates to advance timing. The motor timing is set through linkage adjustment. So, don't worry about taking a closer look at the timer base as the only way to screw up the timing is to mess with the linkage. Also, as mentioned earlier the simple resistance measurement and isolation test will quickly tell you if your timer base is faulty.

 

[moondok]

Re: Power Pack Question

I became a bit confused about the sensor coil and timer base until a friend explained things a little better. I have done the tests for resistance and isolation. So, that part is ok. Can you think of anything I'm missing?<br /><br />It's good to know that I won't alter the timing by running tests. Thanks.

 

[kevin88]

Re: Power Pack Question