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That Field Acceleration relay is interesting. Based on its name I assume the relay picks during acceleration. It’s contact shunts the motor field resistance, increasing motor torque. The coil has tw ...

Charlie, I bought two of these units back in June from a different Ebay vendor. The only issue I had was an intermittent connection in the line cord at P/S end of one unit. It uses a standard compute ...

In a PM generator like the Rotax, frequency is not a function of the number of coils in the stator, it's a function of the number of magnets in the rotor divided by two. Divided by two because the ma ...

The diode is minor, why do you want the starter contactor to self hold?

Gilles,

Often the failure of a relay can be traced to a design choice. On a single pole relay the most common failure modes (in no special order);
Open coil (won't pick)
Shorted coil (blows fuses ...

Bob,
You have a few misconceptions about the Rotax regulator. All the power components are screwed to the case, heatsink compound is used. Rotax does not depend on the potting compound for heatsinki ...

Charlie, Yes I agree with you, that was my first thought also. But the more I looked at these, the more my opinion evolved. I lean towards vibration on this version for several reasons;

1). Sample ...

Bob
Here are the details of about a dozen Rotax regulator failures. Draw your own conclusion(s).

First some background. There are several versions of the Rotax 912/Ducati regulator. Older vers ...