FB Simo electric problem

[Tomislav Markač]

Hi guys. I have one issue with my paramotor that I cant solve. I bought used FB Simo, and did 2 flights, and it all seemed like it has been working fine. After I recharged battery, electrical problem(s) started to appear. When I start my motor with propeller(electric start), electrical starter wont turn off and I am not holding start button anymore, when I turn off main switch, still electric starter is running, and only way to turn it off is to unplug battery. I tried to measure voltage on starter and there is always voltage on, it doesnt matter if main switch is on or off, and then after some time, it starts to work normal. I took relay off and tried it and it seems like it has been working fine, and tried wires with multimeter and there is no short circuit. Did anyone have similar issue or have an idea what could be going on?

[AndySV1K]

I assume there is a starter relay in there?

Sometimes these fail by the contacts effectively welding together, it could be that you trigger the starter with the button and the contacts in the relay are holding on.

Andy.

[AndyB]

Most elec start have a relay as the current drawn by the starter is too large for the switch. Sounds like relay sticking on. These are £4 in Halfords.

If no relay (all current goes thru starter switch) then switch sticking on.

Andy

[GR002]

Above replies are all right, its definitely the relay just make sure the replacement is has at least  the same amp load capacity. If your battery is 12 volts a car one will do