Roketa MC54B 250; Rev Battery Now only a click when started  By  b (Read 1,128 times)

I don't remember any smoke. The fuse on the solenoid blew and I heard it. I have replaced the fuse and now when trying to start it I only get the single click.

I measured the battery voltage and it is 13.2 volts.

voltage checks with a voltmeter will not reveal dead cells.
a battery can read full charge on a voltmeter, but yet still be bad.

reversing the polarity will not burn out your starter, or the solenoid.
there are only 2 other components (regulator and CDI), but they aren't connected to the start circuit.

do a load test on the battery or test it with a hydrometer.
if you don't know how, then take the battery to NAPA or some other parts store and ask them to do a load test on it.

clean the terminals/ connections at the battery, the solenoid, and the starter.
if none of the above helps, then test the solenoid to see if it is actually closing.
remove both of the big wires from the screw terminals, press start button, and check with an ohmmeter.
should read zero ohms.

if you have made it this far, then there is a problem with the starter wires (the 2 big wires going to the starter), or the starter itself.
there is however the possibility that the engine is locked up.

do a quick check of the engine by trying to turn the engine over with a socket and ratchet on the variator nut.
remove the spark plug, and give the engine a few turns, should turn relatively easy.
if the engine turns over, then the problem is with the battery, the start circuit connections, or the starter, or solenoid.

go through the steps i outlined in my previous post.

reversing the battery did not damage the start circuit, although it might have damaged the regulator/ CDI, (doubtful), but neither of these are in the start circuit.

The engine turns over easily by hand.

The new battery is sealed. I guess for a load test I would need to take it to an auto parts store.

I just checked and right now the battery is producing 12.45 volts and the starter has 12.25 volts when the start button is pressed. If there is only a 0.20 volt drop across the wiring through the solenoid and to the battery doesn't that indicate that the connections are good?