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Hello, my name is***** will assist you today.
I think that we may have a bit of a language barries here. I am going to try and get you thru how to repair the engine. Please let me know if I am off on a translation.
450H = 450 Hours
towers = throttle
candles = spark plugs
reels = reeds
pear = water pump
Now after all that, what was the compression numbers that you got on the engine?
Has the boat been sitting for some time?
Dider, do you have a multimeter to do some testing?
Is so start the engine on a hose. Test the voltage on the switch box on the red and the red/white wire. You should be getting 25+V AC at idle and it should come up from there as you increase the RPM. Does yours do this?
Also test the blue and the blue/white wires on the switchboxes as well. These are cranking or running tests. On the Blue wires it should be more than 180V AC
Swap he position of the switch boxes. If the problem goes to the other side, replace the boxes as a pair.
Ok, Remove the black/yellow wire from that switchbox. Test for spark again.
Did you test the voltage on the blue wire as well as the blue/white?
The coils is just a resistance test. It would be so odd for all 3 to so out at once. If you get spark back with the black/yellow off, the problem is in the boat or the harness.
If you get over 180V on the blue/white, the stator is the issue.
In order for the switchbox to send the correct voltage to the coils to fire the plugs, they need 180V AC. Your stator is just not putting that pout any more. replacing the stator will get the engine running again.
When that happens, you have a short in the switchboxes. That is the only thing that will fail the stator like that.
A bad wire internally inside the switchbox that is leading the power from the stator to ground. This would cause the stator to fail repeatedly on the same side.