Hello,
I have a re-manufactured 70 hp Mercury outboard, unsure of year, (80s). Running fine all summer and then no spark in all cylinders. Here is what I have tried so far.
1) Disconnected the black with yellow wire to test the kill switch. Still no spark. (reconnected)
2) Disconnected the 2 yellow wires from the rectifier. Still no spark. (reconnected)
3) Began testing the stator. This motor has the red stator. The white w/ green to the green w/ white were disconnected from the adapter assembly and tested within specs. I had to disconnect to test, see picture.
Then came testing the blue to ground and this is where I need help. With everything connected I got a resistance of 3.2 m ohms when it should be open, and a DVA reading of 16.7 v when specs call for 180-400 v. I then disconnected the blue wire from the switch box and retested. I had a restistance of 17.8 m ohms (out of spec, should be open) and a DVA of 290 v, in spec of 180-400 v.
From my understanding this would point to the stator being bad, but with the adapter assembly on this motor it adds another question mark.
My question is where do I go from here? Is there a way to determine if the adapter assembly is bad since it is in line with the stator when testing the blue to ground, which is where I am out of spec?
Any advice or directions to go is greatly appreciated. let me know if you need any other info to better advise.
Thanks!
I have a re-manufactured 70 hp Mercury outboard, unsure of year, (80s). Running fine all summer and then no spark in all cylinders. Here is what I have tried so far.
1) Disconnected the black with yellow wire to test the kill switch. Still no spark. (reconnected)
2) Disconnected the 2 yellow wires from the rectifier. Still no spark. (reconnected)
3) Began testing the stator. This motor has the red stator. The white w/ green to the green w/ white were disconnected from the adapter assembly and tested within specs. I had to disconnect to test, see picture.
Then came testing the blue to ground and this is where I need help. With everything connected I got a resistance of 3.2 m ohms when it should be open, and a DVA reading of 16.7 v when specs call for 180-400 v. I then disconnected the blue wire from the switch box and retested. I had a restistance of 17.8 m ohms (out of spec, should be open) and a DVA of 290 v, in spec of 180-400 v.
From my understanding this would point to the stator being bad, but with the adapter assembly on this motor it adds another question mark.
My question is where do I go from here? Is there a way to determine if the adapter assembly is bad since it is in line with the stator when testing the blue to ground, which is where I am out of spec?
Any advice or directions to go is greatly appreciated. let me know if you need any other info to better advise.
Thanks!
