Recon I got nothing else to offer, wish I did. An ALT is a pretty simple device, apply 12V to S and Ex, rotate and so long as they are connected to the Bat being charged they work or they don't
I also know that ALT from DB and have one sitting on the shelf (100 amp), its a piece of crud. Got a one wire and a connector to add Sense and Excite leads, and never did work correctly
I'm thinking problem in the 10 pin engine connector or splice connection with the 50 amp breaker
Red from starter post to 50 amp
Red/Purple from 50 amp to 10 pin and ALT
Purple from 10 pin to ALT
Get an ohm meter and disconnect battery, then ring out the wires
Check the fitting on top the drive that the intake hose connects to. Many times the fitting gets corroded and restricts water flow
Can also get a piece of clear hose from the HW store and place it inline using barbed fittings. Connect it at the thermostat where the hose comes from the...
Don't know what boat/motor. Assuming I/O
Should be no reason not to hose the boat down, so long as the water doesn't get high enough to reach the starter
How long have you had the boat?
There are fuses in several locations and there should never be smoking from hot wires unless the fuse was replaced with a higher amp type. Your ignition fuse should be no larger then 20 amp
Thanks roscoe, you the guy, worked like a charm. Also nice all the fuses are easy to get to. Bad part is the printing is dark on black, hard to read, and my guess may not last very long
I don't have a diagram from your motor. I have one for the 5.8 (351) MPI and it also shows a jumper between the two points. Not saying yours is this way, but may be spliced inside the harness.
Measure voltage on each wire with key on and off to see if either or both switch
Don't know if Crownline has a breaker or a fuse
Look under the helm and follow the Red/Purple wire from the key switch to a breaker or inline fuse. Many cases its a 20 but can be a 15 amp
If there is a bad connection and it looses a connection, it can blow the ALT real quick. The Sense and Excite can be connected together so long as they read Bat voltage.
That said, the excite would need to be disconnected to keep from draining the Bat when its off
Assuming your talking about the 86 Conroy 4.3
Seeing anything above 15V usually means the ALT sense lead is not connected to see battery voltage, or the regulator is bad. AS dubs mentioned, could be a grounding issue.
