outboard charging sys
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From: michigan
outboard charging sys
Since I haven't found an good outboard forum, I'm gonna run this past the super intelligent ford owners.
I've got an alternator on my evinrude, and a burnt up wireing harness.
I can run the output thru some rectifiers without a problem, but how do I regulate voltage without giving the dealer a few hundred bucks. I know the alternator has rotateing magnets, what surplus ford parts would cntrol the voltage?
I've got an alternator on my evinrude, and a burnt up wireing harness.
I can run the output thru some rectifiers without a problem, but how do I regulate voltage without giving the dealer a few hundred bucks. I know the alternator has rotateing magnets, what surplus ford parts would cntrol the voltage?
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The output of the alternator is controlled by the voltage on the field. The field is the winding that is turning in the center, and goes through the brushes.
All a Ford regulator does is look at the voltage of the wiring, and adjusts the voltage on the field wire that goes from the reg to the alt.
Do you realize you will need six diodes to rectify the alt output? But they are usually built inside the alt.
All a Ford regulator does is look at the voltage of the wiring, and adjusts the voltage on the field wire that goes from the reg to the alt.
Do you realize you will need six diodes to rectify the alt output? But they are usually built inside the alt.
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Originally Posted by Franklin2
The output of the alternator is controlled by the voltage on the field. The field is the winding that is turning in the center, and goes through the brushes.
All a Ford regulator does is look at the voltage of the wiring, and adjusts the voltage on the field wire that goes from the reg to the alt.
Do you realize you will need six diodes to rectify the alt output? But they are usually built inside the alt.
All a Ford regulator does is look at the voltage of the wiring, and adjusts the voltage on the field wire that goes from the reg to the alt.
Do you realize you will need six diodes to rectify the alt output? But they are usually built inside the alt.
Anyway an alternator has rectifiers in them (every one I have seen does). If the alternator is putting out AC then the rectifier is shot and needs to be replaced. The output on an alternator is controlled by a voltage regulator that adjusts current and voltage to the field wire in the alternator, which in turn adjusts the output of the alternator. Now if your alternator is internally regulated (most are) then you dont have to worry about anything. The internal regulator takes care of everything. If its not working it needs to be replaced. If both the regulator and rectifier in your alternator are shot I recommend getting a new alternator.
If your alternator is externally regulated and you dont have an external regulator you will need to buy one. I have seen them for as little as $30. They generally just have three wires on them. An ignition wire, a ground and a field output. You run the field output to one side of the field wire on the alternator and the other side of the field wire gets grounded.
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don't forget that typicaly the regulater gets a signal of 1/3 battery voltage. usally comes off one of the stator phases. I don't know the specfics of your boat motors electrical, but you may be able to jump stright power to your field coil and bypass the regulater all together.
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If you run 12 VDC to your field wire you will full field the alternator. It will reach over 20 volts and cook the vehicle computer and PCM, ECU, BCM, exc. along with the diode rectifiers. I know for I have seen it done. When I am in SPL competition I full field the alternators well I crank my system to get the most from my amps. Well the voltage stays low because I am drawing thousands of amps from the electrical system. But if I turn the system off before I cut the circuit that is full fielding the alternators, the voltage of the system will climb about 1.5 volts per second at 2,000 engine RPM. I have never gotten over 16.5 volts and never plan to.
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SPL tech, is the electrical system on an outboard boat motor the same as a car or truck? I know that they would certinly not have a pcm, or bcm. possibly a ecm. Should'nt the diodes be able to handle whatever the strenth of alternating current leaving the stator can possibly put out. I have no idea how many RPM's a freking boat motor turns.
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From: michigan
will have to check wireing diagram again
but believe alternator under the flywheel is only windings with rotateing mags on flywheel - guess that makes it a stator, don't think theres a field winding
5500 rpm on this outboard anyway
but believe alternator under the flywheel is only windings with rotateing mags on flywheel - guess that makes it a stator, don't think theres a field winding
5500 rpm on this outboard anyway
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From: michigan
checked a clymer manual. Rotating magnets, 2 leads from stator, direct to diode then battery on 9 and 12 amp alternators, 15 amp gets regulaor. However- clymer manual does not tell me which alternator on my 55hp outboard. Guess I'll try it on the water with a voltmeter and see what I get
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