Can anyone recomend a suitable replacment Voltage Regulator? Mine was a Prestolite VSH 6201N, but it seems to be a tough part to source at a reasonable price up here in Canada..(shipping, taxes, exchange rate, etc..) Maybe a Napa PN or some other generic part?
Voltage Regulator
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Is this for the Motorola alternator that comes on the A4? If so, you can make a connection to the field and use any number of standalone regulators. Here is just one relatively cheap example:
Before you do anything, do you know for a fact the regulator is the issue? If you have the usual A4 35 or 50 amp Motorola, take the existing regulator off and add a test lead to the field wire. With the engine running, touch the test lead briefly to +12 volts. You will hear the engine load up and watch the battery voltage jump up if the alternator is good. If that does nothing, a new regulator isn't going to help.
* warning - you are driving the alternator to full output with this test. Do not leave it this way, the resulting voltage will climb high enough to damage something sooner or later.Joe Della Barba
Coquina
C&C 35 MK I
Maryland USA
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Also please be advised that if you go with an external regulator you'll need to keep the old disconnected regulator mounted on the alternator. It is a critical part of the ignition protection required of all alternators on gasoline powered boats.Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
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Originally posted by ndutton View PostAlso please be advised that if you go with an external regulator you'll need to keep the old disconnected regulator mounted on the alternator. It is a critical part of the ignition protection required of all alternators on gasoline powered boats.Joe Della Barba
Coquina
C&C 35 MK I
Maryland USA
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Fact
Originally posted by joe_db View PostIs this for the Motorola alternator that comes on the A4? If so, you can make a connection to the field and use any number of standalone regulators. Here is just one relatively cheap example:
Before you do anything, do you know for a fact the regulator is the issue? If you have the usual A4 35 or 50 amp Motorola, take the existing regulator off and add a test lead to the field wire. With the engine running, touch the test lead briefly to +12 volts. You will hear the engine load up and watch the battery voltage jump up if the alternator is good. If that does nothing, a new regulator isn't going to help.
* warning - you are driving the alternator to full output with this test. Do not leave it this way, the resulting voltage will climb high enough to damage something sooner or later.
The only thing I know for a FACT is that I will probably break and screw up a few more things before I get my A4 back on her old legs..
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#9 UnapprovedHi....I have issue with me yamaha ft9.9 hp higt trust long term. On me boat I have 2 yellob optima battery of 55 and when I power on the yamaha at min of rpm the volts of charge go to 15.6volts I have talk with yamaha and change the managed rectifier however the issue is something very similar, not arrangement. About we how I get done for not have this issue? What the answer for have a right charge voltage of 14.5 max on charge?
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