Problem with Mariner Regulator rectifier 815279-3

Craybash

Recruit
Joined
Jan 18, 2014
Messages
1
Hello all
I have a 1995 50HP Mariner 2 stroke
with an regulator rectifier problem, I noticed that the taco was not working and the battery not charging.
I checked the AC voltage to the rectifier 16 to 19 volt or there about, I then checked output of rectifier and got O volts with the red wires disconnected from the loom and battery voltage @ 12.6 v with the red wires connected to the loom.

My Question is how do I bench test the Regulator rectifier two yellow wires for AC in and two red wires for DC out, one gray wire for Taco.
what should be the ohms reading I should get between the different wires and can I do a diode check on the rectifier in this circuit ?, I do not now I think it would be hard in the circuit with the regulator.

Note rectifier and Regulator all in sealed unit factory OEM

thanks in advance for any help on this
regards Craybash
 
Last edited:

MH Hawker

Vice Admiral
Joined
Jul 13, 2011
Messages
5,516
Re: Problem with Mariner Regulator rectifier 815279-3

This may help.

rectifier.jpg
 

carholme

Rear Admiral
Joined
Sep 4, 2010
Messages
4,845
Re: Problem with Mariner Regulator rectifier 815279-3

With your engine you have to do an amps check at various engine rpms to determine if the problem is with the stator output or the combined regulator/rectifier. The drawing in the previous post is of no value as that is for a system with a separate rectifier.

From the manual:

REGULATED SYSTEMS
1. Check battery voltage at battery with engine running.
2. If battery voltage is above 14.5 volts, replace voltage
regulator/rectifier. Check condition of battery as overcharging
may have damaged battery.
3. If battery voltage is below 14.5 volts, charge battery;
refer to “Charging a Discharged Battery”. If battery can
NOT be satisfactorily charged, replace battery.
4. If battery accepts a satisfactory charge, check battery
voltage while cranking engine; refer to “Charging a
Discharged Battery”. If cranking voltage is not acceptable,
replace battery.
5. If cranking voltage is acceptable, disconnect larger diameter
RED harness wire from starter solenoid terminal.
6. Remove smaller diameter RED wire (sense lead) from
starter solenoid terminal and connect to the positive (+)
terminal of a 9 volt transistor battery. Ground the negative
(–) terminal of the 9 volt battery to the engine.
7. Connect RED (+) ammeter lead to larger diameter
RED harness wire, and BLACK (–) ammeter lead to
positive terminal on starter solenoid.
8. Secure starter wires away from flywheel.
9. With engine running at the indicated RPM’s, the ammeter
should indicate the following appropriate amperes

9 AMP
RPM AMPERES
Idle 1
1000 4
2000 8
3000 9

16 AMP
RPM AMPERES
Idle 2
1000 10
2000 16
3000 18

15 AMP
RPM AMPERES
Idle 3.5
1000 8
2000 13
3000 14

10. A reading of 18 amperes (16 amp system) or 9 amperes
(9 amp system) at 3000 RPM indicates the
charging system is functioning properly and the battery
being discharging current due to the amperage draw
on the system is greater than the amperage output of
the engine charging system.
11. If ammeter reads less than required amperes @ 3000
RPM, test the stator; refer to “Stator Ohm Test (Alternator
Coils

If you do not have the manual. see my PM to you in Notifications at the top of the page.

Gerry
 
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