alternator specifications

AlternAtor Specifications

Meters

19468DC Shunt

The DC shunt is a very useful tool, especially when working with higher amperages. To use, the electrical system must be opened and the

shunt installed on the negative terminal of the battery. In this position, all en-ergy going into and coming out of the battery must pass through the shunt. The shunt is designed to read voltage drops due to the resistance of the metal be-tween the two meter lead connections. The resistance value has been carefully set to allow the meter to use the millivolt scale. In use, 1 millivolt equals 1 amp. Dealing with millivolts is much safer than dealing with amps.

Diagnostic tool

To identify an alternator system, inspect wire or wires that come from under or behind the blower housing.

• Asinglewirewithnodiodeisgenerally,butnotalways,anAConlysystem

• AsinglewirewithadiodeisgenerallyaDConlysystem.ThedioderectifiesACtoDCforbatterycharging.Thissystemis unregulated in that the energy delivered to the battery is totally dependent on engine speed

• AredwirewithadiodeandblackwirewithoutadiodeisaDual Circuit system that offers DC for battery charging and ACtopowerlights

• Asinglewire feedinganelectronic component (regulator/rectifier) is a rectifiedand regulated systemwhich is lessdependent on engine speed than the DC only system

• Twowiresofthesamecolorfeedingaregulator/rectifierisarectifiedandregulatedsystemthatoffersevenmoreenergy

MostDigitalMultiMeters(DMM)areabletoreadupto10ampsforshortperiodsof time.Atorabove10amps,considerusingaDCshunt or a clamp on type meter to prevent meter damage.

When measuring energy being returned to the battery, Briggs & StrattonspecificationsareprovidedinDCamps.ThepowerisinitiallyprovidedfromthestatorasACandmustgothrougharectificationprocess. If the battery will not charge, the fault may be the battery, rectifier(diode),regulator/rectifierorstator.Atroubleshootingflowchartwillusuallystartatthebatteryandworkbackwards.Asthereisnobenchtestforregulator/rectifiers,testACoutputfromthestator.IfthebatteryandACoutputareOK,replacetheregulator/rectifierby process of elimination.

ACtestsaremadeforACvoltswhiletestsforDCchargingoutputaremadeinDCamps.Oneorbothwillbeusedtocheckthehealthof all Briggs & Stratton alternator systems.

Introduction

©Briggs&StrattonAlternatorSpecificationsMS2288bk6/11

how to uSe

These cards supply information on the different alternator systems provided by Briggs & Stratton. Identify the system being tested by thewireorwiresthatextendfrombehindtheflywheel.Recordthenumber and color of the wires and the color and general type of connector the wires terminate in.

At the top of each card is the system name displayed on thatcardfollowedbyapictureofthewire(s),colorandconnector.Ifaregulator/rectifierispartofthesystem,apicturewillbedisplayedof it. From this information, determine which system is installed ontheenginetobetested.Oncethesystemisidentified,turnthecardover.Thefirstgraphic ishowthesystemwouldbe installedin the simplest manner. The next graphic is how to hook up the test meter. Test specifications to expect follow at the bottom of the page.

teStIng

Unregulated charging systems always deliver the same amount ofenergytothebattery(basedonrpm)whetheritrequireschargeor not.

Regulatedchargingsystemsaredesignedtoprovidechargetothebattery based on its need.

The output from the unregulated system is predictable as long as the rpm is held steady.

Regulated system output will vary based on the battery state ofcharge. After activating the starter motor to start the engine,charge rate will typically be high as the alternator replaces the energy used by the starter. The charge rate will reduce slowly as the battery state of charge levels off. This means that test specifications can be a moving target. The test specificationsfor regulated systems are generally stated as a range such as 1to10ampsDCor3to16ampsDC.

Introduction


©Briggs&StrattonAlternatorSpecificationsMS2288bk6/11©Briggs&StrattonAlternatorSpecificationsMS2288bk6/11

DC only

Part Part numberStator 794103

1


DC only

Test Specifications @ 2800 rpmACvolts NADC amps .5 adc minimumDC amps (DOV®engineswithanaluminumflywheel)

.4 adc minimum


DC only


2


DC only

Test Specifications @ 2800 rpmACvolts NADC amps .5 adc

2


DC only

Part Part numberStator 793640Diode 391507

3


DC only

Test Specifications @ 3600 rpmACvolts NADC amps 1.5 adc

3


DC only


4


DC only

Test Specifications @ 3600 rpmACvolts NADC amps 3.0adc

4


DC only


5


DC only

Test Specifications @ 3600 rpmACvolts NADC amps 1.5 adc

5


DC only


6


DC only

Part Part numberStator 393809Diode 391507Harness 393422

7


DC only


7


AC only


8


AC only

Test Specifications @ 3600 rpmACvolts 14 vacDC amps NA

8

©Briggs&StrattonAlternatorSpecificationsMS2288bk6/11 9

Part Part numberStator 698230Diode 319507Regulator/Rectifier 790292

Dual CircuitRectified or Regulated


Test Specifications @ 3600 rpmACvolts 14 vacDC amps 3adcDC amps through regulator 5 adc

9




10


©Briggs&StrattonAlternatorSpecificationsMS2288bk6/11 11





11

Dual Circuit Rectified or Regulated




12


Dual Circuit Rectified or Regulated

12



4 Amp Regulated - MhI

Part Part numberStator 715255Regulator 715200

13


4 Amp Regulated - MhI

Test Specifications @ 3600 rpmACvolts NADC amps 1g4 adc

13

There should be continuity across two leads from stator and no continuity between either lead and ground.


9 Ampwithout battery


14


9 Ampwithout battery

Test Specifications @ 3600 rpmACvolts 40vacDC amps 1g9 adc

14


5 or 9 AmpRegulated


15


5 or 9 AmpRegulated

Test Specifications @ 3600 rpmAC volts 5 amps system 28vac 9 amps system 40vacDC amps 5 amps system 5 adc 9 amps system 9 adc

15


tri-Circuit

Part Part numberStator 696457Harness 691955Diode 391507DC Shunt 19468

16


tri-Circuit

Test Specifications @ 3600 rpmACvolts 28minimumDC amps at shunt 5 minimum

5 amps +DC

5 amps -DC

16


5 or 9 AmpRegulated

Part Part numberStator 696457Regulator/Rectifier 794360

note: The difference between the 5 and 9 amp regulated systems is the size of the magnets on the flywheel.Smallonthe5 and large on the 9.

17


5 or 9 AmpRegulated

Test Specifications @ 3600 rpmAC volts 5 amps system 28vac 9 amps system 40vacDC amps at shunt 5 amps system 5 adc 9 amps system 9 adc

17


5 AmpRegulated without battery

Part Part numberStator 696457Regulator/Rectifier 698315

18


5 AmpRegulated without battery

Test Specifications @ 3600 rpmACvolts 28vacDC amps 5 adc

18


10 AmpRegulated

Part Part number

Stator 695466Regulator/Rectifier 691185

19


10 AmpRegulated

19

Test Specifications @ 3600 rpmACvolts 20vacDC amps 1g10adc


10 AmpRegulated - MhI

Part Part numberStator 715194Regulator 691185Connector, yellow 399916

20


10 AmpRegulated

20

Test Specifications @ 3600 rpmACvolts NADC amps at shunt 1g10adc

There should be continuity across two leads from stator and no continuity between either lead and ground.


10 AmpRegulated

Part Part numberStator 715798Regulator 691185Connector 399916

21


10 AmpRegulated

21

Test Specifications @ 3600 rpmACvolts 20vacDC amps at shunt 1g10adc


10, 13 or 16 Amp Regulated

Part Part numberStator 696458Regulator* 808877Regulator** 691185Regulator*** 493219

22

*Brownandorangewire go to charge indicator device.

**10,13or16ampsbasedonflywheelmagnet size

***Bluewireisforacharge indicator light


10, 13 or 16 Amp Regulated

22

Test Specifications @ 3600 rpm10AmpACvolts 20vacDC amps at shunt 1g10adc13AmpACvolts 20vacDC amps at shunt 1g13adc16AmpACvolts 30vacDC amps at shunt 1g16adc

Rd=ChargeleadBrn=Chargeindicatorlight

Blue=Chargeindicatorlight

AC

ACDCRd

691185

493219

AC

ACRd

Blue

808877

AC

AC

BrnRd

Or

Charge lead

note: Connect red to orange to turn the system on and to test output.


20 Amp Regulated

Part Part numberStator 696579Regulator 691573Charge wire 691362

23


20 Amp Regulated

23



20 Amp Regulated


24


20 Amp Regulated

24



20 Amp Regulated

Part Part numberStator 795498Regulator 790325Regulator 793660

25


20 Amp Regulated

25



20-50 AmpRegulated


26


20-50 AmpRegulated

26

Test Specifications @ 3600 rpmACvolts 45-50vacACvolts 45-50vacDC amps at shunt 3g50adc

Literature

Kit

MS-0415engIne ALteRnAtoR RePoweR guIDe

Many of you have used this alternator replacement guide to help repower equipment that use alternator systems different from the original specification. We have recently begun to upgrade this guide to better reflect the many questions that we receive from the field. Please note that this guide can be downloaded from The Power Portal website and printed for FREE. If you would likea hard copy please orderMS-0415from your source of supply.

19615 RePoweR teRMInAL KIt

This Engine Repower Terminal Kit willequip you to handle almost any electrical connector or terminal service work on nearly any engine. The generous selection of connectors and terminals provides you with the necessary components to help perform equipment repower.ThisEngineRepowerTerminalKitisdesignedtobeusedintheshoporout in the field.Assembled inadurablecase with an easy to follow chart showing the parts, part numbers, quantities and bin locations, the kit offers 5 empty bins so you can add or store any of your important electrical components or tools. Allcomponentsarereplaceableandcanbe ordered individually. This kit is a great addition to your service repair supplies.

alternator specifications

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