25 HP Kaw, want to test stator AC, need the V spec

MXHalofan

LawnSite Member
Location
Kansas City MO
How many volts should the stator be pushing on this 25 HP Kawasaki? Got low voltage to the batt and need to check the stator before buying a regulator. Thanks guys.
 

mowerknower

LawnSite Senior Member
Location
obamanation
Stator Coil Resistance
• Disconnect the connector [A].
• Measure the stator coil resistance.
(Electric Starter Model)

Connect an ohmmeter between stator pins .
Stator Coil Resistance (Electric Starter Model)
0.01 to 0.1

If the meter does not read as specified, replace the stator coil.
If the coil has normal resistance, but the voltage inspection showed
the alternator to be defective; the flywheel magnets have probably
weakened, and the flywheel must be replaced.
• Check for continuity between each stator pin and ground. There
should be no continuity (infinite ohm).
If the stator coil fails any of these tests, replace the coil with a new
one.
Unregulated Stator Output
• Disconnect the connector [A].
• Connect AC voltmeter to the stator pins .
• Start the engine. Run the engine at the 3 000 rpm speed.
• Voltage reading should be minimum 26 VAC/3 000 rpm.
If the AC voltage reading is less than the specification, replace the
stator.
Unregulated Stator Output (MIN)
26 VAC/3 000 rpm
 

piston slapper

LawnSite Platinum Member
Location
Tampa Fl
What mower is it on.....could be a bad fuse..
Make sure you have 12 volts going to the regulator and that the regulator is grounded to the sheetmetal or engineblock.
Posted via Mobile Device
 
OP
M

MXHalofan

LawnSite Member
Location
Kansas City MO
OK thanks guys, resistance checks turned out good and so did the VAC (29). I'll check the fuses.

The regulator had debris packed in behind it, inside it's cooling block.

Model of this engine is FH721V. Been a good engine. Has 900 hours with no problems.
 
OP
M

MXHalofan

LawnSite Member
Location
Kansas City MO
Thanks for mentioning the fuses Piston Slapper. That's what it turned out to be. The fuse was melted like it'd been heating up for a long time. I'm a dork for not checking fuses sooner.

I had bypassed my presense switch with a jumper last year. Noticed the blade clutch slow to engage last year after a power wash. Turns out the jumper got corroded so badly it finally quit working yesterday. Must have put a strain on the whole 12v system, heated the fuse regularly. I've never seen a fuse body melted like this, a pin snapped in half and blacked out from heat.

Got the jumper cleaned and the fuse replaced. Gonna charge the batt and hope for good voltage. Thanks guys.
 

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