Dead Battery in 550 Sportsman - Polaris ATV Forum
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post #1 of 7 (permalink) Old 08-13-2019, 11:19 AM Thread Starter
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Dead Battery in 550 Sportsman

Riding yesterday on my 2012 550 Sportsman and it died. Seems the battery was dead. Not sure why the battery died. Charged the battery and it seems fine, the bike is putting out 12.71 volts when running. Checked wires for obvious, breaks, shorts, blown fuses etc. Scared to go out on it and have it kill the battery again.
Any information about what to look for appreciated.
Had to get towed in by a Honda.
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post #2 of 7 (permalink) Old 08-13-2019, 12:25 PM
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Yeah well that's the only time a Honda leads on the trail!!!!!!

Test the voltage running at 3,000rpm. I suspect a bad voltage regulator.

2011 Sportsman® 800 EFI
GURU front brush guard
GURU rear brush guard
Polaris front lock n ride cargo box
Polaris rear rack extender
Warn RT 3.0 winch w/amsteel synthetic line
Viper aluminum haus fairlead
Polaris front spring adjusters
Ricochet a-arm guards
Ricochet full frame skid plate
ITP T-7 beadlock 14" w/OMF inner rim guards
Maxxis big horn 2.0 26x9 front
Maxxis big horn 2.0 26x11 rear
QSC clutch kit
EPI HD springs front n rear
ODI rogue 130mm grips
Ultraseal commercial grade tire sealant (front)
Highlifter tire sealant (rear)
CTEK 3300 battery maintainer
added 7 zerks
beefed up wiring harness
OGIO rear bag
ROTOPAX 1gal. + 2gal. gasoline can
Jccapri bushing kit
Kolpin Over Fenders
Rigid Industries E-Series 10" flood
Walker Evans struts
NGK Iridium's (2,500 miles on Champion's and they looked great!)
Odyssey Extreme battery PC545

2018 Sportsman® 570-T
2019 Aluma® A8818
2020 Outlander® 1000R XXC (on order, ETA mid-Sept)
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post #3 of 7 (permalink) Old 08-13-2019, 12:30 PM
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Test the battery first. Make sure it is good, then the charging system. Batteries used to give us a warning before they went bad..... slow crank, hard starting cold and so on. But not any more. They can go bad at any time for no reason. I parked my car in the garage on a Saturday night and sunday morning it wouldn't go. Goofy lights lit up on the dash. Bad battery. Compact yard tractor did the same thing.

Mine: 2018 Sportsman 850SP - 26" Bear Claw HTRs on OEM steel wheels(I really don't like the Aluminum ones)
Polaris Hand warmers, Mirrors.
Hers: 2019 Sportsman 450. 26" Bear Claw HTRs on Moose 427X Wheels.

2007 Sportsman 500 EFI, Polaris Winch, 25" Bear Claws QSC Clutch Kit, Hand Warmers
2001 Magnum 325 MOSE 12" rear wheel conversion. 25" Sedona Coyote tires
2017 Polaris Ranger 1000XP - Roof and front glass
2018 Kawasaki KLR650
2001 Magnum 325 Warn winch and Moose 60" plow-Sent to Daughter and Son-In-Law since his blew up
SOLD 2004 Sportsman 600 Twin
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post #4 of 7 (permalink) Old 08-13-2019, 06:19 PM Thread Starter
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I checked the voltage at 3000 rpm, registers 12.71 volts. Battery is good also. Not sure where/what to check next. Took it for a ride this afternoon and it ran fine.
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post #5 of 7 (permalink) Old 08-13-2019, 06:37 PM
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Quote:
Originally Posted by stave7119 View Post
Test the battery first. Make sure it is good, then the charging system. Batteries used to give us a warning before they went bad..... slow crank, hard starting cold and so on. But not any more. They can go bad at any time for no reason. I parked my car in the garage on a Saturday night and sunday morning it wouldn't go. Goofy lights lit up on the dash. Bad battery. Compact yard tractor did the same thing.

Must be something in the water down in Illinois?



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2019 Sportsman 850 SP Premium

Removed all Warning Decals
3500# Polaris Winch W/Synthetic Rope
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Kenda K587 HTR Bear Claws 26X9X14 & 26X11X14
Ultimate Series Windshield Fairing, Mid & Low Height Windshield
New Style Polaris Lock & Ride Rear Storage Box
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Built on March 27 2019
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post #6 of 7 (permalink) Old 08-14-2019, 05:42 AM
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Quote:
Originally Posted by Rhawkins3. View Post
I checked the voltage at 3000 rpm, registers 12.71 volts. Battery is good also. Not sure where/what to check next. Took it for a ride this afternoon and it ran fine.
Change the voltage regulator!!! They can act erratic, be fine one time and wreck havoc the next. Your voltage @3,000rpm should be between 13.5-14.5vdc!!! The VR is definitely bad!!

2011 Sportsman® 800 EFI
GURU front brush guard
GURU rear brush guard
Polaris front lock n ride cargo box
Polaris rear rack extender
Warn RT 3.0 winch w/amsteel synthetic line
Viper aluminum haus fairlead
Polaris front spring adjusters
Ricochet a-arm guards
Ricochet full frame skid plate
ITP T-7 beadlock 14" w/OMF inner rim guards
Maxxis big horn 2.0 26x9 front
Maxxis big horn 2.0 26x11 rear
QSC clutch kit
EPI HD springs front n rear
ODI rogue 130mm grips
Ultraseal commercial grade tire sealant (front)
Highlifter tire sealant (rear)
CTEK 3300 battery maintainer
added 7 zerks
beefed up wiring harness
OGIO rear bag
ROTOPAX 1gal. + 2gal. gasoline can
Jccapri bushing kit
Kolpin Over Fenders
Rigid Industries E-Series 10" flood
Walker Evans struts
NGK Iridium's (2,500 miles on Champion's and they looked great!)
Odyssey Extreme battery PC545

2018 Sportsman® 570-T
2019 Aluma® A8818
2020 Outlander® 1000R XXC (on order, ETA mid-Sept)
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post #7 of 7 (permalink) Old 08-14-2019, 08:39 AM
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Besides the rec/reg, check the AC volt output on the 3 alternator wires - should be above 30 volts at 2000 RPM

Shop Owner and Mechanic with over 50 years experience
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