Need help with 850 overheating - Page 2 - Polaris ATV Forum
ATV Repair and Maintenance Having problems? Doing a rebuild? All Repair/Maintenance Discussions here.

LinkBack Thread Tools Display Modes
post #11 of 13 (permalink) Old 03-31-2019, 05:50 PM Thread Starter
ATV Enthusiast
BlackX's Avatar
Join Date: Feb 2013
Location: Ft Worth, Texas
Posts: 33
Attached Thumbnails
Click image for larger version

Name:	AD8BCB8C-13DD-4472-9062-9C81FD55028C.jpeg
Views:	9
Size:	753.6 KB
ID:	117065   Click image for larger version

Name:	92F4F341-4977-419E-AC3E-CF2CD892A3C6.jpeg
Views:	9
Size:	826.1 KB
ID:	117067  

2013 850 Touring HO EPS, 6” Highlifter, 34” Intimidators, Rad Relo, Stealth Snorkel
2012 850 XP LE EPS 6” Highlifter, 32” Intimidators, Triangle Stealth Snorkels
SOLD–'17 Outlander XMR 1000, 6” Catvos, Turners, 32” Terms
SOLD–‘13 Ranger 900 XP EPS, 5" S3 lift, 29.5" Terminators
SOLD–'12 CMMDR X, 6" Catvos, Gorilla Axles, 32" Terms
SOLD–'06 Rhino 660, 6" Gorilla Lift w/ axles, 27" Mega Mayhems
SOLD–'05 Sportsman 700 Twin, 2" SuperATV Lift, 30" MudLites
Working overtime to pay for it all!
BlackX is offline  
Sponsored Links
post #12 of 13 (permalink) Old 03-31-2019, 07:34 PM
Polaris ATV Legend
latebird's Avatar
Join Date: May 2014
Location: Illinois
Posts: 3,378
Originally Posted by BlackX View Post
Hey Latebird. Thanks again for input. Are you a mechanic by trade or just have good exposure?
I guess I failed to see this post - I do not have great experience with the 850, so I just scan the posts and only answer when I think I might have a good suggestion.

I am a mechanic by trade - I have run an independent repair shop for over 40 years. I work on most makes and models, but I'm nearly 70 years old and I'm slowing down a bit. I'm not taking all jobs any more. I will not take the engine out of a Gold Wing, Harley or any other big bore street bike. I turn away all fuel injection problems, but I relish most electrical problems. My son is a general contractor. I fix his bike and he fixes my home and shop. I worked 25 years as a maintenance supervisor in a steel siding/roofing roll forming manufacturing plant. I have a degree in electronics, grew up on a farm and managed a Montgomery Ward store for 4 years, not in that order and that is not my complete resume.
indyred570 likes this.

2006 Trailboss 330
2002 Sportsman 90
2005 TRX400EX (FOR SALE)
2003 LT-Z400 (needs engine work & is for sale)
2004 CRF250X
1971 Triumph 650 Bonneville (has 5 original miles)
1972 Triumph 650 Bonneville (undergoing restoration)
1979 Honda CBX (6 cylinder)
1970 Kawasaki G3SS 90cc Bushmaster
1976 Suzuki RE5 Rotary (not running & FOR SALE)
1981 Kawasaki KZ305-A
1981 Suzuki GS450T (undergoing repair & will be for sale when done)
1982 Kawasaki KZ750-H (FOR SALE)
1989 Honda VT1100C
2007 Vectrix VCTX Electric Scooter
1965 Montgomery Ward 3 1/2 HP Tecumseh Mini Bike
1970 Triumph T25 250cc Trailblazer
1968 Triumph 250cc Flat Tracker

Shop Owner and Mechanic with over 50 years experience
latebird is offline  
post #13 of 13 (permalink) Old 04-01-2019, 04:12 AM
polman500's Avatar
Join Date: Nov 2009
Location: SE Kentucky
Posts: 7,570
Originally Posted by BlackX View Post
Op, from your description, it sure sounds to me like either the fan breaker or relay or possibly an ECU issue. I saw where you said you replaced the breaker... You sure you got the right one? Sounds just like a RZR I worked on recently. It would cool/fan cycle perfectly while sitting or just cruising easy but when you got the machine under load for a few minutes the breaker would start overheating and couldn't keep up causing it to eventually overheat.

It sounds to me like you've covered all the mechanical/physical stuff. I'd first make sure the fan breaker and relay and the connections to them are good. If no joy there, I'd look into a ECU reflash. That could possibly correct the other codes you're getting too?
polman500 is offline  

  Lower Navigation
Go Back   Polaris ATV Forum > Polaris ATV Technical Discussions > ATV Repair and Maintenance

Quick Reply

Register Now

In order to be able to post messages on the Polaris ATV Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
Over voltage Keith338 ATV Repair and Maintenance 28 12-20-2018 09:43 AM
Top end crankcase Masterbreaker101 ATV Repair and Maintenance 3 11-30-2018 11:59 AM
Shock interchange TDMax Polaris XP 7 07-13-2016 05:21 PM
Buddys 850 XP overheating CB73 Polaris Sportsman 6 05-15-2016 09:55 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome