97 Big Bear 350 hard to start in cold weather - Grizzly Riders - Yamaha Grizzly ATV Forum

 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 12-10-2016, 02:28 PM Thread Starter
New Member
 
Join Date: Dec 2016
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
97 Big Bear 350 hard to start in cold weather

I bought this a few years ago, rebuilt carburetor, new needle and seat, adjusted float height, idle air screw set at approx 2.5 turns. New fuel cock, inline fuel filter, valve clearances checked, air filter replaced, excellent compression. Starts great in warm weather, when down to 20 deg F or below, can be very difficult to start. I took the carb off the other night, found the intake pipe cracked at the corners, replaced with OEM, and new oring. Reinstalled everything, starts fine in garage but I notice when it is running I can pull the choke out fully the engine does not die out like I think it should. Does anyone else have this issue? I removed the choke control, oring looked fine, cleaned out the ports for the choke again with carb cleaner. Same result. The maintenance manual I have is very vague on this. Currently parked in the garage with the snow plow attached because I can't be sure it will start when cold in the barn. Any help much appreciated.
pcheffernan is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 11-10-2017, 12:54 PM Thread Starter
New Member
 
Join Date: Dec 2016
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Still having same issues, took the carburetor apart again, no dirt found, verified all settings. Tried enriching the idle air screw, to no avail. I can adjust to where it runs great , then leave it outside on a cold night and it will not start. Beyond frustrated with this thing. Going to replace NGK D8EA spark plug with E3-36 plug to see if that helps. The plug looks wet so I'm assuming it is not carburetion but more ignition.
pcheffernan is offline  
post #3 of 4 (permalink) Old 11-11-2017, 04:43 PM
League of Extraordinary Grizzlymen
Site Supporter
 
Grumpy's Avatar
 
Join Date: Feb 2011
Location: Dayton, Nevada
Posts: 2,122

Thanks: 411
Thanked 600 Times in 476 Posts
Garage
How frustrating. Sure wish I knew what to suggest.

~SOLD 2019~

*-::-* Silver 2011 Yamaha Grizzly 700 FI / EPS Special Edition *-::-*

JBS Hotrod Sheave, 16GR Weights and a Purple Secondary Spring
Black 12" Diablo Beadlocks with 26.5" Pit Bull Growlers
Warn XT-30 Winch w/ Wireless Remote
Moose Front & Rear Bumpers
Rage Customs Rock Sliders
Ricochet Full Skid Plates
Garmin Montana 610T
Maier Hand Guards
Plano 1510 Box

Rigid D2's
RotoPax
Grumpy is offline  
 
post #4 of 4 (permalink) Old 11-16-2020, 12:28 PM Thread Starter
New Member
 
Join Date: Dec 2016
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
I'm still having same problems. I have an E3 spark plug in it. New battery, cranks but won't start in cold. I spray just a bit of fuel into air cleaner, and fires up almost immediately. Has anyone ever put a primer on these machines to start easier? I was thinking like a squeeze bulb primer, but not sure.
pcheffernan is offline  
Reply

Bookmarks

Tags
350, bear, big, cold, hard, start, weather

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Grizzly Riders - Yamaha Grizzly 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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


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

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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