1988 Big Bear 350 - wont fire - ATVConnection.com ATV Enthusiast Community

Yamaha Discussions about Yamaha ATVs.

Thread Tools Search this Thread
Old 08-31-2012, 07:00 AM
Weekend Warrior
Thread Starter
Join Date: Aug 2012
Posts: 3
Default 1988 Big Bear 350 - wont fire

Hello all, I need some advice from the experts!

I just picked up a 1988 big bear 350 a few days ago, it was too cheap to not pick up.

The pull start was broken so I could not see if it ran or not. But the motor was not locked up.

I got it home and fixed the pull start, motor turns over and it does not even try to fire.

I checked the spark, the spark plug is definitely getting spark.

So I checked the compression, I am getting about 150 PSI, from my research that should be fine.

So I took the Carb off, I am going to clean it and see if that helps.

I guess my question is, one...what else can I check?
Also, before I took the carb off, when I would flip the fuel switch on, gas would flow out of the carb into the airbox pretty rapidly which I thought was odd.

It seems as if no gas is getting into the motor from the carb, it is all just flowing straight into the airbox.

Any insight? Would this be a stuck or clogged jet? Or would it have to do with the float?
Reply With Quote
Old 09-05-2012, 07:52 PM
Weekend Warrior
Thread Starter
Join Date: Aug 2012
Posts: 3


I took the carb off and tore it apart, gave it a thorough bath in carb cleaner.
Then I put it all back together and shot a little starter fluid in the carb, fired on the first pull. Then after I ran it for a little while it runs like a champ now.

Must have been clogged and needed to run for a bit.
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
2005 Yamaha big bear 400 4X4 Ean Yamaha 6 04-14-2016 10:51 PM
DS770 First Fire Up MRDS650 CAN-AM (BRP) 8 01-04-2016 09:57 PM
LT230s DG nerf Bars for a LT250s? Valder Suzuki 2 09-03-2015 08:44 AM
Sportsman 400 strut bearing lubrication 79hugger Polaris 5 08-30-2015 03:21 PM
Fire retardant material? toonces Buying an ATV 4 07-24-2015 10:03 AM

1988 , 350 , 88 , airbox , bear , big , cylinder , filling , fire , gas , hunting , psi , time , wont , yamaha

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off

All times are GMT -5. The time now is 02:21 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: