Go Back   GZ 250 Forums > GZ250-Specific > Troubleshooting

Reply
 
Thread Tools Display Modes
Old 05-30-2017, 04:21 PM   #1
viking79
Junior Member
 
Join Date: May 2017
Posts: 5
GZ250 Won't Start

Hello, I am new to this forum and have a GZ250 that suddenly won't start after winter.

Things I have done:
Drained the fuel, replaced with 1.5 gallons of fresh fuel.
Checked spark (spark is good).
Starts and stays running with starter fluid (actually MAF cleaner), dies as soon as I stop spraying.
Does not start with fuel in "pri" position (nor other positions).
Removed and cleaned out some passages in carb, no help, but didn't take it very far apart, just took the bowl off and removed the jets and blew compressed air through the passages.
If fuel set to "pri" airbox will fill with fuel and drain out bottom
Fuel drains from bottom of carb if I open the bowl screw.

Any thoughts on how to trouble shoot this? If the petcock is bad it should still run in "pri" right? It doesn't seem like it should leak fuel out the air box in this position, or is that normal? Seems like a carb or maybe fuel delivery issue.

Thanks!

Eric



Login or Register to Remove Ads

Last edited by viking79; 05-30-2017 at 04:23 PM.
viking79 is offline  
Reply With Quote
Old 05-30-2017, 05:07 PM   #2
derbydave
Senior Member
 
derbydave's Avatar
 
Join Date: Jan 2017
Location: KS
Posts: 103
Sounds like you have a gummed up primary jet. The primary jet is on the bottom side of the carb under a brass cap that needs to be drilled out to access it. It also sounds like your float is not adjusted properly or the needle and seat is not sealing.
__________________
2003 Suzuki GZ250 (Sold)
1986 Suzuki Cavalcade LXE
1986 Suzuki Intruder VS700
derbydave is offline  
Reply With Quote
Old 05-30-2017, 06:28 PM   #3
Water Warrior 2
Senior Member
 
Join Date: Dec 2006
Location: Squamish B.C Canada
Posts: 11,409
Any time your bike is parked for an extended time you should use Stabil in a fresh tank of gas. Run it for a short time to get the mixture into the carb. You shouldn't have anymore problems with the carb getting gummed up and hard to start.



Login or Register to Remove Ads
Water Warrior 2 is offline  
Reply With Quote
Old 05-30-2017, 07:32 PM   #4
blaine
Senior Member
 
blaine's Avatar
 
Join Date: Feb 2010
Location: P.E.I. Canada
Posts: 3,784
Quote:
Originally Posted by Water Warrior 2 View Post
Any time your bike is parked for an extended time you should use Stabil in a fresh tank of gas. Run it for a short time to get the mixture into the carb. You shouldn't have anymore problems with the carb getting gummed up and hard to start.
I found SeaFoam to be better than Stabil.....I use it once a month & always in a full tank of fuel when storing for winter.
__________________
If at first you do succeed, try not to look surprised.


blaine is offline  
Reply With Quote
Old 05-30-2017, 08:13 PM   #5
viking79
Junior Member
 
Join Date: May 2017
Posts: 5
Thanks, I will take the carb off and look for that primary jet. Once I drill off the cap, how do I replace that (maybe it will make more sense when I get it apart, any link to procedure?) Also, anything about how to adjust float? Haven't actually done one before

Yes, will use stabil or seafoam or similar this time, didn't drive it much last year so fuel was pretty old.

Eric



Login or Register to Remove Ads

Last edited by viking79; 05-30-2017 at 08:16 PM.
viking79 is offline  
Reply With Quote
Old 05-30-2017, 08:22 PM   #6
viking79
Junior Member
 
Join Date: May 2017
Posts: 5
Okay, looking at generic carb view, the float closes the needle valve and stops fuel from flowing in, since fuel leaks through on prime position, might not be sealing right?
viking79 is offline  
Reply With Quote
Old 05-31-2017, 01:32 PM   #7
Water Warrior 2
Senior Member
 
Join Date: Dec 2006
Location: Squamish B.C Canada
Posts: 11,409
Quote:
Originally Posted by blaine View Post
I found SeaFoam to be better than Stabil.....I use it once a month & always in a full tank of fuel when storing for winter.
Perfect. A friend of mine swears that Seafoam is the best thing since sliced bread. He has used it to treat carbs with the Seafoam spray can just by spraying into the carb throat.
Water Warrior 2 is offline  
Reply With Quote
Old 05-30-2017, 09:16 PM   #8
derbydave
Senior Member
 
derbydave's Avatar
 
Join Date: Jan 2017
Location: KS
Posts: 103
Two excellent videos on carbs



__________________
2003 Suzuki GZ250 (Sold)
1986 Suzuki Cavalcade LXE
1986 Suzuki Intruder VS700
derbydave is offline  
Reply With Quote
Old 05-30-2017, 10:19 PM   #9
viking79
Junior Member
 
Join Date: May 2017
Posts: 5
Thanks! It was the float and needle. The float wasn't engaging the needle at all so it wouldn't close and I imagine it was flooding immediately. I bent the tab slightly on the float so it could close the needle. I almost wonder if a part is missing. I will go watch those videos you posted. Thanks again, Eric
viking79 is offline  
Reply With Quote
Old 05-30-2017, 11:18 PM   #10
viking79
Junior Member
 
Join Date: May 2017
Posts: 5
Great videos, looks like I might need to take the float off again and adjust to spec, and I think the sudden change is that the damper in the needle valve is not working so it stopped closing.

Eric
viking79 is offline  
Reply With Quote
Reply



Thread Tools
Display Modes

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

Forum Jump


All times are GMT -4. The time now is 07:08 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.