Welcome to the DoItYourself Forums!

To post questions, help other DIYers and reduce advertising (like the one on your left), join our DIY community. It's free!

High RPM cut out


stevewallace's Avatar
Member

Join Date: May 2008
Posts: 4
CA

05-31-08, 11:06 PM   #1  
High RPM cut out

I have a Honda 4 stroke gx25 on my weed whacker. It idles and starts great but when running at high RPMs it will die. It does it cold or hot, and will restart immediately. Sometimes cold it will run for a few minutes. I took off the carb and cleaned it out, it looked great and I could see no visible problems. I also put in a new spark plug and fresh gas. What am I missing? I appreciate any suggestions.
Steve.

 
Sponsored Links
stevewallace's Avatar
Member

Join Date: May 2008
Posts: 4
CA

06-01-08, 08:27 PM   #2  
Come on guys, I need your help here.

 
cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,574
GA

06-01-08, 08:53 PM   #3  
When you re-start it, how long does it run before dying again? Does it shut off dead cold like it was switched off, or does it wind down like it is running out of gas?


"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

God bless!

 
stevewallace's Avatar
Member

Join Date: May 2008
Posts: 4
CA

06-06-08, 10:00 PM   #4  
It will restart immediately with 1 pull but cut off within a few seconds when under full RPM. It cuts out fast and cold unless I let off on the throttle then it will idle forever. Like its either starving for gas or flooding. There are no adjustment screws to play with.

 
bontai Joe's Avatar
Member

Join Date: Apr 2004
Posts: 592
PA

06-07-08, 07:14 AM   #5  
What does the air filter look like? Need replacing? I'm thinking that it may not be getting enough air at high rpms.

 
Gunguy45's Avatar
Super Moderator

Join Date: Dec 2007
Posts: 20,666
AZ

06-07-08, 07:38 AM   #6  
Not sure, but is there a fuel filter? Pro's?


Vic
"I sometimes wonder how some people ever made it to adulthood..."

 
stevewallace's Avatar
Member

Join Date: May 2008
Posts: 4
CA

06-08-08, 12:10 AM   #7  
Air and fuel filters are OK. I even tried running without them and no change. NEXT?

 
cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,574
GA

06-08-08, 08:35 PM   #8  
Sounds to me like there may be a piece of trash pulling up into an orfice at full rpm, or a partially restricted strainer in the carb if the carb has a strainer screen.


"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

God bless!

 
Search this Thread