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!

Briggs and Stratton 20Hp runs great without the air filters in place - not dirty


Andrew14's Avatar
Member

Join Date: Aug 2012
Posts: 3
MA

08-08-12, 03:03 PM   #1  
Briggs and Stratton 20Hp runs great without the air filters in place - not dirty

Briggs and Stratton 20Hp on craftsman lawn tractor runs great without the air filters in place and they don't seem to be dirty. It dies when the filters are in place and at high rpm's. Cleaned carb, changed oil, filter and plug.

Also, choke not opening when lever is released! New to all of this and wanting to learn. Thanks in advance to any good ideas.

 
Sponsored Links
Pilot Dane's Avatar
Group Moderator

Join Date: Mar 2003
Posts: 16,683
NC

08-08-12, 04:12 PM   #2  
Have you purchased new filters and tried them? Even if a filter looks clean it may not be allowing enough air through for the engine.

 
Andrew14's Avatar
Member

Join Date: Aug 2012
Posts: 3
MA

08-08-12, 05:30 PM   #3  
That was (one of) my plan(s), thanks. Other issue: what is supposed to allow the choke to reopen? I lower the lever from out of the choke position and it stays choked.

 
cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,567
GA

08-08-12, 07:04 PM   #4  
What engine?

if it's a single cylinder engine, change the choke shaft.


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

God bless!

 
mowerdude's Avatar
Member

Join Date: Oct 2011
Posts: 433
AR

08-08-12, 08:51 PM   #5  
Please add Model # and type # of Briggs engine.

 
Andrew14's Avatar
Member

Join Date: Aug 2012
Posts: 3
MA

08-17-12, 06:04 AM   #6  
Sorry so long in replying - been away. The tractor is a Craftsman 20Hp 42" mower (#917.276813). The engine is a Briggs (#31P977-0635-E1).

 
mowerdude's Avatar
Member

Join Date: Oct 2011
Posts: 433
AR

08-17-12, 06:32 AM   #7  
Fix the choke issue first,,,you may have dirt in the carburetor where the choke shaft rides, some times dirt build up in the hole where choke shaft mounts in carburetor. Make sure also you change out the Pra filter or clean it really good, also if you cleaned the air filter I have found sometimes all the soap used to clean it doesn't get all washed out and it will cause the carb to choke down, also make sure it is good and dry, but with that choke sticking it will continue to run sick untill it is fixed first. If choke is off have you tried a NEW air filter. Anyway that's my two cents worth,,good luck.

 
Search this Thread