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!

Gas edger starting problems


daronson's Avatar
Member

Join Date: May 2002
Posts: 394
NJ

09-02-07, 07:24 AM   #1  
Gas edger starting problems

My Craftsman gas edger doesn't run well and has trouble starting. ocassionally it just quits. When I push the prime button it doesn't seem like the gasoline is going through the line. I took the air filter off and sprayed carb cleaner all through and reassembled and then it primes and starts. sometimes I can finish the job before it quits, other times it quits on me and I can't restart unless I re-spray the lines. Can it be gummed up? Do I need to take it in for repair or is there something else I can try?

Thanks.

 
Sponsored Links
jsouth's Avatar
Member

Join Date: Jul 2005
Posts: 205
TX

09-02-07, 12:06 PM   #2  
Post back your model number to see what type of engine you have,then we can go from there.

Jerry

 
daronson's Avatar
Member

Join Date: May 2002
Posts: 394
NJ

09-02-07, 12:36 PM   #3  
Craftsmen Model # 536.772321

3.5 HP w/ 9" Blade

Looks like the engine model# is 9G902-0145-D1

 
cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,569
GA

09-03-07, 12:59 AM   #4  
Sounds like you need to take the carb apart and clean it.


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

God bless!

 
geogrubb's Avatar
Member

Join Date: Jun 2006
Posts: 2,333
MO

09-03-07, 08:33 AM   #5  
When you clean the carb I would suggest replacing the diaphgram B&S part # 495770 or as a kit at Lowe's, I think it is number 583 or 586 which has the 495770 in it. Have a good one. Geo

 
puey61's Avatar
Member

Join Date: Apr 2004
Posts: 3,224
NY

09-05-07, 06:38 PM   #6  
The Sears site, per your posted chassis model number, should be a 9J902-0111). Where did you come up with the 9G... numbers? As Cheese and Geo indicated, you will need to service the carburetor/fuel tank to solve your troubles.

 
daronson's Avatar
Member

Join Date: May 2002
Posts: 394
NJ

09-08-07, 06:24 AM   #7  
I will look for the diagphram and/or kit at Sears first then Lowe's. One more question... The edger is only 2 years old, while your solution to service the carburator makes sense (May be gummed up) is it necessary to replace the diaphram? Just wondering why it would need replacement.

Thanks.

 
geogrubb's Avatar
Member

Join Date: Jun 2006
Posts: 2,333
MO

09-08-07, 08:57 AM   #8  
Although the trimmer is only 2 yrs old to you the carb could have set on the shelf for a long time before ever getting into the manufacturing cycle, also a little grit in the fuel system can eat a pinhole rather quickly. I received 4 mowers from a Wal-mart dumpster earlier this year, one had bad gas and the other three had bad diaphgrams and all were new, the paint was still on the blades, so it can happen. Have a good one. Geo

 
daronson's Avatar
Member

Join Date: May 2002
Posts: 394
NJ

09-08-07, 12:30 PM   #9  
I pulled the carb off and didn't seem like much I could do. I already sprayed all the lines with carb cleaner, which always helped the engine run for about 10-15 minutes until it conked out. The diaphram is simpley the gasket between the carb and the fuel tank, correct? Didn't look like anything was wrong with it, but I am an accountant!! Also I emptied out the old gas from the tank at the beginning of the season, that didn't help either.

This is a 2 Spring B&S Tank-mount Carburetor. Found a good diagram of my exact setup at the following website:
http://www.lawn-mower-shop.com/carb2.htm

I will still look for the diaghram or carb kit when I go out later today.

Thanks.

 
cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,569
GA

09-08-07, 10:52 PM   #10  
There is a diaphragm, AND a gasket between the tank and carb. The diaphragm should always be replaced when the carb is removed. They are a common source of problems on this engine anyway.


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

God bless!

 
daronson's Avatar
Member

Join Date: May 2002
Posts: 394
NJ

09-13-07, 09:03 AM   #11  
I picked up the diaphram (which includes a gasket) at Sears and am about to install. Is there any other "service" that should be done to the carb, or is the diaphram the most likely cause of the problem?

Thanks.

 
daronson's Avatar
Member

Join Date: May 2002
Posts: 394
NJ

09-13-07, 09:52 AM   #12  
Looks like the diaphram was bad. One important question... Do I use any kind of gasket adhesive/sealant on the new gasket, or just install???

 
puey61's Avatar
Member

Join Date: Apr 2004
Posts: 3,224
NY

09-13-07, 11:39 AM   #13  
No sealant is necessary. Just be sure to have the tank and carb surfaces clean before reassembly. About the only other area of concern with these carbs is the primer check valve. But it appears your is fine since you have not indicated it is not priming. Also, before reassembly, be sure to spray clean the entire carb and tank with carb/choke cleaner. A new air filter is recommended if you haven't done so already.

 
daronson's Avatar
Member

Join Date: May 2002
Posts: 394
NJ

09-13-07, 12:57 PM   #14  
PROBLEM SOLVED...THANKS TO ALL!!

Edger runs BETTER than the day I bought it!! Old Diaphram was clearly defective, may never have been seated properly.

Thanks again to everyone for your help!!

 
geogrubb's Avatar
Member

Join Date: Jun 2006
Posts: 2,333
MO

09-13-07, 04:25 PM   #15  
daronson; congrats on your fix, it's always nice to hear suscess.
You can become the B&S wizard for your neighborhood now, for that type carb setup, the diaphgram is the problem 99.9% of the time and yes they sometimes run better than when purchased because you never know how old and inflexable the original diaphgram has become. Have a good one. Geo

 
daronson's Avatar
Member

Join Date: May 2002
Posts: 394
NJ

07-24-11, 09:32 AM   #16  
New issue with edger...it starts, and cuts out after about 1 second. cleaned carb with carb cleaner, but didn't help. The primer button seems to be workig (I feel the pressure + it DOES start up initially) so figured it's NOT the diaphram again...Any suggestions?

Thanks.

Craftsmen Model # 536.772321

3.5 HP w/ 9" Blade

Looks like the engine model# is 9G902-0145-D1

 
cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,569
GA

07-24-11, 11:15 AM   #17  
Probably the diaphragm again.


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

God bless!

 
daronson's Avatar
Member

Join Date: May 2002
Posts: 394
NJ

07-31-11, 09:11 AM   #18  
Emptied out the gas tank, replaced with fresh gasoline, replaced diaphragm and gasket...still shuts off after about 1 second of running...

Any other suggestions?

Thanks,

 
cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,569
GA

07-31-11, 05:54 PM   #19  
Sounds like something related to the carburetor/diaphragm. Does pumping the primer help it keep running?


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

God bless!

 
geogrubb's Avatar
Member

Join Date: Jun 2006
Posts: 2,333
MO

07-31-11, 06:36 PM   #20  
Normal post'
You need to install a new diaphram kit, it is Briggs part # 795083 or old # 495770 also Lowe's has a kit #5083 which has the same parts.
Here we go;

Remove air cleaner, there are 2 bolts that hold things together, one on the front of the tank 3/8" and one into the block 1/2", remove these bolts, now "slowly" slide the carb/tank off the intake tube and breather tube, now tilt the tank in to release the throttle linkage and waalaa the carb/tank is removed. Check the intake tube to see if the O ring seal and plastic retainer are still on the intake tube, if so remove them and re-install them into the carb. Remove the 5 screws from the carb/tank remove carb(don't loose the spring) now spray all holes, cracks and crevases in both the carb and tank surface with brake parts cleaner, remove the main screen(looks like a thimble), now with a small screwdriver pry out the main jet(carefully) and clean it, check the O ring on the main jet for damage, if it is damaged it must be replaced, reinstall the jet, it can be difficult some times to get it to snap back in place(I use the rounded end of a screwdriver handle). Remove and clean the fuel pickup stem(not necessary if the fuel tank was clean). Clean any junk/rust from the tank. Install the diaphram on the tank then the gasket(no goo or sealer) now carefully replace the carb(the spring will try to misalign the diaphram), tighten all screws a little at a time so as not to crimp the diaphram until they are all tight. Install the carb/tank in reverse order and you are done. If I missed something one of the real mechanics will correct me. Have a good one. Geo
Some pics:



 
daronson's Avatar
Member

Join Date: May 2002
Posts: 394
NJ

08-21-11, 11:12 AM   #21  
Took the spark plug out and cleaned it, (may have inadvertently added gasoline mixed with oil... didn't know if i fouled the plug or not..)

pulled the diaphram off and checked all gaskets, sprayed carb with carb cleaner. ran for about 10 seconds, then shut off...then only runs about 1-2 seconds....When I pumped the primer right after it started, it would keep running. I was able to run the edger for about 10-12 seconds, until it wouldn't prime quick enough...

 
cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,569
GA

08-21-11, 12:30 PM   #22  
I'd guess that the carb base is warped and not holding the diaphragm in place, particularly between the screw holes on either side of the hole for the intake tube. You might fix it by using two gaskets instead of the one.


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

God bless!

 
daronson's Avatar
Member

Join Date: May 2002
Posts: 394
NJ

09-10-11, 08:31 PM   #23  
re-assembled with 2 gaskets...still does not stay running

 
cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,569
GA

09-11-11, 12:42 AM   #24  
Might be worth just replacing the carb. They're cheap.


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

God bless!

 
daronson's Avatar
Member

Join Date: May 2002
Posts: 394
NJ

09-11-11, 06:34 AM   #25  
From Sears? or search for carb by model # on internet?

 
cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,569
GA

09-11-11, 06:39 PM   #26  
Either. Sometimes Sears prices are quite reasonable, other times not-so-much. Check and see is all I can tell you.


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

God bless!

 
Search this Thread