Craftsman Snowblower Only Runs On Choke - General DIY Discussions - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > DIY Repair > General DIY Discussions

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 03-29-2009, 05:30 PM   #1
Newbie
 
Join Date: Mar 2009
Posts: 2
Rewards Points: 10
Default

Craftsman Snowblower only runs on choke


So my craftsman model #536.881800 snowblower was only running on choke. As soon as I switch it over to run it would stall. I noticed that the bar to govern would engage and kill the engine. This started during this snow season and I want to get it fixed before I store it this year.

I removed the Carb and cleaned it up with carb cleaner, but that has not helped at all.

After I pulled the carb it would not start at all, so I pulled the spark plug out and put a tablespoon on gas in there. It started up but will still only run on choke. Spark Plug looks good and was replaced about a year ago.

There was no varnish in the carb and the gas is fresh and it has always been stored with fuel stabilizer in it.

It has a Briggs and Stratton carb with the number 21473 stamped on it. Anyone have any suggestions?

Advertisement

tjm0852 is offline   Reply With Quote
Old 03-29-2009, 05:36 PM   #2
Member
 
Tom Struble's Avatar
 
Join Date: Dec 2008
Location: west milford n.j.
Posts: 2,785
Rewards Points: 2,000
Default

Craftsman Snowblower only runs on choke


i would get a carb kit with the diaphragm and a new plug
check the float mak sure its not heavy with fuel

Advertisement

Tom Struble is offline   Reply With Quote
Old 03-29-2009, 05:42 PM   #3
Newbie
 
Join Date: Mar 2009
Posts: 2
Rewards Points: 10
Default

Craftsman Snowblower only runs on choke


The float is not filled with fuel. I took it apart and shook it, it is empty.

What do you mean by diaphragm? I have the parts break out but do not see anything called a diaphragm.
tjm0852 is offline   Reply With Quote
Old 03-29-2009, 10:13 PM   #4
Member
 
Tom Struble's Avatar
 
Join Date: Dec 2008
Location: west milford n.j.
Posts: 2,785
Rewards Points: 2,000
Default

Craftsman Snowblower only runs on choke


sorry your carb may not have one,i would try a carb overhaul kit but you should be aware that there are some carbs that have tiny passages that can be very difficult to clean,you could also have leaking welch plugs some carbs are just easier to replace

im not a small engine mechanic just a tinkerer so please wait for a real mechanic to help you with this good luck
Tom Struble is offline   Reply With Quote
Old 03-30-2009, 04:14 PM   #5
Old School
 
Willie T's Avatar
 
Join Date: Jan 2009
Location: St. Petersburg, FL Minds of moderate caliber ordinarily condemn everything which is beyond them.
Posts: 3,634
Rewards Points: 2,000
Default

Craftsman Snowblower only runs on choke


This may help point you in the right direction.


http://www4.briggsandstratton.com/mi...ence_Guide.pdf
__________________
"True eloquence consists in saying all that is necessary, and only that which is."
François Duc de La Rochefoucauld
Willie T
Willie T is offline   Reply With Quote
Old 03-30-2009, 04:31 PM   #6
Licensed P.E./Home Insp
 
Aggie67's Avatar
 
Join Date: Dec 2008
Location: New Jersey
Posts: 587
Rewards Points: 500
Default

Craftsman Snowblower only runs on choke


If everything else is cleaned like you state (no jets clogged, etc), then what's going on is the motor is being starved of fuel when you turn the choke off. Choke enriches the fuel/air mix. But if you had a situation where the motor was drawing in excess air, shutting off the choke will lean out the mix to the point where it stops igniting.

I'll bet you a sandwich that you need to replace the gasket between the carb and the manifold. You might be getting excess air in there after the carb, so the mix is unnaturally lean. This happened on my B&S 10hp pressure washer last spring. Once I replaced the gasket, it ran factory fresh. But if you're doing that, you might as well replace the jets. It takes 5 minutes.

Also, my fuel needle had two stages of jets, so inside the carb at the unchoked vacuum level it was pulling fuel through a lower set of jets, and in choke it pulled more fuel through another set of jets higher up the needle. If your carb was like my B&S, then maybe your lower jets are clogged, and the other ones aren't.

Last edited by Aggie67; 03-30-2009 at 04:35 PM.
Aggie67 is offline   Reply With Quote
Old 04-12-2010, 09:48 PM   #7
Newbie
 
Join Date: Aug 2008
Posts: 1
Rewards Points: 10
Angry

Craftsman Snowblower only runs on choke


I purchased the craftsman model 536.881800 8 Horsepower Snow Thrower mainly due to the fact that it had a Briggs engine on it. I also purchased a Craftsman lawn mower and riding tractor at the same time because of the same reason. I had significant problems with my lawn mower engine last year resulting in a $100 repair bill due to some faulty carburetor issues and now my snow thrower keeps stalling out. I have taken extremely good care of these items draining and running till empty, using fuel stabilizer, winterizing or summerizing as the case may be. These products are also less than 5 years old. After having years of good experience with Briggs & Straton engines most of those having had zero preventive maintenance I am totally disappointed with my recent experiences and with what I have been reading regarding carburetor rebuild kits, etc.

Briggs is certainly not what I remember it being and I will never purchase another Briggs product again, although the competition is most likely no better. Sears will obviously do nothing, so I am stuck with $2000 worth of junk.
dcsanf is offline   Reply With Quote
Old 04-15-2010, 10:27 AM   #8
Coconut Pete's paella!
 
CoconutPete's Avatar
 
Join Date: Jan 2010
Location: Charlotte, NC / Denmark
Posts: 1,318
Rewards Points: 500
Default

Craftsman Snowblower only runs on choke


Quote:
Originally Posted by Aggie67 View Post
If everything else is cleaned like you state (no jets clogged, etc), then what's going on is the motor is being starved of fuel when you turn the choke off. Choke enriches the fuel/air mix. But if you had a situation where the motor was drawing in excess air, shutting off the choke will lean out the mix to the point where it stops igniting.

I'll bet you a sandwich that you need to replace the gasket between the carb and the manifold. You might be getting excess air in there after the carb, so the mix is unnaturally lean. This happened on my B&S 10hp pressure washer last spring. Once I replaced the gasket, it ran factory fresh. But if you're doing that, you might as well replace the jets. It takes 5 minutes.
I will not quite bet you a sandwich, but i'll bet you my best hat this is the answer haha.
CoconutPete is offline   Reply With Quote
Old 04-15-2010, 02:29 PM   #9
Member
 
Join Date: Jul 2008
Location: NW of D.C.
Posts: 5,990
Rewards Points: 2,000
Default

Craftsman Snowblower only runs on choke


Quote:
Originally Posted by Willie T View Post
This may help point you in the right direction.


http://www4.briggsandstratton.com/mi...ence_Guide.pdf
You can add 'partially clogged high speed jet' to table #14.
Yoyizit is offline   Reply With Quote
The Following User Says Thank You to Yoyizit For This Useful Post:
Tom Struble (04-16-2010)
Old 04-16-2010, 05:59 PM   #10
Household Handyman
 
Join Date: Feb 2009
Location: Albany, Ga.
Posts: 2,294
Rewards Points: 1,040
Default

Craftsman Snowblower only runs on choke


Errrr-have you tried to see if it will continue to run IF you spray WD-40 at the gasket where the carb unit attaches to the motor? Sure fire test for a leaking gasket at that area. Then if it does run--make Pete a sandwich. David

Advertisement

Thurman 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
runs and sanding oscarMadison Painting 1 02-24-2009 06:46 AM
Craftsman snowblower model # 536.918200 ttocsnosretep Automotive Repairs 1 12-19-2008 10:38 PM
PEX Manifolds: home-run to each fixture vs grouping runs? drh Plumbing 3 04-02-2008 04:44 PM




Top of Page | View New Posts