Question about Black & Decker 19" Electric Lawnhog Mulching Mower with Rear Bag

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My mower will run if I hold the primer bulb in but if I let go it will stop. I cleaned the carburetor and replaced the primer bulb. My Craftsman mower engine serial number is 143964008.

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  • kpschamberge Mar 30, 2009

    My Craftsman mower will only run if I pump the primer bulbbut if I let go it will sputter and stop. I cleaned the carburetor and added carburetor cleaner to the fuel. It still does the same thing.

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Check out www.smallengineadvisor.com for trouble shooting & repair. it will help a lot

Posted on Jul 06, 2008

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Posted on Jan 02, 2017

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Craftsman yard vacuum only runs when choke is on


This is a common problem. If the machine has been stored with old gas than most likely a residue has formed in the fuel passages from the old gas as it evaporated. The fact that it will run with choke on is an indicator that the fuel passages have been restricted from the build up and the choke enriches the mix to compensate.

The first try would be to empty the fuel tank and replace the fuel with fresh gas. There are premix available at a premium price from Home Depot, Lowes and many others. This gas contains no ethanol one of the causes of the gum up problem. Just make sure that you choose a premix that is consistent with your machines gas/oil mix requirement.

By using the primer bulb the fuel is sucked through the carburetor. Cycle the fresh fuel by pumping the bulb until you finger hurts, To avoid flooding the machine attempt to start from time to time without choke. This would be to clear fuel collecting into the throat of the carburetor. The fuel usually does not flow directly into the throat of the carburetor when the engine is primed. The fuel is drawn through the tank filter through the fuel pump into the metering diaphragm and into the bulb and back to the tank. This effectively cleans out 90% of the carburetor. Sum of the residue should dissolve back into the fresh fuel. Try running again the machine. Running even with a partial choke will help to clean the remaining passages.

If the engine still requires choke a slight adjustment CCW to the mixture screws may be required. After some additional running you may need to adjust the mixture screw back as the fuel passages clean out.

Follow the storage procedure in your manual to prevent the problem in the future.

Nov 25, 2015 | Craftsman Garden

4 Answers

I have the Craftsman GT5000 24 OHV tractor lawn mower. It's been in storage for a while, I have replaced the battery, spark plugs, fuel filter, and oil. I can't get it to start. Does the engine have a pump...


Sounds like the carburetor needs a good ultrasonic cleaning as old gas will leave behind varnish and gum deposits clogging the carburetor fuel passages up.

Mar 29, 2015 | Craftsman Garden

1 Answer

My Craftsman Mowe rmodel# 917.376152 will not hold a prime?


This is a push mower. It does not have a fuel filter, so after about two years, small debris gets into the gas and then gets onto the carburetor. I added a small in-line filter to help. You will need to take the fuel line off and drain the fuel tank to flush then take the float bowl off and try clearing the passages with carburetor cleaner from the top down to flush. Reassemble and off you go.

Mar 04, 2012 | Garden

1 Answer

I have a craftsman 6.5 hp push mower that was givin to me i took the carb off and sprayed it with cleaner and put it back on and it ran for a few mins then the next day it wouldnt start what did i do...


Remove and clean the brass bolt that holds the bowl on the carburetor. It has about 3 holes, 2 near top and one in the bottom. Clean it with the carb/choke cleaner. Don't scrape it or force metal through the holes. Clean bowl, spray some cleaner up above where the brass bolt screws into the carb body and reinstall.

Sep 13, 2011 | Craftsman Garden

1 Answer

Toro 22" cut starts. to


a hole in the primer bulb or gas line it could be a pin hole right in the primer bulb itself and when you hold the bulb you might be holding the hole itself which keeps it running....

Jul 14, 2011 | Garden

1 Answer

I have a Craftsman chainsaw model 358.352160 and had to replace all my fuel hoses and filter. Now I can't get fuel to the carburetor and the primer ball will not pull fuel from the fuel tank.


Sounds like you have the hoses hook up wrong.

The hose from the tank goes to the bottom of the Carb. The line from the top of the Carb goes to the inlet side of the primer bulb (put your finger on one of the ports and push the bulb, if it collapses without returning then thats the inlet side). The outlet side of the bulb should go tank.

Good luck!

Jun 23, 2011 | Craftsman Garden

1 Answer

Must keep pushing primer bulb to keep mower running, need manual


The main suction jet in your carb. is blocked.Remove the bowl and push a thin needle up the centre jet in the carb and blow the jet out with compressed air. Stephen.

Sep 22, 2009 | Briggs & Stratton Garden

1 Answer

Gasoline smell


Hello:

The Usuall Cause for this is the Carburetor Needle Float Valve Not Seating Properly.
When this Happens, then Exhaust Valve is Slightly Open and the Gas Flows through the Intake to the Cylinder and then Out the Exhaust Valve to the Muffler.
Soak and Clean the Carburetor and Replace the Float Needle Valve.
>>The Following is a Basic File I Made for Cleaning Carburetors. Any Input is Appreciated. Even though the Carburetor Looks Clean, the Internal Passages May be Restricted with Varnish that Gas Causes to Build Up over Time.
>>Spray Cleaners Remove this Varnish in Layers, so Soaking is the Only Sure Way to Remove ALL this Varnish.
>>I Suggest you Make Sure the Gas is Free Flowing to the Carburetor Inlet Port (if the Model does Not have a Fuel Pump). If the Gas is Free Flowing to the Inlet Port, then
>>**Remove, Disassemble and Soak the Carburetor Overnight in Carburetor Cleaner (I Use Gunk).
>>The Primer Bulb is Held in Place with a Locking Collar at the Base of the Primer Bulb. Use a Small Flat Screw Driver and Carefully Pry the Lock Ring Up in Small Amounts All Around the Lock Ring until the Lock Ring and Primer Bulb can be Removed from the Carburetor Body. Usually a New Primer Bulb is Required when you have to Soak the Carburetor. The Rubber is Usually Rotted to Much for the Primer to be Reused.
>>Your Primer Bulb May Differ Slightly, but Removal is Usually Almost the Same Except for the Primer Bulbs that are Bolted to the Carburetor. These are Simply Unbolted and Changed with the new Primer Bulb.
>>I have Found that Most People can Use a Breakdown/IPL and Disassemble the Carburetor Enough for Proper Cleaning.
>>You Only have to Remove the Bowl (if Applicable), Float Pin (if Applicable), Float (if Applicable), Needle Valve and Needle Valve Seat if Applicable. This is a Flat O-Ring Located in the Inlet Port the Float Needle Rests in. Use a Strong Wire with a Slight Bend to Remove the Old Seat. Sometimes a Small Pocket Screw Driver can be Use Also.
>>The New Seat will have a Slightly Beveled Side and a Flat Side. The Flat Side goes Towards the Carburetor Body when Inserted into the Inlet Port. Spray the Seat with Spray Lubricant to make Installation Easier. The End of a Drill Bit that is Slightly Small than the Seat can be Use as an Insertion Tool.
>>Wear Gloves or Use a Rag when Handling the Sharpened End of the Drill Bit. Remove Any Adjustment Screws that Go Into the Carburetor Body. The Welch Plugs Do Not have to be Removed.
>>If you are Able to Remove and Disassemble the Carburetor and Keep the Gaskets Intact, then Usually these Gaskets can be Reused. Even the O-Ring Around the Bowl can be Reused if it is Not Broken. The Only Parts you May Need to Replace is the Float Needle Valve (and Seat if Applicable).
>>The Float Needle Usually is Not Replaced Unless it is Not Operating Properly (the gas flow not shutting off and the carburetor is Flooding). Do Not Remove the Main Nozzle. This is a Pressed Fit and Removal is Not Required for Cleaning. Soaking and Blowing the Carburetor Out After Soaking will Clean the Nozzle.
>>Once Disassembled, then Soak the Carburetor Body and Parts in a 1 Gallon Can of Gunk Carburetor Cleaner Overnight. The Can has a Parts Tray Inside it for the Small Parts.
>>Once the Carburetor and Parts are in the Cleaner, you can Replace the Lid for Safety and to Prevent Accidental Spillage. Then Blow Out the Passages with Compressed Air.
>>***(Do Not Use High Pressure Air for the Zama Carburetors, they have Check Valves for the Primer and these are Usually Blown Out of the Carburetor if Not Careful. Allow the Zama Carburetor to Set on a Drip Pan and Dry)***.
>>****All the Carburetor Adjustments are the Same for Lawn Mower and Trimmers. There are Several Location for the Air Mixture Screws. The Idle Air Mixture Screws are Usually Located at the Top of the Carburetor Bowl and the Top of the Carburetor Body.****
>>If the Main Air and Idle Air Mixture Screws are Side by Side on the Side of the Carburetor, then the Idle Air is Nearest the Engine. The Main Jet Air Mixture Screw is Located in the Bottom of the Carburetor Bowl or Beside the Idle Air Screw on the Side of the Carburetor Body.
>>Some of the Older Model Carburetors have the Main Jet Mixture Screw Straight in from the Top of the Carburetor Body (this is Rare anymore). If you have Cleaned the Carburetor (Disassembled and Soaked Overnight in Carburetor Cleaner (I Use Gunk). Then Blow Out the Passages with Compressed Air and Install a New Kit if Required. Now Setting the Air Mixture Screws:
>>****Turn the Idle Air and Main Air Mixture Screws In Until SNUG **Do Not Jam** Then Reverse Both Screws 1 1/2 Turns. Holding the Throttle Full Open, Start the Engine. Turn the Main Air Mixture Screw Clockwise Until Proper Revs are Obtained. Occasionally you May have to Turn this Counter Clockwise to Achieve the Proper Revs. Now Allow the Engine to Idle. Set the Engine Idle Screw (Not Idle Air) so the Engine will Stay Running if Required. Now Set the Idle Air Mixture Screw so there is No Hesitation when Throttling from Idle to Full Throttle. Reset the Engine Idle if Required.****
>>If This Carburetor has a Single Air Adjustment (Except Tank Mounted 9200 and 100900 Engine Model Carburetors), Use the Section Above that Pertains to Full Throttle RPM Air Mixture Screw and then Adjust the Screw if Required to Eliminate Any Hesitation when Throttling from Idle to Full Throttle.
>>For the 9200 Model Tank Mounted Carburetor Adjust the Air Mixture Screw Full In, then Reverse 1 1/2 Turns. Set the Throttle Lever to Full Throttle and Start the Engine.
>>Now Carefully Use 1 Finger and Open the Throttle Plate and Over Rev the Engine Slightly. If the Engine Over Revs and Does Not Struggle to Over Rev, then the Carburetor is Set. If the Engine Struggles to Over Rev, then Turn the Adjustment Screw In 1/4 Turn and Repeat the Over Rev Test.
>>If you Adjust to 1/2 Turns In and the Engine Still Struggles to Over Rev, then Return the Adjustment Screw to 1 1/2 Turns Out from Snug and Turn the Screw Out 1/4 Turn. Do the Over Rev Test. Continue this Process Until you have the Engine Over Revving without Struggle.
>>By Adjusting the Carburetor on this Style Carburetor Until the Engine Over Revs without Struggle, you have Adjusted the Air Mixture to the Best Possible Setting.
>>This file was Intended to Give you the Basic Carburetor Cleaning Instructions and May Not Reflect Your Carburetor Components.
>>If you have Questions, Please Ask. The links above Provide Good Directions on Cleaning the Carburetor. Make sure you use an Compressed Air to Blow through all the Carburetor Passages to make sure they are Clear.
>>1- http://www.repairfaq.org/samnew/lmfaq/lmclctc.htm
>>2- http://www.cpdonline.com/692509.pdf .
Please, Do Not Hesitate, If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

May 07, 2009 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer

Possible carburetor problem? Mower runs for


i have a lt 1000 2005 when i start it with cold engine it boggs for a minute then it starts to run smoothly please help me

Apr 19, 2009 | Craftsman Garden

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