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engine model XXXXXXXXXX B1 starts but after a period of mowing,

Customer Question
especially up hill engine dies...
engine model XXXXXXXXXX B1 starts but after a period of mowing, especially up hill engine dies. Let sit for a period (normally 10 minutes but recently had to wait overnite) and engine starts right away. Frequency of stalling has increased.

Mower is a Craftsman purchased 3-4 years ago.

Thanks R Fogle
Submitted: 10 years ago.Category: Small Engine
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Answered in 1 hour by:
9/8/2012
Technician: lwwade, Small Engine Technician replied 10 years ago
lwwade
lwwade, Small Engine Technician
Category: Small Engine
Satisfied Customers: 117
Experience: I have worked on small engines for over 30 years,and i have had my on shop for the last 10 years.
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lwwade :

hi let me see if i can help, in your question it is not showing the model number, so does your unit have a fuel pump are is it gravity feed for your gas supply, there are two thing i would check when this happens 1. when it dies, check to see if your still getting fire to the spark plug, this will show if this is a electrical problem (coil going bad ect.) 2. disconnect fuel line to make sure your are getting fuel to the carb,if this unit has a fuel pump (rear tank under seat) you will have to crank the engine over to see if your getting good fuel flow, if both or good then the problem would be in the carb itself, either fuel solenoid sticking are trash in the fuel bowl that gets pulled into the carbs main jet, settling back in the fuel bowl after setting awhile. in turn letting the engine start again, also if you have a gas tank under the seat it is possible that you fuel line is getting old and coming apart in the inside of the line itself, causing fuel line to collapse, if this fuel line has never been changed this is a good possiblity. hope this helps

Customer:

model is XXXXXXXXXX /p>

lwwade :

your model number is XXXXX showing xxxxxxxxx/p> ? not sure of the problem

Customer:

Model no. three three one seven seven seven zero nine four six

lwwade :

ok your engine has a nikki carb on it, did you check the fuel solenoid to see if it is sticking,to do this unplug the wire at the bottom of the carb, take a 1/2 inch open end wrench and unscrew the solenoid see it the plunger moves up and down freely,if not use carb cleaner and compressed air to clean, before reinstalling plug the wire back up turn the key switch to on (not start) and see if the plunger goes in, the turn the key back off plunger should come back up, if it does this then the fuel solenoid is working fine while your there check carb bowl to make sure you do not have trash in the bowl this would also cause your problem, if all of this is good, then your problem will be electrical, so when this happens check to make sure your still getting strong fire to the plug, try this and let me know what you find,

Customer:

Thanks, XXXXX XXXXX Have already checked spark.....it's OK.

lwwade :

ok let me know what you find

lwwade
lwwade, Small Engine Technician
Category: Small Engine
Satisfied Customers: 117
Experience: I have worked on small engines for over 30 years,and i have had my on shop for the last 10 years.
Verified
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lwwade, Small Engine Technician
Category: Small Engine
Satisfied Customers: 117
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Experience: I have worked on small engines for over 30 years,and i have had my on shop for the last 10 years.

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