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Donald
Donald, Small Engine Technician
Category: Small Engine
Satisfied Customers: 2146
Experience:  I have 25+ years of experience repairing 2 & 4 cycle engines
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Out of ideas. New carb, filter, plug and gas. Even changed

Customer Question

Out of ideas. New carb, filter, plug and gas. Even changed the coil. Still won't start. Runs if you put gas or starting fluid in carb. Any thoughts?
JA: Do you have fuel in the tank? If so, is the shut-off valve open and the fuel clean?
Customer: New fuel and no shut off
JA: Do you plan on doing the work yourself?
Customer: Would like to
JA: Anything else we should know to help you best?
Customer: Briggs and Stratton 675 on craftsmen pressure washer model###-##-####
Submitted: 11 months ago.
Category: Small Engine
Expert:  Donald replied 11 months ago.

Hello. Thank you for choosing Just Answer. My name is***** will be happy to assist you.

Expert:  Donald replied 11 months ago.

Have you checked to make sure you are getting a good, steady flow of fuel, from your fuel tank, to your carburetor?

Customer: replied 11 months ago.
line is clear
Customer: replied 11 months ago.
Any other thoughts?
Expert:  Donald replied 11 months ago.

Thanks for your reply. If your engine will only run briefly, if you spray starting fluid directly into your carburetor, then it is very likely that your carburetor is at fault, although it is new.

Customer: replied 11 months ago.
What would be the issue?
Customer: replied 11 months ago.
Or could be the issue. I cleaned before I installed to make sure all clear.
Expert:  Donald replied 11 months ago.

The main jet could still be clogged. The screw that secures your fuel bowl to your carburetor, is your main jet. It has three small holes in it. Did you clean these holes?

Expert:  Donald replied 11 months ago.

Please take a look at the image links below.

Expert:  Donald replied 11 months ago.

The images shows the holes in your bowl bolt ...

Customer: replied 11 months ago.
all clear I will double check
Expert:  Donald replied 11 months ago.

Use a small wire to clean these holes.

Expert:  Donald replied 11 months ago.

Also, clean the hole in the center of your carburetor, where your main jet screws into.

Expert:  Donald replied 11 months ago.

You can use a welding tip cleaner to clean this area, due to hole being larger.

Customer: replied 11 months ago.
Cleaned both. Still not starting.
Expert:  Donald replied 11 months ago.

Did you replace the gasket between your carburetor and your intake manifold?

Expert:  Donald replied 11 months ago.

How old is your engine?

Customer: replied 11 months ago.
Gasket is new and engine is roughly 10 years old. Only use about twice a year.
Expert:  Donald replied 11 months ago.

I am lead to believe that your carburetor is the problem. Another possibility is your intake valve may not be properly sealing.

Expert:  Donald replied 11 months ago.

Have you checked to see if your fuel cap is venting?

Expert:  Donald replied 11 months ago.

After you removed the fuel bowl from your new carburetor, did you notice any sediments in your fuel bowl?

Customer: replied 11 months ago.
I have not checked the cap. I will try that. I have not pulled the head to check valves or Pistons. will that slow fuel flow?
Customer: replied 11 months ago.
Fuel in bowl looked clean, no sediment.
Expert:  Donald replied 11 months ago.

If your fuel cap is not properly venting, it can restrict your fuel flow to your carburetor.

Customer: replied 11 months ago.
could new plug be faulty. Not much spark. And just checked gap.
Expert:  Donald replied 11 months ago.

I do not believe your spark plug is the issue. If it was causing our problem, the starting fluid would not cause your engine to start up briefly. Keep in mind that an engine needs three things in order to run. Fuel, Spark, and Compression.

Expert:  Donald replied 11 months ago.

Our problem is likely fuel or compression, rather than spark.

Customer: replied 11 months ago.
I did do a simple compression check with finger over plug hole. Don't have compression gauge to get exact.
Expert:  Donald replied 11 months ago.

I have purchased new carburetors that were bad straight from the box.

Expert:  Donald replied 11 months ago.

Carburetors are tested at the factory, and sometimes all fuel is not completely drained, or evaporated.

Customer: replied 11 months ago.
Can I keep question open. 10:00 here going in house will work on more tomorrow.
Expert:  Donald replied 11 months ago.

The residual fuel will eventually turn stale and cause carburetor issues, clogged jets and fuel passages. Yes, there is not a time limit on your question. We can continue tomorrow.

Customer: replied 11 months ago.
Thank you for the information. I will try more tomorrow. If anything else I will continue.
Expert:  Donald replied 11 months ago.

You are very welcome!