Question about Generac Power Systems Generac 0057890 3250 Watt Gasoline Generator

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I have a 3250 watt Kingcraft generator that won't

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John Trevino

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Always troubleshoot with new sparkplug. Remove the oil sending unit connection from the coil. The coil should work without any wires connected. Usually the only connections are oil sending unit that will short to ground when low oil condition and other wire must be kill wire to on/off switch. Use carb cleaner spray directly into the carb with air filter removed and choke off as fuel supply. Just a short spray and another short spray after a couple of pulls. If engine wants to start you will need to keep spraying cleaner for engine to continue to run. If engine wants to run, replace fuel with couple gallons of premium fuel to get it going. Hotter fuel will help if the compression is low. Good luck

Posted on Aug 24, 2011

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1 Answer

Have had generator in storage, Makita G1300R. What do I need to do repair wise to get it to start after about ten years in storage??


Remove air filter assembly. Disconnect fuel line from carburetor and drain old fuel into suitable container to discard. Fuel Shut Off in the On position. If fuel has gelled up in the tank or lines, add small amount fresh fuel in fuel tank, swish around several times and flush until clean.
Loosen and remove Carb Mounting nuts, throttle linkage and spring (note the position). Carefully remove Carburetor and very carefully remove gaskets (do not discard until completion of final reassembly)
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Inspect spark plug and replace (do not over tighten).
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If it starts initially, then it has spark. most likely the jets on the carbureator are clogged. You should remove the carb and clean/rebuild it.

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Hi men2cu...
Try this method, being you have spark and gas getting to the carburetor...

Get a can of starting fluid, and spray a small amount of it into the carburetor and then try to crank it again...if it cranks and runs then problem fixed...if it cranks and shuts off right away, then you have some trash in your inlet valve in your carburetor.
You can try tapping the carburetor lightly with a hammer and sometimes that will dislodge the float needle if it doesn't dislodge the needle valve then the carburetor will have to be disassemble and cleaned.
Once this is complete your generator should run fine.
Please take time to rate me

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Generator starts than shuts down on under voltage


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I have a Gen Power 10hp OHV Briggs & Stratton which is very hard to start. I have changed the spark plug, taken the air filter off but will not start.


I recently had trouble with my own generator. My situation was that the old gas left in the unit smelled more like lacquer than gas, the generator had not been cranked in over a year, and it simply wouldn't even attempt to fire when pulling the starter cord.

I checked the oil level, and drained and replaced the gas. I applied liberal amounts of carburetor cleaner into carburetor. The generater would briefly fire with cleaner in the carburetor. I also removed the spark plug, grounded it against the chasis, and observed good spark when I pulled the cord. This left me to believe gas simply was not getting into carburetor.

I removed the bowl and saw it was full of gas. With a container ready to catch any gas, I opened the valve near the tank and observed liberal amounts of fuel spilling from where bowl mounts to carburetor. So, good gas flow to bowl confirmed.

Using carburetor cleaner and compressed air, I blew out and attempted to clean every orifice I could see. I also checked the float assembly and saw the needle valve that allows/blocks fuel into bowl was operating freely. Reassembled everything, and still wouldn't start.

Took the bowl back out and gave the float assembly further inspection. On my unit, there is a large hole in the center of the assembly where the "perforated brass straw" should be sucking up gas. In the bottom of that hole I discovered a brass plug. I didn't spot this plug before because is was totally encrusted in trash. I was able to remove the plug. This thing is about 4mm long and wide. In the center of this plug I discovered a completely clogged hole. I had to actually scrape it clean with a metal pick, being careful not to damage the metal. I then followed up with lots of carb cleaner and compressed air to make the plug and the tiny hole completely clean. I replaced the plug, replaced the bowl, and the generator fired right up.

I wanted to share my story with you because of the frustration I went through taking my carburetor off at least 8 times before finally discovering this tiny brass plug that no one on any of the forums has ever mentioned.

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