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#1
08-17-2015, 06:39 PM
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Carb replacement. Won't start
My 3240 was acting up. Ran fine but would lose power or die while mowing. Took the carb off to remove the backfire solenoid as it had been a problem in the past. The carb broke where it bolts to the engine. Ordered a new one with the exact same part number (24 053 59) and installed it today. Now it won't start. Turns over and runs for about 2 seconds and dies.
Any hints or tips? Started just fine before replacing the carb. Pulled the fuel hose and confirmed fuel is running to it. Tried blowing through the hose and into the carb and couldn't get any movement. Didn't see any valves to set... 
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#3
08-17-2015, 07:45 PM
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Which solenoid? If you are speaking of the anti backfire solenoid, I assume it is working somewhat. The carburetor came with a brand new one and when I unplugged it to test, the engine would not start at all. Are you suggesting that it may be getting stuck partially even though it is brand new?
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#5
08-17-2015, 09:46 PM
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How can I test the solenoid on my carburetor?
The anti-after fire solenoid is a device that shuts OFF the fuel at the carburetor to prevent the engine from receiving fuel after the ignition switch is shut OFF. Anti-afterfire solenoids are installed on select engines that have a battery-powered electrical system. To test the anti-afterfire solenoid, connect one pole of a 9 V battery to the spade terminal and the other pole to the solenoid case. A sharp distinct movement should be seen. If not, the solenoid is defective. Care should be taken to prevent damage caused by over extension of the plunger during removal and installation. When testing some anti-afterfire solenoids, the plunger must be touched or nudged to initiate movement. When installed in the carburetor, the anti-afterfire solenoid plunger contacts the orifice in the jet before reaching the maximum extended position. When removed from the carburetor, the plunger is in maximum extended position. A nudge may be required because power from the 9 V battery may not be sufficient power to retract the plunger from the maximum extended position. This solenoid must be connected to 12 volts while the engine is running and no voltage when the key switch is turned off. It can come 2 ways. The old style had the solenoid case as the ground, which automatically grounded it when it was screwed into the carburetor and the black wire went to the key switch. Now, there are 2 wires, the gray one goes to the key switch and the black one goes to ground.
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#6
08-18-2015, 06:53 PM
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While all that was good information..... being that the solenoid is new, I'm more apt to suspect a wiring or a circuit problem than that the solenoid is bad. IS IT GETTING POWER when it's supposed to is what I want to know......
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#8
08-18-2015, 07:48 PM
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Just run a jumper from the + battery to the lead to the solenoid and listen for a "click" when the lead is attached.
You can do the same by just turning the key off/on.
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