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Houston, I Have A Problem!


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#1 KennyP ONLINE  

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Posted July 21, 2012 - 07:39 AM

For some reason my MTD mower has decided to drain the gas tank into the crankcase. This has a B&S 14 HP OHV, model 287707, type 0220-01. The carb has the solenoid into the bottom of the bowl. Has this caused the fuel to not shut off?

#2 NUTNDUN OFFLINE  

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Posted July 21, 2012 - 07:57 AM

I don't know if those carbs have a float needle in them as well or not but it sounds like it could be the solenoid or a combination of the solenoid and the float needle.
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#3 HowardsMF155 OFFLINE  

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Posted July 21, 2012 - 08:01 AM

I am not familiar with those engines either. Does it have a fuel pump? And is it run by a connection to the crankcase (ie a vacuum pulse pump)? It seems so unlikely that BOTH the solenoid and the float would fail at the same time.
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#4 ducky OFFLINE  

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Posted July 21, 2012 - 08:06 AM

Kenny
I believe it will be the needle. The solenoid shuts off the fuel to the engine when key is off but the needle shuts off the fuel coming from the tank and it could allow the carb to still run over.
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#5 KennyP ONLINE  

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Posted July 21, 2012 - 08:08 AM

Not fuel pump, straight gravity! Does the solenoid just un screw?

#6 Amigatec OFFLINE  

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Posted July 21, 2012 - 08:20 AM

I will bet it the solenoid, if you are running ethanol gas then it probably has some trash in the fuel system and it got fought in the solenoid.

#7 DougT ONLINE  

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Posted July 21, 2012 - 08:42 AM

Like ducky says, it's the needle valve and not the solenoid. The solenoid shuts the fuel off going into the main jet inside the carb. It doesn't keep the fuel from entering the carb. As long as its not flooding when its running, put a shut off in the fuel line and use it.

#8 KennyP ONLINE  

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Posted July 21, 2012 - 09:04 AM

I pulled the plug and gas just poured out. Took the solenoid out and sediment bowl. Lots of nasties in there. I do have an inline filter, but have not had the carb apart before. I pulled the float and needle, sprayed out with carb cleaner. Float will shut fuel off now and soleniod is working. just have to let things air out for a bit. I have enough oil to put some in, run a bit and change again. Right now, I'm letting it sit to see if more fuel leaks thru. If it does, I'll have to pull the carb and get a new needle and seat.
Pat I do use seafoam in the gas.

#9 jms180 ONLINE  

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Posted July 21, 2012 - 11:03 AM

Kenny i had a Kohler engine do that and i put a fuel shut off valve in fuel line below fuel tank. After each use i would turn off valve let engine run until stopped, this would get most of fuel out of bowl it will not get all of fuel out but most of it out. This may help and shut off valve only about 8-10 $.
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#10 KennyP ONLINE  

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Posted July 21, 2012 - 12:15 PM

A big thanks to everyone! I put in a fuel shutoff, have the oil all changed and it sounds great. Guess a piece of debris got stuck in the needle seat. Purrs right along now. Thanks!

#11 Cvans ONLINE  

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Posted July 21, 2012 - 01:41 PM

I also ended up installing the manual shut off valve. Crankcase full of gas twice was enough for me. As I understand it the sole purpose of the solenoid is to eliminate backfires when shutting down the engine and not to control fuel flow into the carb. My problem was to remember to shut off the manual valve each time.

#12 KennyP ONLINE  

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Posted July 21, 2012 - 02:34 PM

My problem will be remembering to turn it back on!

#13 Texas Deere and Horse OFFLINE  

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Posted July 21, 2012 - 03:27 PM

You will figure that out evrey time it dies. :laughingteeth:
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#14 cookiemonster OFFLINE  

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Posted July 21, 2012 - 04:32 PM

Good deal. Glad it was something that didn't cost a bunch of cash.
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#15 HDWildBill ONLINE  

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Posted July 21, 2012 - 04:36 PM

Sounds like the non-EFI motorcycles. You have to turn the gas off for the same reason. You'll figure it out real quick when you forget.
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