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B 112 Strange ( To Me ) Problem


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#1 steve b OFFLINE  

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Posted July 08, 2014 - 08:18 AM

Went to mow last week with the B112 and experienced the following: Tractor starts right away, no choke needed, I let it idle for 1 minute or so, I increase the throttle to about 1/2 way and let that set for another 30 seconds or so, I give it a bit more throttle and engage the mower deck... Motor dies instantly. It starts right back up and I repeat the same procedure get the same result. After I let it run under no load for about 5 minutes all was fine. I figured this was a one time thing and forgot about it. I mowed again yesterday and had the same experience. Again it was fine after it warmed up for about 5 minutes. This morning I went to move the tractor and had the same problem... as soon as I let the clutch off the motor died instantly. Any idea to the cause of this? It seems to be you can't put any load on the engine until it has warmed up for about 5 minutes.



#2 boyscout862 ONLINE  

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Posted July 08, 2014 - 08:38 AM

I would suspect water in your gas. I would also check the carb adjustments when it is warm. I've been having strange problems with the magneto on my Big Ten and plan to change it soon. Mice had dammaged it and I thought that I'd repaired it but it cuts out often. Good Luck, Rick



#3 Lmiller3358 OFFLINE  

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Posted July 08, 2014 - 08:52 AM

Was thinking ambient tempature also with this heat lately, I have an 8 hp Briggs being finickly lately also !!!



#4 JDBrian OFFLINE  

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Posted July 08, 2014 - 10:07 AM

With those symptoms I'd give the engine a good once over to see if I could find anything amiss. Plugged air filter, fuel filter, bad fuel, spark issue when cold etc. Good luck tracking down the issue.



#5 steve b OFFLINE  

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Posted July 08, 2014 - 11:27 AM

I just put a new fuel filter on and cleaned the tank a few weeks ago. Gas I purchased within the month. I will check the plug and air filter soon. Thanks


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#6 VintageIronCollector OFFLINE  

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Posted July 08, 2014 - 12:08 PM

Let me get this right when you turn on the deck it stalls the engine out right?



#7 superaben OFFLINE  

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Posted July 08, 2014 - 05:40 PM

Sounds to me like a bad condenser, worn points, or worst case a coil.

 

Did you check all that?

 

Ben W.


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#8 steve b OFFLINE  

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Posted July 09, 2014 - 07:36 AM

  • Vintage, any load shuts off the engine instantly- until it has run for several minutes.
  • Super, The ignition has been switched over to electronic.


#9 VintageIronCollector OFFLINE  

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Posted July 09, 2014 - 10:03 AM

  • Vintage, any load shuts off the engine instantly- until it has run for several minutes.
  • Super, The ignition has been switched over to electronic.

Okay never mind I was going to say if as soon as you turn the mower deck on it just kind of stalls the engine out it might be that there's something in the mower deck that is putting enough force against the engine to stall it.




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