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Float Bowl ?


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#1 sodisr OFFLINE  

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Posted November 26, 2013 - 09:57 AM

Need to ask a dumb  ????

 

When raising the float bowl-  OR  lowering it,,  Which way doe's it go.???

 

  If I want to lower it  do I  loosen it  ( Counter clock wise )

 

     This is on a Tec. engine   HH150

 

   I'm haveing a HEAK of a time getting the carb adjusted..  I set it at fac. specs. And I need to run the choke at about half on

    I seem to get alot of back-fire

    The plug is black

    The odd thing is it runs very well at full throttle.. I plan on a rebuild,  but  I need it for now to blow snow.  So I would like to wait til spring.. Any other simple things I could try to bide some time.  Thanks   sodisr.


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#2 HDWildBill OFFLINE  

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Posted November 26, 2013 - 10:35 AM

I asume you are talking about the adjustment screw on the bottom of the bowl.  If you screw it in you lean out the mixture and out to make it richer.  Running with 1/2 choke would indicate a lean mixture.  Have you checked for air leaks down stream, around the manifold?


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#3 MyBolens1053 OFFLINE  

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Posted November 26, 2013 - 10:41 AM

Your symptoms (choke half on and backfiring) are signs of too lean of a fuel mixture/air leak. You can test for air leak by spraying WD-40 around the gasket and linkage areas of the carb while the engine is running and see if that smooths it out. If it does, then you know to replace the gaskets/seals.

If you pass the leak test then adjust your bowl feed for more fuel. Then tweak the idle mixture. This needs to be done while the motor is under a load (engage your PTO for this).

 

Hope this helps.


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#4 Sawdust OFFLINE  

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Posted November 26, 2013 - 10:41 AM

The plug being black indicates your running too rich.

Edited by Sawdust, November 26, 2013 - 10:44 AM.


#5 OldBuzzard ONLINE  

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Posted November 26, 2013 - 11:27 AM

The plug being black indicates your running too rich.


That's because he's running with 1/2 choke. With out the 1/2 choke he's running lean.

If he was running with no choke, then the black plug would indicate a rich mixture.
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#6 Oregon_Bolens OFFLINE  

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Posted November 26, 2013 - 12:08 PM

The o-ring for the fuel bowl is very easy to pinch and not get a good seal. This could cause an air leak as mentioned. With a little grease, I was able to get mine to finally line up and seal correctly when putting the carb back together on my HH150.


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#7 MyBolens1053 OFFLINE  

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Posted November 26, 2013 - 01:30 PM

That's because he's running with 1/2 choke. With out the 1/2 choke he's running lean.

If he was running with no choke, then the black plug would indicate a rich mixture.

Good call OldBuzzard.






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