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Hot!Honda Carburetor Replacement

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Wombat
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2018/06/03 22:17:59 (permalink)
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Honda Carburetor Replacement

Hi all, my first post. I am restoring an old Honda walking tractor. It is fitted with a Honda G65 6.8HP engine. I have stripped it down and all appears to be fine and measurements are within tolerances so should run. My problem is with the carburetor, parts needed are obsolete and no longer available and there are no substitutes. I have no idea of make or model of the carburetor but in my searching saw a reference to "engine pump" don't know if that is critical. Looking at modern replacements they are rated at 5.5-6.5 HP or step up to 7-8 HP so my main question is do I look at 6.5 or 7 HP? The smaller HP have inlets smaller than the original while the larger HP have larger. Mounting holes are all different spacing and angles so I am making an adapter inlet manifold - half way there just need the final carburetor dimensions to finish it off.
Can anyone recommend a replacement?
 
David L

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    Wombat
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    Re: Honda Carburetor Replacement 2018/06/05 06:19:46 (permalink)
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    I've answered my own question with a bit of thought and measurement. Worked out the diameter of the throttle butterfly throat and the choke throats were the same diameter as the old one on the 7HP whereas the 5HP one were smaller. As HP is governed by the CFM of air passing through the carburetor I figured one with the same size throats would deliver the goods. Thanks for reading.
     
    David L.
     
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