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scottorious 09-11-2012 05:40 AM

ch150 carburetor question
I just acquired a kind of basket case ch150 and I want to build a skelly out of it. I am in the process of rebuilding the carburetor and this model has an air cut-off valve. I didnt get the valve while it was put together so I am not sure if there are internals that I am missing. Is anyone familiar with that? The parts view only shows the entire valve and the service manual doesnt mention anything about whats inside the valve body.

tortoise2 09-11-2012 10:30 AM


Originally Posted by scottorious (Post 19567774)
air cut-off valve

This video may or may not help . . link.

bbishoppcm 09-11-2012 06:09 PM

That video SUCKS. Try this one instead;

bbishoppcm 09-11-2012 06:12 PM

The cutoff valve should never be disassembled; but yours should include a diaphragm, a tiny o-ring, and a spring. If either part is missing, you'll need to either buy a whole new valve from Honda, or buy a used carb off eBay. You can buy a Chinese carb and use it for parts, but beware; the Chinese carbs are a TOTAL gamble (as you'll see in the first video sent by tortoise), but can save you a bundle in parts IF the parts were accidentally made right! In the case of my Honda Helix, the original cutoff valve was leaking, and the o-ring was not available ANYWHERE! I ended up having to buy a whole new valve... for around $90.

scottorious 09-11-2012 07:10 PM

thanks for all the info. After seeing the video I could see that I no longer had the parts that go inside. I was able to find one on ebay for 19 dollars and i sprung at the chance after seeing that those things are expensive to buy new.

bbishoppcm 09-11-2012 07:30 PM

Just don't open it! There is a test procedure to verify the valve actually works; the exact procedure escapes me right now though...

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