ch150 carburetor question

scottorious · 09-11-2012, 05:40 AM

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

Quote:

Originally Posted by scottorious

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; http://www.youtube.com/watch?v=dxpI-SY39AM

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...

09-11-2012, 05:40 AM	#1
scottorious ^OP n00b Joined: Jul 2012 Oddometer: 9	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.

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09-11-2012, 06:09 PM	#3
bbishoppcm It ain't a moped. Joined: May 2010 Location: Bennington, NH Oddometer: 662	That video SUCKS. Try this one instead; http://www.youtube.com/watch?v=dxpI-SY39AM

09-11-2012, 06:12 PM	#4
bbishoppcm It ain't a moped. Joined: May 2010 Location: Bennington, NH Oddometer: 662	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.

09-11-2012, 07:10 PM	#5
scottorious ^OP n00b Joined: Jul 2012 Oddometer: 9	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.

09-11-2012, 07:30 PM	#6
bbishoppcm It ain't a moped. Joined: May 2010 Location: Bennington, NH Oddometer: 662	Just don't open it! There is a test procedure to verify the valve actually works; the exact procedure escapes me right now though...