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General Category => General Discussion => Topic started by: Pescatore on July 19, 2025, 06:20:09 PM

Title: Plugs on PHBH30 carburetor body
Post by: Pescatore on July 19, 2025, 06:20:09 PM

I've cleaned this plug on the carb body 3 times now, to convince myself that it is leaking.
It's more of a wheep, after long rides.  Both carbs are doing it.
What is it for?  Can it be replaced?
Internet wisdom says it's an expansion plug that you set with a punch.

(https://i.ibb.co/SLQ1qZC/20250705-152410.jpg) (https://ibb.co/SLQ1qZC)

Title: Re: Plugs on PHBH30 carburetor body
Post by: guzzisteve on July 19, 2025, 07:29:12 PM

That is the breather for the bowl, may be a small hole that pukes fuel. Have a close look hole will face down. Some had a tube there or strait across on back side.
Look in the well, up at bottom of that pressed in cap, should be a hole in it.

Title: Re: Plugs on PHBH30 carburetor body
Post by: Pescatore on July 19, 2025, 09:21:45 PM

Thanks guzzisteve, I just found this, #10

(https://i.ibb.co/5X8fXLzZ/Screenshot-20250719-212004-Drive.jpg) (https://ibb.co/5X8fXLzZ)

So gas is evaporating out of the hole?
I guess there's no stopping it.

Title: Re: Plugs on PHBH30 carburetor body
Post by: guzzisteve on July 20, 2025, 07:59:12 AM

If the float is set correctly, maybe some dribbles.