small pressue pump for diagnosing needle and seat problems


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Old 04-16-14, 09:26 AM
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small pressue pump for diagnosing needle and seat problems

Would anyone have a place to buy a small pressure pump with gauge to check needle and seat issues for carbs??
 
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Old 04-16-14, 09:47 AM
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MityVac makes small handheld vacuum pumps that folks often use to check them. Many auto parts stores sell them.
 
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Old 04-16-14, 10:20 AM
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pressure pump

Yeah, I have one Cheese but mine doesn't do the pressure side.I guess you could put vacuum on it but would you get the same result as putting the pressure on it.
I just use a small hose and blow thru it now. How about you?
 
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Old 04-16-14, 06:17 PM
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I connect them to a gas tank and check them under the exact conditions they will be in if I have one that I'm uncertain of. I normally don't even check them prior to installation unless I have reason to suspect it will give me a problem.
 
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Old 04-17-14, 07:03 AM
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I've always found blowing in a piece of clean fuel hose to be good enough...but I suppose some day I'll run across one that leaks <just a little> and won't be detectable that way.
On my cheap plastic MityVac the pressure side is the same size hose stub as the vacuum side and can push or pull.
 
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Old 04-17-14, 03:46 PM
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The needle and seat

Take an outboard motor fuel line, they have a squeeze ball that should generate enough pressure to make a float needle leak if its going to. You can usually find an old one at most any outboard/marine shop. You might have to do some adapting to get the size right. Mind the arrow on the ball.
Sid
 
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Old 04-17-14, 07:47 PM
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Pretty good idea there, sidny!
 
 

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