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Dan
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3,954 Posts
Discussion Starter #1
Well I bought this for $40.

It Ingersoll Rand 4000 20 or 30 gallons with 5 hp brigg. It rated 125 psi MAX.

Yes I call Ingersoll on Recall they had. They say no recall on 5 hp brigg.

Guy who own before me replace old 5 hp brigg with newer 5 hp brigg from mini bike or gokart. He didn't tight pulley set screw good. He lost pulley.


Only I know that air pump is rated 1500 rpm. Air pump's pulley is 11". Anyone able do math? brigg 5 hp I would say set at 3600 rpm.
 

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Moderator
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4.5" to 4.625" diameter for the engine.

If the engine labours, try 4.25" diameter.
 

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349 Posts
Engine RPM x Engine Pulley Diameter / Pump Pulley Diameter = Pump RPM

So 3600 x (n) / 11 = 1500

So the above 4 1/2 - 4 5/8 should be right.
 

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Dan
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3,954 Posts
Discussion Starter #4
Thank for info.

I will let you know how it running. Going to pulley store tomorrow possible.
 
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