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My Dayton siphon spraygun sputters.

I have cleaned it well several times but it still sputters. The sputtering is even with water thin viscosities. The fan is nice. Adjusting pressure, fluid doesn't seem to help.

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  • Jim London
    Jim London May 11, 2010

    Hi, Is your air supply clean and dry? Do have a filter or dryer?

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  • 14 Answers

There is an air leak at fluid tip; sucking air into fluid at some point.

Posted on Aug 02, 2009

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My sprayer is sputtering I think it's a problem with suction because if I apply a little pressure with my hand on the bottle it sprays. Also I have completly cleaned it so there is no residual


There is nosuction on this type of unit it blows air into the pot andforcesitout through the tip have a lookdown the air hose make sure it is not bblocked as low pressure will cause sspitting

Feb 17, 2013 | GRACO INC 2900 Spray Station HV2900USG

1 Answer

I have a craftsman HVLP Spray gun. Even when we thin the paint, the paints comes out in sputters or not at all. What could be the problem?


the passage might not be cleaned and is blocked.
take the air cap off make sure u can see all the holes thru the lights. take the nozzle and the cup off. see if there's any build-up inside that might possibly block the paint coming out.
over all, clean the gun good with thinner

Sep 05, 2011 | Air Spray Guns

1 Answer

On a Campbell Hausfeld DH5030 spray gun, there is a screw valve at the base of the unit with arrows labeled S and P for turning clockwise and counterclockwise, respectively. What is this for?


The "P" stands for pressure feed. turning it completly to this side forces air into the cup pushing the paint out.

The "S" is for siphon feed where the air through the tip sucks paint from the cup.

If your using thin materials like lacquers or polyurethane or solvent based enamels the siphon feed is used.

If your using thicker materials like water based latex or heavy stains then go with the pressure setting.

You can always go in between for some pressure with the siphon action....depends on coatings used.

Jun 22, 2011 | Campbell Hausfeld DH5300 General Purpose...

2 Answers

I am using DeVILBISS JGA_510 cinventional spray gun. The pressure pot system is showing constant pressure , but the gun is sputtering and not getting an even paint flow. I have changed paint lines, put on...


First start with the basics, whats the paint VISCOCITY ON A FORD 4 CUP ??
Or Does it run nicely off the stick you stirred it with??

If its thin enough to go up the tube and lines, whats the fluid tip and air cap combo your using?? maybe start with a EX fluid tip (1.8mm) and 30b air cap (cos that sprays everything!!) and reduce from there.

Whats the pot pressure?? Is it a KBII pot? cos they suffered with the air inlet blocking, so IT SHOWS GOOD PRESSURE, but doesnt have it in the pot!

Does it spray anything?? thinners?

Mar 07, 2011 | Air Spray Guns

1 Answer

Campbell Hausfeld 2000 Psi Gas Pressure starts and runs for a stort time then dies out and is hard to start with the water pressure still on. Will run for a stort time only after it has sat fo awhile....


Replace or clean with spray carburetor cleaner, the fuel filter which is likely plugged. Make sure the fuel tank vent is open. Sometimes, a fuel system cleaner is helpful like 'Seafoam". Make sure the oil is clean and topped up. A muffler can sometimes plug up and cause a similar problem. Hope this helps!

May 18, 2010 | Campbell Hausfeld 2000 Psi Gas Pressure...

3 Answers

Air is coming out of the nozzle but the paint is not coming out.


There are different filter screen sizes for different thickness of paint. Even with proper screen size one might need to thin paint. I hope this information is helpful. Please give a rating if this was helpful. Good Luck and have a Great Weekend.

Apr 01, 2010 | Binks MACH 1 HVLP Pressure Feed Spray...

1 Answer

Adjusting needle for optium spray pattern


There are a number of possible causes.
These are compounded by the different types of guns like HVLP and what would an older style. Also are you using a pressurized, gravity feed or siphon gun.
However, the reason for spatter is improper atomization of the air and paint. The most common causes are incorrect air flow or incorrect paint viscosity. If you don't have a way to check the viscosity get one. I painted in factory repair area that used a pressurized system. On any given day there might be 9 to 12 colors we used. Each one would have a different vis. Air adjustments could range from 50 psi. to 95 psi. This will hold true for almost any type of paint.

May 04, 2009 | Air Spray Guns

1 Answer

Finish is rough


Spraying smooth needs both the right airflow and right viscosity. Since your getting lap lines I would say your putting it on too thick. Thin down your coat, it should be approximately the thiness of water.

Apr 03, 2009 | Accuspray 4 Stage Turbine Sprayer...

1 Answer

Problem spray painting water based paint


I spoke to a friend who was a spraypainter in his last job, apparently due to the thickness of the paint, I needed a larger nozzle on the gun. I couldnt get a nozzle to suit this gun so I purchased another gun with a cuple of different size nozzles. All seems to be working fine now.

Nov 19, 2008 | Air Spray Guns

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