Graco 3340 Manual De Usuario

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Engine will not start or it is hard to 
start

No gasoline in fuel tank or carburetor Fill tank with gasoline, open fuel shut-

off valve. Check fuel line and carbure-
tor.

Low oil

Add oil to proper level.

Engine ON/OFF switch in OFF posi-
tion

Turn switch to ON position.

Water in fuel or old fuel

Drain fuel tank and carburetor. Use 
new fuel and make sure spark plug is 
dry.

Engine flooded or improperly choked Open choke. Pull engine starter rope 

several times to clear out fuel. Make 
sure spark plug is dry.

Dirty air cleaner filter

Remove and clean filter.

Spark plug dirty, wrong gap or wrong 
type

Clean, adjust gap or replace spark 
plug.

Gun not triggered

Trigger gun while starting engine.

6.5 hp Briggs and Stratton model 
may experience “vapor lock” due to 
gas type and temperature

Allow unit to cool approximately 15 
minutes and restart.

Engine misses or lacks power

Partially plugged air cleaner filter

Remove and clean.

Valve adjustment (lash) worn

Adjust valve (lash) to manufacturer’s 
specifications.

Spark plug dirty, wrong gap or wrong 
type

Clean, adjust gap or replace spark 
plug.

Pressure is too low and/or pump runs 
roughly

Worn or wrong size tip

Replace with tip of proper size.

Inlet filter clogged

Clean. Check more frequently.

Worn packings, abrasives in water or 
natural wear

Check filter. Replace packing.

Inadequate water supply

Check water flow rate to pump.

Fouled or dirty inlet or discharge 
valves

Clean inlet and discharge valve 
assemblies. Check filter.

Restricted inlet

Garden hose might be collapsed or 
kinked. Check hose and straighten to 
remove kinks.

Worn inlet or discharge valves

Replace worn valves.

Leaking high-pressure hose

Replace high-pressure hose.

Water leaks from under pump mani-
fold

Worn packings

Install new packings.

Water on oil side of pump

Humid air condensing inside crank-
case

Change oil as specified in Mainte-
nance Chart, page 11.

Worn packings

Install new packings.

Oil seals leaking

Install new oil seals.