How to unlock Graco Paint Sprayer trigger?
- JJames GarciaSep 10, 2025
If you cannot trigger the spray gun of your Graco Paint Sprayer, the spray gun trigger lock is likely locked. Rotate the trigger safety lever to unlock the trigger lock.

How to unlock Graco Paint Sprayer trigger?
If you cannot trigger the spray gun of your Graco Paint Sprayer, the spray gun trigger lock is likely locked. Rotate the trigger safety lever to unlock the trigger lock.
What to do if my Graco MAGNUM LTS 17 Paint Sprayer motor doesn't run?
If your Graco Paint Sprayer's motor isn't running, even when it's plugged in and the power switch is on, there are several possible causes and solutions: * Ensure the pressure isn't set to zero; turn the pressure control knob clockwise to increase the pressure setting. * Check the outlet by trying a different one or plugging in a working device. Reset the circuit breaker or replace the fuse if needed. * Inspect the extension cord and sprayer power cord for damage, replacing them if necessary. * If paint or water is frozen in the pump, thaw it completely before attempting to start the sprayer. If the paint has hardened, the pump packings, valves, drivetrain, or pressure switch may need replacement, consider taking your sprayer to an authorized service center.
What to do if Graco MAGNUM LTS 17 dribbles?
If your Graco Paint Sprayer pump cycles, but paint only dribbles or spurts when the spray gun is triggered: * The pressure may be set too low. Slowly turn the Pressure Control Knob clockwise to increase the pressure setting. * The spray tip might be clogged; unclog it. * The InstaClean™ fluid filter could be clogged; clean or replace it. * The spray gun fluid filter may be clogged; clean or replace it. * The spray tip might be too large or worn; replace it.
Why my Graco MAGNUM LTS 17 pump cycles but does not build pressure?
If the pump of your Graco Paint Sprayer cycles but does not build up pressure, try the following: * Prime the pump. * Clean any debris off the inlet screen and make sure the suction tube is immersed in fluid. * Ensure the suction tube is immersed in the paint. * Tighten the suction tube connection and inspect for cracks or vacuum leaks. If cracked or damaged, replace the suction tube.
What to do if my Graco Paint Sprayer gun stopped spraying?
If your Graco Paint Sprayer gun stopped spraying, consider the following: * Remove the suction tube from the paint and prime the pump with water or solvent-based flushing fluid. * Tighten the suction tube connection and inspect for cracks or vacuum leaks. * Unclog the spray tip.
Why won't my Graco Paint Sprayer build up pressure?
If your Graco Paint Sprayer pump cycles but doesn't build pressure, it could be due to several reasons: * The pump may not be primed; make sure to prime it. * The inlet screen might be clogged; clean any debris off the inlet screen and ensure the suction tube is immersed in the paint. * The suction tube may not be immersed in paint; ensure it is. * The suction tube could be leaking; tighten the connection and inspect for cracks or vacuum leaks. Replace if damaged.
Why is coverage inadequate with my Graco MAGNUM LTS 17?
If coverage is inadequate when spraying with your Graco Paint Sprayer: * The coat might be going on too thin; move the gun slower. * Consider using a tip with a larger hole size. * Consider using a tip with a narrower fan. * Ensure the gun is close enough to the surface.
How to unlock the trigger on Graco MAGNUM LTS 17?
If you cannot trigger the spray gun on your Graco Paint Sprayer, rotate the trigger safety lever to unlock the trigger lock.
Why is the coverage inadequate when using my Graco Paint Sprayer?
If the coverage is inadequate when using your Graco Paint Sprayer, it could be due to the following reasons: * The coat is going on too thin, so move the gun slower. * You may need to choose a tip with a larger hole size. * You may need to choose a tip with a narrower fan. * Make sure the gun is close enough to the surface.
Why does my Graco MAGNUM LTS 17 Paint Sprayer motor overheat?
If your Graco Paint Sprayer motor is hot and runs intermittently, and it automatically shuts off due to excessive heat, it could be due to these reasons: * The vent holes in the enclosure might be plugged, or the sprayer is covered. Keep the vent holes clear of obstructions and overspray, and ensure the sprayer is open to air. * The extension cord might be too long or not a heavy enough gauge. Replace the extension cord. * If using an unregulated electrical generator, it might have excessive voltage. Use an electrical generator with a proper voltage regulator. The sprayer requires a 120VAC, 60 Hz, 1500-Watt generator.
| Type | Airless Paint Sprayer |
|---|---|
| Max Tip Size | 0.017 inches |
| Max Pressure | 3000 PSI |
| Hose Length | 50 feet |
| Weight | 20 lbs |
| Power Source | Electric |
| Motor Power | 5/8 HP |
| Spray Tip Size | 0.017 inches |
Read all warnings and instructions in this manual. Save these instructions.
Proper grounding is essential to reduce the risk of electric shock.
Flammable fumes can ignite or explode. Take precautions to prevent fire.
High-pressure spray can inject toxins into the body, causing serious injury.
Misuse can cause death or serious injury. Always follow safety guidelines.
Improper grounding, setup, or usage can cause electric shock.
Toxic fluids or fumes can cause serious injury or death. Read MSDS.
Wear appropriate protective equipment to prevent injury.
Sprayer must be grounded to reduce risk of static and electric shock.
Engage trigger lock when stopping spraying to prevent accidental discharge.
Procedure to relieve pressure before cleaning, servicing, or transporting.
Instructions for installing the spray tip and guard onto the gun.
Procedure for clearing a clogged spray tip.
Procedure for flushing the sprayer system using paint pails.
A faster method of flushing for water-based coatings.
Table of common problems, their causes, and solutions.
Steps to take when the pump fails to prime.
Solutions for when the pump cycles but pressure is not building.












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