Question about Porter Cable-Cable FN250C 1-inch to2-1/2-inch 16 Gauge Finish Nailer

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My Porter Cable FN350C started multi firing. With one press of the trigger it would shoot several nails. The air pressure was good. What do you think would be the issue.

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Posted on Jan 02, 2017

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SOURCE: Porter Cable FN250c wont shoot with every trigger

Worn trigger and or worn firing valve. Remove the trigger and look for wear on contact surfaces (worn pin that holds trigger, worn inner lever inside trigger, worn or loose firing pin in valve ). Easy test for worn trigger. Remove the nails, remove trigger, fire the gun against wood with finger to test for proper action. If it works better without trigger, consider replacing trigger with new (I would also order the oring repair kit that includes the firing valve )

Posted on Nov 27, 2011

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1 Answer

My Porter Cable fn250c finish nailer does nothing when I press the trigger.


Could be lack of lubricant or safety foot not pushing trigger valve pin all the way in. Easy to check. Remove nails and remove trigger to expose the trigger valve firing pin. Connect air and with very quick action depress the firing pin all the way in with finger. If gun fires adjust safety so it pushes on trigger pin completely. If no fire, remove head and head valve and apply plenty of white grease or silicone paste to orings and reassemble for retest. Good luck

Jan 09, 2017 | Dewalt Air Tools & Compressors

1 Answer

Will not fire a nail when triggered.air passes through and out of trigger. seals checked ok. driver checked ok


pound out the trigger rocker switch and see if its that. press the trigger valve button without the trigger in place. could be your trip is not engaging the trigger far enough to make sufficient pressure to push the trigger down .

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My new porter cable RN175B nail gun won't discharge a nail


If the trigger is set to single fire, you will need to place the gun against the work then pull trigger as you have done. Try setting the trigger to bump fire and try again. If hear a thump inside the gun, remove the head and check that the head valve in not stuck from lack of lubrication. Easy test, remove the nails, remove trigger pin, remove trigger and manually push trigger firing valve. If the gun fires then suspect faulty trigger or safety arm not lifting enought to activate the trigger valve. Good luck

Nov 21, 2012 | Air Tools & Compressors

1 Answer

Miss fires and wont sink nails depth set deep and pressure over 120 psi


If no air is leaking from gun, miss-fire is usually caused by worn or too tight piston oring or lack of lubrication. Easy test. Disconnect airline, remove nails, point nose of gun up then down. Driver should stay in uppermost position. If driver moves up then down within gun replace piston oring and retest. Set pressure to about 100psi. Good luck with repair.

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1 Answer

Www.dewalt.com


Worn trigger valve orings will cause gun to fire twice, and /or attempting to single fire nail with bump-fire trigger. Easy test, look closely at firing pin under trigger. It should fit snuggly an not move from side to side in valve. If loose, replace valve. If your nailer has bump-fire trigger, do no attempt to place gun then fire one shot because the gun will most likely double fire. Good luck.

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1 Answer

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Normally I would say you aren't using enough air pressure because somewhere around 80psi (every tool is different) will not be enough to fully retract the driver. At 110 you are fine so that is not the case. I doubt it is broken because a broken driver will still retract unless it broke near the piston. My guess is it needs the o-rings replaced but you can pull the top head and pull the driver out first to make sure. Parts and breakdowns can be found here as DeWalt owns Porter Cable.

PC FR350 diagram

Aug 19, 2012 | Porter Cable Air Tools & Compressors

1 Answer

Only shoots out one nail for every 4 or 5 trigger pulls


The gun will miss fire if the driver does not return to top position allowing nails to move into position. Could be bent driver, faulty trigger, cracked lower bumper or check valve not in place. Easy to check if trigger. Remove air supply, and remove the pin holding the trigger. Fire the nailer by depressing the firing pin with your finger. If the gun works ok, single fire trigger is faulty or safety foot is out of adjustment. If still miss fire, remove head and pull out cylinder and piston. Check for bent driver, cracked lower bumper or black band (check valve) is out of place on outer part of cylinder covering a row of holes.

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1 Answer

Porter Cable FN250c wont shoot with every trigger pull. sometimes it shoots correctly (10% of the time), other times it just pops (no nail) and other times it shoots two nails at once. Also when it...


Worn trigger and or worn firing valve. Remove the trigger and look for wear on contact surfaces (worn pin that holds trigger, worn inner lever inside trigger, worn or loose firing pin in valve ). Easy test for worn trigger. Remove the nails, remove trigger, fire the gun against wood with finger to test for proper action. If it works better without trigger, consider replacing trigger with new (I would also order the oring repair kit that includes the firing valve )

Jul 26, 2011 | Porter Cable-Cable FN250C 1-inch...

1 Answer

Depth of nails


Sounds Like it's time for a Rebuild. On the Other Hand the tool may not have a Steady regulated pressure setting??
After further research I came up with a Contact Number for You for Porter-Cable for Service Centers 888-848-5175, I'm sure They can Help You Troubleshoot this Nailer more In-depth...
IF, You can't get any satisfaction with the Service Center you come up with, get back in touch with me, and give me an Area of the Country your In, and perhaps I can get you to a Better solution. I reviewed your Model Parts Schematic and seen Several Parts that could be the Culprits. But at this Point I strongly feel That Porter-Cable Service Center would be Your BEST alternative. Good Luck!!

Mar 26, 2009 | Porter Cable Cable No. FR350A Rnd Head...

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