Need help w/FN250B Finish nailer

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Forum topic by mikeb59 posted 10-30-2010 06:38 PM 1153 views 0 times favorited 2 replies Add to Favorites Watch
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3 posts in 3073 days

10-30-2010 06:38 PM

Topic tags/keywords: question

I have a Porter-cable FN 250b nailer I’m having trouble with. I can fire several nails one after another and then the next time I try to shoot a nail all I get Is a light puff. Then after a couple of dry fires it works again. I keep them well oiled, and use the safety mechanisim. It just seems like the safety doesn’t fully engage the trigger even though I make sure it’s depressed. Trying varying lengths of nails or brands doesn’t help either.
Thanks in advance for any assistance ;-)
Have a great weekend!

2 replies so far

View TomHintz's profile


207 posts in 3420 days

#1 posted 10-30-2010 08:09 PM

I have that same nailer and had it do about the same thing. I found a chip of wood stuck in the safety mechanism up toward the trigger, maybe 1/2” or so below that. (Its been a couple years since this happened)
The wood was essentially shimming the safety down to where it would not always let the trigger work. I cleaned it out and it has worked perfectly ever since.

-- Tom Hintz,

View mikeb59's profile


3 posts in 3073 days

#2 posted 11-03-2010 01:15 PM

Thank you Tom for your reply, you gave me an area to investigate and I ended up finding the trigger spring was not seated on the tab provided. It must have gotten knocked off somehow. The gun is now firing every time once again!
Thank You

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