I have a power fist stapler nailer 8042509 which shoots up to 2" brads. The nailer works fine the problem is that the striker comes out too far and leaves a mark on the wood, I tried lowering the air pressure makes no difference. Can the travel of the striker be adjusted?

It appears to be a known issue

FinishPro® 18Mg - Senco

https://www.senco.com > docs > manuals-and-parts-charts

PDF FinishPro® 18Mg. 18 Ga. Brad Nailer. NFD81UMG Revised Mar. 11, 2014 (Replaces ... Fire." B First, ? pull trigger, then. ? push safety element against work surface for operation each time ... ? Double Action et ? Restriction. Dans certaines ...

FAQs ' SENCO

https://www.senco.com > faqs

A Restrictive Trigger tool will reduce the possibility of double fire and may reduce the speed of operation compared to a Dual Action Trigger tool. Call Customer ...

SOLVED: Shooting two nails instead of one - Fixya

https://www.fixya.com > support > t3317376-shooting_...

Question about Senco FP18 FinishPro 18 - Gauge Brad Nailer, 5/8" - 2" ... I would double check the plunger to make sure its resetting after each fire. Helpful 0 ...

nailer double nailing - Fine Homebuilding

https://www.finehomebuilding.com > forum > nailer-do...

Oct. 25, 2003 - I have a brand new bostich framing nailer and it is constantly double nailing and getting jammed. ... consider the senco framer I recently saw packaged with an 18 gage stapler for only $199 at Lowes. ... You can make the best of nailers double fire. ... Podcast 331: PRO TALK With Cabinetmaker Ben Scott ...

These tools are designed primarily as staplers, with a gimmick of being able to shoot brads. If you need to do a lot of brad nailing, purchase a brad nailer -- air or electric -- to do the job. In the meantime, try placing one or two drops of thin machine oil (3-in-1 is a common brand) on the impact area of the tool. Sometimes the adhesive used to form brads and staples into strips builds up on the tool surfaces and keeps them from moving freely.

Well you think of what is used the most , it's the trigger. Which is my guess

Stanley Bostitch has been sold to Dewalt. The link below has all the information and parts for your gun. Good luck with your projects.

http://servicenet.dewalt.com/

You can read more reviews on roofing nailer here: Best Roofing Nailer Roofing Nailer Reviews 2017 Buying Guide

The Bosch STN150-18 is a stapler. It will not shoot nails.

look on the front of the tool.there is a dial right where the plastic meets the yellow housing.also look closely and you should see a diagram on the plastic telling you whitch way to go.

Shoots staples fine but brads jam or bend. Check that the part called "guide bar", #35 on the parts diagram isn't getting stuck in the channel of part #30.

The guide bar retracts into the channel when driving a staple and springs out of the channel to guide brads.

The guide bar can get stuck in the channel if it's bent or gummed up. (Bent is likely the result of driving a brad into an obstruction.)

Trigger Valve needs replacing. Part Number is FA205BA1. The valve comes with instructions, its a pretty easy fix. Any BBostitch dealer should be able to get you one.

Shoots staples fine but brads jam or bend. Check that the part called "guide bar", #35 on the parts diagram isn't getting stuck in the channel of part #30.

The guide bar retracts into the channel when driving a staple and springs out of the channel to guide brads.

The guide bar can get stuck in the channel if it's bent or gummed up. (Bent is likely the result of driving a brad into an obstruction.)

The business end should look like this: