Tuning Crosman F4 "Walmart edition" found in field - looking for advice

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samhain

samhain

Member
May 23, 2021
2
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Utah, United States
I was out with some friends doing a trash cleanup in a local ravine, and amongst other assorted sporting goods items - there was a Crosman F4 laying in a bunch of junk.

It has some external rust, but surprisingly it's functional, and in pretty good shape. It was in a trashed cardboard box, that actually provided a good shield from the elements & dirt for however long it laid there.

At first I wasnt sure how to operate it, I've had a few airguns in my day, but I'd never seen a "break barrel" style airgun. I figured it out, and went online and did a little research. Unfortunately, I'm not finding anything online as far as maintenance documentation or advice.

I bought the proper lubricant (RMCOIL), but I'd like any advice when it comes to what you'd either do/not do when it comes to lubing this thing up.
 
Sam,

F4s are a Crosman Nitro Piston Airgun made for Walmart to sell, exclusively. Cost around $80. First part of serial number should provide month/date of manufacture. Contact Crosman for information and copy of owner's manual. Manual will show place, frequency and amount of silicone oil to be used. Hope, for your sake, you've found a solid, safe gun. Break barrel springers utilize high pressures to send pellets at high speeds. Any unseen corrosion or deterioration could make for a dangerous situation. I'd have it checked out, to be sure. Best of luck,

WM
 
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Thanks for all the information, and that manual is close enough - it looks structurally identical.

Here's some pics of the gun. As you can see, it suffered some corrosion. I need to research the best way to deal w/ the rust, im going to clean it the best i can

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For right now give everything a good coat of antirust oil, the Birchwood Casy " Sheath" oil is a great rust preventer. Taking the rifle apart to derust each part would be best but oil and fine steel wool will remove most surface rust. There are also some rust removal products on the market, just dont get that stuff on any seals and check compatibility on the plastic stock. Bronze wool can also be used but will make the black take on a gold color. Once rust is removed, a good cold blueing and a nice coatbof oil should make you find look good once again. Nice find and thanks for doing your part to help the enviorment !!!
 
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