Speargun Maintenance Guide: Clean, Lubricate & Preserve

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Got a speargun that’s starting to rust, jam, or feel sluggish after a dive? You’re in the right place. This speargun maintenance guide shows you a 5‑minute, repeatable routine that stops corrosion, keeps the trigger crisp, and extends the life of your gear dive after dive.

Why a Quick Rinse Won’t Save Your Gun

A brief splash of fresh water looks good, but salt crystals hide in tiny crevices, soak the metal, and kick off corrosion within hours. Even a thin film of brine creates a perfect breeding ground for rust, especially around the trigger pivot, barrel interior, and O‑rings. The result? Sticky triggers, speckled barrels, and costly part replacements.

Key takeaway: Only a thorough clean, proper lubrication, and dry storage will truly protect your speargun.

Step‑by‑Step Speargun Maintenance Guide

1. Disassemble – keep it simple

Unload the gun completely.
Remove the spear shaft and line.
Unscrew the trigger assembly (most use a thumb screw).
Take off the barrel cover if your model has one.
Pop out the spring only if you’re comfortable; otherwise leave it in place.

A small flat‑head screwdriver and a cup for the screws are all you need.

2. Clean the gun after every saltwater dive

Fill a bucket with lukewarm water and a splash of dish soap.
Submerge the barrel, trigger housing, and all metal parts for a few minutes.
Use a soft brush—an old toothbrush works great—to scrub away salt crust.
For stubborn spots, let the parts soak for about 10 minutes; no harsh chemicals required.

3. Dry every component thoroughly

Shake off excess water and pat dry with a lint‑free cloth.
Follow with a few minutes of air‑drying or a low‑heat hair dryer on the cool setting.

Prevent speargun corrosion on reef dives by eliminating every droplet before storage.

4. Lubricate with the right products

Marine‑grade silicone spray for moving parts (trigger pivot, lock mechanisms).
Light mineral oil for the barrel interior.

Apply a thin coat—just enough for smooth movement—then wipe away any excess. Too much oil attracts dust and grime.

5. Reassemble and test

Re‑insert the spring (if removed), snap the barrel cover back on, and tighten the trigger screw.
Pull the trigger; it should feel crisp.
Slide the spear in and out; there should be no resistance.

If anything feels off, disassemble again and check alignment.

6. Store smart for the next dive

Place the gun in a sealed plastic bag with a small desiccant pack.
For short trips, wrap the gun in a dry towel and store in a dry box.

The goal is to keep the gun dry, lubricated, and out of salty air until you hit the water again.

Quick Reef‑Side Conservation Tip

Rinse the gun with a bucket of fresh water right on the reef before heading back to the boat. It’s a tiny habit that saves you time, money, and protects the marine environment by avoiding chemical runoff.

Checklist You Can Print & Stick on Your Boat

☐ Unload & disassemble
☐ Rinse in soapy water
☐ Scrub with soft brush
☐ Dry completely
☐ Apply silicone spray & mineral oil
☐ Reassemble & test
☐ Store in sealed bag with desiccant

Keep this list visible to stay consistent and avoid costly repairs.

If this guide helped you keep your speargun in top shape, subscribe to the Reef Ready Blog newsletter for more quick‑fire tips, gear reviews, and reef‑friendly tricks. Share the guide with a diving buddy who could use a fix—happy hunting out there!