On a summer Saturday at Lake Granbury, the most common "key" emergency on the water is not really a key at all. It is a coiled lanyard that went over the side, or a coded key cap that stayed in a cooler at the house, or a trailer lock whose key nobody packed. Some of those are a two-minute fix. One of them is a job only a dealer can do. Call or text (817) 214-2934 with the make, model and year and we will tell you which one you have before anybody drives anywhere.
Quick Answer
As of September 2026 around Lake Granbury, what a replacement personal watercraft key costs depends on what kind of key the craft uses. A plain lanyard or clip is a parts-counter purchase, not a locksmith job. A coded key that must be programmed to the craft falls in our $80–$350 programming band where the system is one we support, and on some makes and years it is dealer-only, which we confirm before quoting. The trailer side is ordinary lock work: rekeying a coupler, tongue box, or hitch lock is $50–$150 per lock, and getting into a locked tow vehicle at the ramp starts at $50–$75. Mobile service inside our 25-mile radius is included.
First, Work Out Which Kind of Key You Have
Almost every call about a lost watercraft key goes better once this is settled, because the three types have almost nothing in common.
1. A plain lanyard or safety clip
Many personal watercraft use a lanyard with a clip or cap that fits over a post or switch near the handlebars. Pull it off and the engine stops. On a great many craft, especially older ones and base models, that clip is only a safety switch. It is not coded to the craft, and any clip of the right shape for that maker will work.
If this is what you lost, the answer is a replacement lanyard from a dealer or a marine parts counter, and it is not a locksmith job. We will tell you so on the phone rather than charge you to find out.
2. A coded key that has to be programmed
Some makers put an electronic code in the lanyard cap. The best-known example is Sea-Doo's D.E.S.S. (Digitally Encoded Security System), where the cap carries a chip and the watercraft only starts with caps that have been programmed to its electronic module. Newer Sea-Doos use a radio-frequency version of the same idea, and the maker also offers a speed-limited learning key for new riders.
A coded key is a real replacement job. A new cap has to be programmed to the craft, and whether that can be done at the dock or requires the maker's own dealer software depends on the model and year.
3. A remote or proximity transmitter
Some newer and higher-end watercraft use a remote transmitter, sometimes with a low-speed mode, or a proximity-style system similar to a car's push-button start. These behave more like a car's smart key than a lanyard, and replacement is the most model-specific of the three.
If you are not sure which you have, photograph the lanyard post or switch and the key or cap if you still have one, and text it to us. That photograph answers the question faster than any description.
What It Costs Around Lake Granbury
| Job | Typical Granbury range (September 2026) | Notes |
|---|---|---|
| Plain lanyard or safety clip replaced | Not a locksmith job | Dealer or marine parts counter; we will say so up front |
| Coded PWC key programmed, a working key available | $80–$350 where supported | Same programming band as our automotive work |
| Coded PWC key, all keys lost | $80–$350 where supported; some systems dealer-only | Feasibility confirmed on the phone first |
| PWC trailer coupler, tongue box or hitch lock rekeyed | $50–$150 per lock | Cheaper as a batch than one at a time |
| Cut a spare to a trailer lock that already works | $75–$125 | Bring the working key |
| Key originated for a trailer lock with nothing working | $100–$300 | Decode the cylinder, cut, test |
| Tow vehicle unlocked at the ramp with keys inside | From $50–$75 | See car lockout service |
| Tow vehicle key, transponder or smart key | $80–$350 | Standard automotive pricing applies |
| Mobile service anywhere inside our 25-mile radius | Included in the quote | No separate trip or call-out fee |
Those are the same bands published on our boat, ATV and RV key cost guide and our transponder key programming service page. We deliberately do not publish a single "jet ski key" price, because a $20 lanyard and a coded key that needs dealer software are not the same product, and pretending otherwise is how customers get charged for a trip that could not have fixed anything.
When It Is Dealer-Only, and Why We Say So First
Some watercraft coded-key systems can only be programmed with the maker's own diagnostic software, which is sold to franchised dealers rather than to independent shops. On those models, a mobile locksmith cannot produce a working coded key no matter what the equipment in the van is.
When that is the case we tell you on the first call, before anyone drives to the lake. The honest routes then are:
- Take the craft to a dealer that services that brand, with proof of ownership.
- Use a spare coded key if you have one, and have the dealer program a new spare at your next service.
- Keep the craft on the trailer and let us handle whatever is locked on the trailer and tow vehicle in the meantime, which is usually the thing actually stranding you.
For the craft we can program, we confirm the make, model, year and hull identification number first, then quote the job. The number does not change once we arrive.
The Ramp Problem Is Usually the Trailer, Not the Watercraft
The calls we actually run at the lake are more often about everything around the watercraft than the watercraft itself:
- The coupler lock that stops anyone hitching your trailer. Its key was on the ring that is now at the bottom of the lake, or at home.
- The tongue box holding the spare lanyard, the registration, and the tie-down straps.
- The tow vehicle, locked with the keys on the seat while two people were backing a trailer down the ramp.
- A hitch pin lock that has rusted solid after a season of being dunked at the ramp.
All of those are ordinary lock and automotive work, and all of them are things we do at the ramp. If the trailer and tow vehicle keys are the problem, see our guide to a lost boat key at the ramp, which walks through the ramp-side version of this call in more detail.
Water and Keys: What Actually Happens
People assume a key that went in the lake is ruined. A plain metal key is fine once dried. A coded cap is more complicated, and a remote transmitter is the most fragile of all.
A plain lanyard or metal key survives immersion. Dry it, rinse it with fresh water if it went into anything other than the lake, and use it.
A coded lanyard cap is usually sealed, but a cap that has been wet repeatedly for years can fail. If a craft that started yesterday will not recognize its cap today, the cap is a candidate, though so are the post and the wiring underneath it.
A remote transmitter that went in the water should be opened, dried, and have its battery removed as soon as possible. The same first-hour steps we describe for a car fob in our guide to a key fob that got wet apply here. Board-level water damage on a transmitter is the same problem we see on trucks, covered in our water-damaged Tahoe and Yukon fob guide.
Keep the Lanyard Where the Rules Put It
Two points worth knowing on this lake, because they bear on what happens to your key.
First, the lanyard is a safety device before it is a key. Texas Parks and Wildlife Department boating rules require a personal watercraft operator to have the lanyard attached when the craft is equipped with one, and the U.S. Coast Guard engine cut-off switch rule applies to many smaller recreational vessels. A lanyard attached to your wrist or life jacket is also a lanyard that is much harder to lose off the side.
Second, Texas requires boater education for operators born on or after September 1, 1993, including personal watercraft operators, through TPWD's boater education program. Nobody asks the locksmith about that, but it is worth knowing before you hand the craft to a teenager with the only coded key you own.
Buying a Used Watercraft? Ask About the Keys Before You Pay
Used personal watercraft change hands constantly around a lake like this one, often in a driveway with cash and a bill of sale. The key question is easy to skip and expensive to get wrong.
Count the coded keys, and test every one. On a coded system, ask how many keys the craft has and start the engine with each of them before money moves. A seller who hands over one cap has handed over the only proof you have that the craft will run after they leave.
Ask whether any keys are unaccounted for. On most coded systems, a key that was programmed to the craft keeps working until it is removed from the craft's memory. If the previous owner's teenager still has a cap in a drawer, it may still start your watercraft.
Check the paperwork against the hull. The hull identification number on the transom should match the title and registration. Texas watercraft titling and registration run through Texas Parks and Wildlife Department, and a mismatch is worth resolving before the sale, not after. It is also the first thing any locksmith or dealer will ask to see before making you a key, so a clean match now saves a delay later.
Look at the trailer too. Trailer coupler locks and tongue boxes are sold with the rig and nobody knows where their keys went. Having them opened and rekeyed the week you buy the rig is cheaper than having them opened in a hurry at the ramp on the first Saturday.
Ask about the learning key. If the craft came with a speed-limited learning key, find out which cap it is. Owners mix them up, and a craft that "will not go faster than a crawl" is sometimes just running on the learning key.
What to Send Us Before Anyone Drives Out
Photographs answer most of the question. Text these to (817) 214-2934:
- Make, model and year of the watercraft, and the hull identification number if you can read it.
- A photo of the lanyard post or start switch on the craft.
- Any key, cap, or transmitter you still have, even a broken one.
- Every lock on the trailer you need opened or keyed: coupler, tongue box, hitch pin.
- Where you are: which ramp or marina, which lake house, or which storage lot.
- Proof of ownership: the registration or title. We check it on every job, for your protection and everyone else's.
We come to Lake Granbury ramps and marinas, the lake houses in DeCordova and Pecan Plantation, and storage lots anywhere inside our 25-mile radius.
One Habit That Saves the Expensive Version
If your watercraft uses a coded key, own two programmed keys, and store the spare somewhere that is not the boat, the dock box, or the truck at the ramp.
This matters more on a coded system than anywhere else. Adding a spare while you still have a working key is the cheaper version of the job on almost every system, and on some systems it is the only version that avoids a trip to the dealer. The customer who loses the only coded key on a dealer-only system loses the watercraft for however long the dealer's service queue is in July.
Frequently Asked Questions
How much does a jet ski key replacement cost around Lake Granbury? It depends on the key type. A plain lanyard or safety clip is a parts-counter purchase, not a locksmith job. A coded key that must be programmed to the craft falls in our $80–$350 programming band where the system is supported, and some makes and years are dealer-only. We confirm which applies on the phone before quoting.
Can a locksmith program a Sea-Doo D.E.S.S. key? It depends on the model and year. Some coded watercraft keys require the maker's own dealer software, and on those a mobile locksmith cannot produce a working key. We check the exact model before anyone drives out and tell you if a dealer is the only route.
I lost the lanyard off my WaveRunner. Do I need a locksmith? Often not. On many craft the lanyard clip is only a safety switch and is not coded, so a replacement from a dealer or marine parts counter works immediately. Send a photo of the post or switch and we will tell you which kind you have.
My key cap went in the lake. Is it ruined? A plain metal key or clip is fine once dried. A coded cap is usually sealed but can fail after years of repeated wetting. A remote transmitter should be opened, dried and have its battery removed right away.
Can you open my trailer's coupler lock at the ramp? Yes. Coupler, tongue box and hitch locks are ordinary lock work. We can open, cut a key for, or rekey them at the ramp, and rekeying falls in our $50–$150 per lock band.
Do you come to Lake Granbury ramps and marinas? Yes. Mobile service anywhere inside 25 miles of Granbury is included in the quote with no separate trip fee, including public ramps, marinas, lake houses in DeCordova and Pecan Plantation, and storage lots.
What proof of ownership do you need for a watercraft? The registration or title, matched to the hull identification number. We check it on every job before any key is made.
Should I buy a spare coded key? Yes. Adding a spare while a working key exists is the cheaper job on almost every system, and on some systems it is the only way to avoid a dealer visit if the only key is lost.
Tell Us the Model First
Most of the cost of a watercraft key call is decided by one fact: which kind of key the craft uses. Send us the make, model and year, and a photo of the lanyard post, and you will know whether this is a two-minute parts purchase, a job we do at the dock, or a dealer visit. Call or text (817) 214-2934, weekdays 8:00 AM to 7:00 PM, Saturdays 8:00 AM to 5:00 PM, with 24/7 emergency availability for lockouts. You can also request service through our contact page, or read what happens when a boat or ATV key turns but the engine will not crank.
Sources
- Texas Parks and Wildlife Department — boater education
- U.S. Coast Guard Boating Safety — engine cut-off switch FAQ
- Brazos River Authority — Lake Granbury
- National Association of State Boating Law Administrators
- Texas Department of Public Safety — Private Security Program
- Associated Locksmiths of America