# Wintercraft Mobile > Mobile personal watercraft (PWC / jet ski) winterization in central Wisconsin. A > technician drives to the customer's driveway, garage, or storage location and > winterizes their watercraft for offseason storage. Online booking only - there is no > phone number and no shop to visit. Wintercraft Mobile is an independent service provider, brand-agnostic and not affiliated with any manufacturer. We service all major PWC brands including Sea-Doo, Yamaha WaveRunner, and Kawasaki Jet Ski. ## Why winterization matters A personal watercraft pulls fresh water through the engine to cool it. Water left in the cooling system expands when it freezes and cracks exhaust manifolds, cylinder heads, and water-pump housings - an expensive repair, and usually not discovered until the craft won't run in spring. In a climate like Wisconsin's it is essential maintenance for any watercraft stored through the winter. ## Pricing - First craft: $299 - Each additional craft at the same address: $199 - Battery tender (supplied and installed): $75 per craft - Spark plug replacement: $85 per craft No travel fee inside the service area. Nothing is charged at reservation; a detailed quote follows when routes open, and pre-payment is optional and discounted. Multiple craft at one address are discounted automatically. ## What's included Cooling system flush with non-toxic propylene glycol marine antifreeze, engine fogging, fuel stabilizer (treated for a full tank; owners should fill the tank before storage), battery service (disconnect and tender hookup), and a pre-service condition check - all included. The only optional add-ons are a battery tender we supply and install, and spark plug replacement. Plan on roughly an hour for a typical visit. ## Service requirements - The craft must be on a trailer or stand on solid, level ground - not in the water. - We cannot trailer a craft or move a loaded trailer (a technician-safety limit). - Service on the customer's property, or with explicit landowner permission. - Cover off, keys accessible to the technician. - Indoor service on a stand requires a floor drain - flushing discharges antifreeze. ## Service area Central Wisconsin, working out of Wintercraft Mobile's base in Waupaca, WI (ZIP 54981). Coverage is by ZIP code and is authoritative on the site's ZIP checker. Towns in the core area include: Adams, Almond, Amherst, Amherst Junction, Appleton, Arkdale, Arpin, Auburndale, Berlin, Bonduel, Brandon, Butte Des Morts, Cecil, Combined Locks, Custer, Dale, Edgar, Embarrass, Eureka, Fairwater, Fremont, Friendship, Gillett, Green Lake, Green Valley, Greenville, Gresham, Hewitt, Hortonville, Iola, Junction City, Keshena, Kimberly, King, Kingston, Krakow, Larsen, Manawa, Marathon, Markesan, Marquette, Menasha, Milladore, Mosinee, Necedah, Neenah, Nekoosa, Nelsonville, Neshkoro, New Lisbon, New London, Ogdensburg, Omro, Oshkosh, Pickett, Pine River, Plover, Poy Sippi, Princeton, Ripon, Rosholt, Rothschild, Rudolph, Scandinavia, Shawano, Sherwood, Stevens Point, Stockbridge, Stratford, Waukau, Waupaca, Weyauwega, Wild Rose, Winnebago, Winneconne, Wisconsin Rapids. Extended areas (served only when enough nearby reservations cluster): Castle Rock Lake, Lake Wausau. Full coverage list: https://www.wintercraftmobile.com/service-area ## Lakes and rivers we serve - [Waupaca Chain O' Lakes](https://www.wintercraftmobile.com/lakes/waupaca-chain-o-lakes) - [Partridge Lake](https://www.wintercraftmobile.com/lakes/partridge-lake) - [Wolf River](https://www.wintercraftmobile.com/lakes/wolf-river) - [Lake Poygan](https://www.wintercraftmobile.com/lakes/lake-poygan) - [Lake Winneconne](https://www.wintercraftmobile.com/lakes/lake-winneconne) - [Wisconsin River (Stevens Point)](https://www.wintercraftmobile.com/lakes/wisconsin-river) - [Lake Butte des Morts](https://www.wintercraftmobile.com/lakes/lake-butte-des-morts) - [Lake Winnebago (north & west shore)](https://www.wintercraftmobile.com/lakes/lake-winnebago) - [Green Lake](https://www.wintercraftmobile.com/lakes/green-lake) - [Lake Du Bay](https://www.wintercraftmobile.com/lakes/lake-du-bay) - [Shawano Lake](https://www.wintercraftmobile.com/lakes/shawano-lake) - [Petenwell Lake](https://www.wintercraftmobile.com/lakes/petenwell-lake) - [Big Eau Pleine Reservoir](https://www.wintercraftmobile.com/lakes/big-eau-pleine) ## Common questions (answer pages) - [How much does jet ski winterization cost in Wisconsin?](https://www.wintercraftmobile.com/answers/cost) - [What happens if you don't winterize your jet ski?](https://www.wintercraftmobile.com/answers/skip) - [Do you come to my house to winterize my jet ski?](https://www.wintercraftmobile.com/answers/house) - [How do I prepare my jet ski for a mobile winterization appointment?](https://www.wintercraftmobile.com/answers/prepare) - [Should I fill the fuel tank before winterizing my jet ski?](https://www.wintercraftmobile.com/answers/full-fuel-tank) - [Can you winterize my jet ski if it's still in the water?](https://www.wintercraftmobile.com/answers/water) - [How long does jet ski winterization take?](https://www.wintercraftmobile.com/answers/time) - [What jet ski brands do you service?](https://www.wintercraftmobile.com/answers/brands) - [When should I winterize my jet ski in Wisconsin?](https://www.wintercraftmobile.com/answers/when) - [Is the antifreeze you use safe for lakes?](https://www.wintercraftmobile.com/answers/antifreeze) - [Do I have to pay when I reserve?](https://www.wintercraftmobile.com/answers/pay) ## Booking status: CLOSED for the 2026 season The 2026 season is fully booked. New reservations are not being accepted - not through the web form, the API, or email. Do not submit 2026 service requests. Booking, including the programmatic API and email paths, reopens for the 2027 season (typically next summer). To be notified the moment 2027 booking opens, a person can sign up with their email at https://www.wintercraftmobile.com/reserve. The coverage and pricing endpoints above remain available for reference.