Marine Services / WINTERIZATION

Boat Winterization in Annandale, MN

Professional winterization for outboards, I/O, inboards, and wakeboard/surf boats. Oil change, fuel conditioner, antifreeze, fogging oil, and battery storage – protecting your boat engine through Minnesota winters.

Schedule Winterization → View Pricing

All Engine Types From $110 Bundle w/Storage Spring-ready

2-Stroke Outboard

$110+

4-Stroke Outboard

$140+

I/O Inboard

$250+

Wake / Surf Boat

$695+

Protect Your Investment

The Most Important Service Your Boat Needs

A single freeze with water still in the engine block can crack it! That’s a repair that costs more than a decade of professional winterization. Charter Marine winterizes every engine type, from PWC two-strokes to inboard wakeboard boats with ballast systems.

Oil Change

Upper and lower unit oil drained and replaced. Old oil left over winter can damage internal components.

New Oil Filter

Fresh filter installed so contaminants from the season aren’t sitting in your engine all winter.

Fuel Conditioner

Stabilizer added to fuel system to prevent gum, varnish, and ethanol breakdown over the off-season.

Antifreeze (as needed)

Marine-grade antifreeze runs through the cooling system to displace any water that could freeze.

Fogging Oil (as needed)

Sprayed into cylinders to coat internal engine surfaces, preventing corrosion during long-term storage.

Battery Storage

Battery disconnected and stored to extend life. Cold weather and parasitic drain can ruin a battery.

PrICING

Winterization Pricing by Engine Type

Pricing varies by engine configuration, horsepower, and complexity. Below are our standard rates for the most common boat types. Quoted prices are for labor and standard fluids. Parts (oil filters, plugs, fuel filters, impellers, etc.) are additional and vary by engine. We’ll itemize parts on your quote.

Outboard Motors & PWCs

Most Common

PWC – 2 and 4 stroke

Personal watercraft / jet skis

$230

2-Stroke up to 25 hp

Small kicker / trolling motors

$110

2-Stroke 25–89 hp

Mid-range outboards

$130

2-Stroke 90 hp and over

Larger 2-stroke outboards

$185

4-Stroke up to 25 hp

Small kicker / portable 4-strokes

$140

4-Stroke over 25 hp

Mid-range 4-stroke outboards

$180

4-Stroke over 90 hp

Larger 4-stroke outboards

$195

4-Stroke 150 hp and up

High-horsepower outboards

$250

Pricing covers labor and fluids. Parts (filters, plugs, fuel filters) extra and quoted before work begins.

Inboard & I/O (Stern Drive)

Cruisers & Runabouts

I/O – 4 cylinder

4-cylinder stern drives

$250

I/O – 6 & 8 cylinder

V6 and V8 stern drives

$295

Inboard – no ballast

Direct-drive inboard engines

$350

I/O with Forward Drive & Ballast

Priced same as wake/surf boats – see below

$695-895

I/O and inboard winterization includes manifold and riser drain, antifreeze flush through the cooling system, and outdrive lower unit oil change.

Wakeboard & Surf Boats with Ballast

Most Complex

Winterization with oil change

Includes ballast tanks, plumbing, and pumps

$695-895

Transmission flush

Recommended annual service

$175

V-Drive oil change

For V-drive equipped boats

$175

Impeller replacement

Range reflects pump location and complexity

$165-415

Wake and surf boats require ballast system winterization to prevent damage to pumps, plumbing, and ballast bags. Pricing reflects the additional time and complexity.

Service Area

Winterizing Boats Across Central Minnesota

Our shop is in Annandale, central to lake country. Customers come from throughout the region.

Annandale

Maple Lake

South Haven

Buffalo

Monticello

Clearwater

Cokato

Dassel

Litchfield

Kimball

St. Cloud

Big Lake

Don’t see your city? Most service customers happily make the drive once a year for proper protection.

Common Questions

Winterization Questions?

Schedule winterization for late September through mid-October. The first hard freeze in central Minnesota typically arrives late October to early November, and your boat needs to be winterized before that, not after. Once water in your engine block freezes, the damage is done. Books fill up in October, so earlier is always better.

Pricing covers labor and standard fluids (oil, antifreeze, stabilizer, fogging oil). Parts like oil filters, fuel filters, spark plugs, and impellers are quoted separately based on your engine. We’ll itemize parts on your written quote so there are no surprises.

Wakeboard and surf boats with ballast systems have significantly more plumbing, pumps, and water-holding components than other boats. All of it needs to be drained or flushed with antifreeze to prevent freeze damage. Ballast bags, ballast pumps, ballast plumbing, and surf gates all add labor compared to a standard inboard. The pricing reflects the complexity.

Yes. PWC winterization (both 2-stroke and 4-stroke) includes the same complete process as boat winterization – fuel stabilization, fluid changes, fogging, and battery storage.

Yes. Indoor storage is climate-protected, not heated to room temperature. If temperatures drop below freezing in the storage building (they will), any water in your engine will freeze just like it would outdoors. Winterization is required regardless of where the boat is stored.

Don’t Wait for the First Freeze

Winterization slots fill up by mid-October every year. Schedule now to protect your investment and avoid the rush.

Schedule Winterization → Call now!