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. 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 24 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 24 hp

Small kicker / portable 4-strokes
$140

4-Stroke over 25hp – 89 hp

Mid-range 4-stroke outboards
$180

4-Stroke over 90 hp – 149 hp

Larger 4-stroke outboards
$195

4-Stroke 150 hp and up

High-horsepower outboards
$250
Listed prices cover labor only. Parts and fluids—including oil, oil filters, spark plugs, and fuel filters—are charged separately. Required parts and fluids vary by engine make and model, operating hours, and manufacturer-recommended service intervals.

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
Listed I/O and inboard winterization prices cover labor only. Service includes draining manifolds and risers, flushing the cooling system with antifreeze, and changing outdrive lower-unit oil, where applicable. Parts and fluids—including antifreeze, gear oil, engine oil, and filters—are charged separately. Required service items vary by engine and drive configuration, operating hours, and manufacturer-recommended service intervals

Wakeboard & Surf Boats with Ballast

Most Complex

Winterization with oil change

Includes ballast tanks, plumbing, and pumps
$695-895

Transmission fluids

Recommended annual service
$175

V-Drive oil change

For V-drive equipped boats
$175

Impeller replacement

Range reflects pump location and complexity
$165-415
Listed wake and surf boat winterization prices cover labor only. Service includes winterizing the engine and ballast system to help protect pumps, plumbing, and ballast tanks or bags from freeze damage. Pricing reflects the additional time and complexity of these systems. Parts and fluids—including antifreeze, engine oil, and filters—are charged separately and vary by boat configuration, operating hours, and manufacturer-recommended service intervals.
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 from September 1st up to November 1st. 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. (oil, lubricants, antifreeze, stabilizer, fogging oil). Parts like oil filters, fuel filters, spark plugs, gear oils, rodent away products, 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. Our current indoor storage buildings protect boats from outdoor elements such as snow, sleet, and hail, but they are not heated above freezing. Water left in engines, cooling systems, ballast systems, or plumbing can freeze and cause damage, even indoors. Winterization is required for all boats with systems vulnerable to freezing.
Heated indoor storage is coming soon, with options for wake and surf boats, inboard ski boats, and I/O boats. Winterization will still be required as a precaution against extended power outages or heating system failures during Minnesota’s harsh winters.

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!