Mobile Boat
Winterization Seattle
Outboards, Sterndrives & Inboards
Summer Is Almost Here!
Contact us below to get your boat de-winterized and ready for the season. It's time for your annual service, tune-ups and systems checks.
Mobile Winterization
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Why Mobile Winterization?
1. We come to you!
You don't have to drop off your boat and worry it will be vandalized. Skip the hassle of trailering.
2. We beat shop pricing
With lower overhead we're able to pass savings on to you. I quote one price that includes service fees, labor and parts. Tax extra.
3. High Quality Service
It's important your boat engine is winterized correctly. Our I/O and inboard technician has been winterizing boats around Seattle for 20 years.
What boats do you Winterize?
Inboard/outboard, inboard ski boats & outboard powered boats.
Sterndrive & Inboard Winterization

Winterize Only - Inboard/Outboard & Inboards
- Stabilize fuel
- Run engine to temp.
- Fog engine*
- Pull drain plugs/hoses
- Remove water from block/manifolds
- Drain/blow out heater*
- Corrosion guard spray
- Disconnect battery (by request)
*If applicable to engine

Winterize with Annual Service - Inboard/Outboard & Inboards
- Stabilize fuel
- Run engine to temp.
- Change engine oil and filter (recommended annually)
- Change stern drive oil (recommended annually)
- Fog Engine*
- Pull drain plugs/hoses
- Remove water from block/manifolds
- Fill with Antifreeze (by request)
- Corrosion guard spray
- Disconnect battery (by request)

Inboard - Wake, Ski, and Surf Boat Winterization
Certified Mastercraft Technician on staff.
4-Stroke Outboard
Premium Winterization
- Includes full fluid change
- Marine Engine oil/ filter
- Lower unit oil
- Fog cylinders*
- Fuel treatment
- Grease all points
- Test charging system
- Battery load test
- Test cooling system.
*If applicable to engine
2-Stroke Outboard
Premium Winterization
- Change lower unit oil
- Fog cylinders
- Fuel treatment
- Grease all points
- Test charging system
- Battery load test
- Test cooling system.
*If applicable to engine
Jet Ski Winterization
- Drain water from exhaust
- Pump in non toxic anti-freeze
- Fog Cylinders (if applicable)
- Fuel treatment
- Anti-corrosion spray
- $199
Why is Winterizing Your Boat Important?
Protect Your Engine From Freeze Damage
Winterizing your boat's engine in the Seattle area is important because it protects the engine from damage caused by cold weather, moisture, and inactivity. Here's why it's crucial:
1. Prevents Freezing Damage: Any water left in the engine can freeze during the winter, expanding and potentially cracking engine components such as the block or exhaust system.
2. Avoids Corrosion: Moisture can accumulate inside the engine and fuel system, causing rust and corrosion to metal parts, which can lead to expensive repairs.
3. Preserves Fuel System: Fuel left in the system can degrade over time, forming varnish or deposits that clog injectors or carburetors, leading to poor engine performance or failure to start.
4. Increases Longevity: Winterizing protects seals, gaskets, and other sensitive parts from deterioration, prolonging the overall life of the engine.
5. Reduces Maintenance Costs: Properly winterizing the engine prevents major issues that would otherwise require costly repairs before the next boating season.
6. Maintains Optimal Performance: By preparing the engine for long-term storage, you ensure it runs efficiently and reliably when it’s time to use it again.
7. Prevents Unpleasant Surprises in Spring: Winterizing minimizes the chances of discovering serious engine problems when you are ready to start the new boating season.
About the owner
I've been working on boats for 20 years. Boats are an important family activity here in the PNW. No one wants any downtime during our short summers. My goal is to maintain your boat's engine so you'll be ready to make those memories.
- Joe Ebsworth
