All-Inclusive Winter Care for Sterndrive & Inboard Boats

I/O and inboard boats have the most water sitting in the engine — which is exactly what cracks blocks if winterization is sloppy.

The Shadow Boat Concierge handles the entire off-season for sterndrive & inboard boat owners across the Spokane and North Idaho region — pickup anywhere, careful winterization, storage, full detail, spring summerize, and delivery back to the water with a full tank.

How the Concierge works

1. We pick it up. We pick up from your dock, marina, or driveway across the Spokane and North Idaho region — your dock, marina slip, driveway, or current storage lot. You never hitch a trailer.

2. We winterize it carefully. Full winterization and oil/filter change by our experienced marine techs (see below).

3. We store it. Your choice of secure outdoor, covered with shrink wrap, or a fully enclosed indoor unit — behind a gated, camera-monitored facility with a 20-year, zero-break-in record.

4. We detail it. Wash, hull acid wash, and a full detail so it comes back better than it left.

5. We summerize and bring it back. Spring service done, trailer checked, delivered to your dock with a full tank of fuel on the day you choose.

We take winterization seriously

This is the part nobody should cut corners on, and we don't. Every boat gets a meticulous, multi-point winterization: fuel stabilized, engine fogged, block, manifolds and water pump fully drained, oil and filter changed, grease fittings lubed, and your battery pulled and stored indoors on a maintainer. We're methodical, we double-check our work, and we document every step — because a single missed drain plug can cost someone their whole season. We won't make promises about the weather; we just do the job right, the careful way, every time.

Sterndrive & inboard care

We fully drain the block, manifolds, and risers, inspect the drive bellows, change the gear lube, and protect the closed or raw cooling system. This is the careful, methodical work that prevents a cracked block — and we document all of it.

Three levels — built around your boat

• Captain — pickup, careful winterization, secure outdoor storage, spring service, and full-tank delivery.
• Admiral — everything in Captain, plus covered storage with shrink wrap, full detail, 100-hour engine service, and a mid-winter photo check-in.
• Commodore — everything in Admiral, in a private enclosed indoor unit, with priority spring launch scheduling.

We tailor a quote to your boat and the season you want — request yours below.

Add-on: keep your trailer here through the summer too, so it's not taking up your driveway while the boat's on the water.

Limited spots each season

We take a limited number of Concierge boats each season so every one gets real, mechanic-level attention. When the season fills, the next opening is a year out.

What owners say

"Such a great business idea. The staff is great and carry out the plans quickly without fail. My boat was picked up from my house on short notice and whisked away to be serviced and stored over the winter at their facility. I definitely approve." — BrookeSean Welsh, five-star Google review

"They picked up our boat from Loon Lake, cleaned it, winterized, and are storing it indoors over the winter. Couldn't have been an easier process." — Kelli J., Loon Lake, five-star Google review

"They go above and beyond — a high level of service and care in the maintenance and detailing. We will continue to use them." — B G, five-star Google review

Frequently Asked Questions