Marks Boat Services

08/09/2026

Hit the 1000 mark today!

08/04/2026

***FOR SALE!***
Asking $7000
A well-equipped 1999 Sea Ray 215 Express Cruiser powered by a 5.0L MerCruiser (636 hours) paired with an Alpha One outdrive featuring a brand new upper unit. This is a great all-around cruiser that's equally at home spending the day on the water or staying out overnight.
Features:
5.0L MerCruiser
Alpha One outdrive with brand new upper
New gimbal bearing
Cuddy cabin with dinette that converts into a bed
Enclosed changing/toilet area
Cabin sink
Cockpit table
Bimini top with full camper enclosure
Additional full cockpit cover
Transom shower
Telescoping boarding ladder
4 built-in rod holders
Garmin GPS
VHF marine radio
Dual batteries (one brand new)
Sale includes a galvanized trailer, spare propellers, and other boating essentials, making it ready to hit the water.
Located in Sussex, WI.

08/03/2026

Another new SEI upper installed and tested...

08/03/2026

SOLD! 🎉
Another one heading to its new owner.
Thinking about selling your boat? Let us do the work. We handle the marketing, showings, paperwork, and help connect your boat with qualified buyers.
If you're ready to sell, send us a message. We'd be happy to help!

07/31/2026

***SOLD!***

2000 Crownline 238 DB powered by a Volvo Penta 7.4L V8 with a DuoProp outdrive. This is an exceptionally spacious deck boat with seating for up to 14 people, making it a great option for family outings, cruising, or entertaining on the water.
Features include:
Volvo Penta 7.4L V8
DuoProp outdrive
14-person capacity
Enclosed head (bathroom)
Fresh water system
Wet bar
Bimini top
Full storage cover
Snap-in carpet
GPS
Docking lights
Front and rear boarding ladders
Side entry door
Large amount of storage throughout

In 2019, over $10,000 was invested in the boat, including a new engine, trailer bearings, fuel pump, new carpet, and additional maintenance items.
The ECM shows 477 hours, with fewer than 100 hours on the replacement engine.

07/30/2026

2 new listings coming soon, just prepping for sale!

2000 Crownline 238db, 7.4 Volvo-Penta w/drop duo-prop.

1999 Sea Ray 215 Express Cruiser, 5.0 Mercruiser and new lower unit

Act fast, these are going to be priced aggressively for quick sale!

07/27/2026

🔥 Deal of the Month! 🔥

Take advantage of one of the best offers of the season! Choose from FREE indoor, heated winter storage or FREE delivery anywhere in the U.S. with purchase of this like new Harris 250 Solstice! Enjoy the rest of this boating season, then let us store it for the winter—or have it delivered right to your lake. Don't miss out on this limited-time offer!
Click on pic for full listing!

2023 Harris Solstice 250 Mercury Verado 300 - 35 Hours $107,900Delivery available anywhere in the U.S2023 Harris Solstice 250 Tritoon | Mercury Verado 300 | Trailer IncludedOnly 35 hours and loaded with premium options, this 2023 Harris Solstice 250 is about as close to new as you can get without th...

07/25/2026

***NEW LISTING***

2001 Chaparral 235 SSI
MerCruiser 350 MAG MPI • Bravo 3 Outdrive

A lot of boat for the money. This Chaparral is in very good condition for its age, has been well cared for, and is ready for the water.
Features: • MerCruiser 350 MAG MPI • Bravo 3 dual-prop outdrive • Bimini top with full camper enclosure (never used, still like new) • Walk-through windshield • Large swim platform • Pop-up cleats • Snap-on cockpit covers • Full storage cover • Snap-in carpet • Wet bar • Cockpit table • Small cuddy cabin with dinette • Depth finder • Dual batteries with onboard charger • Matching tandem-axle trailer
Includes life jackets, anchors, ropes, and other boating essentials.

Located in Sussex, WI.

Asking $12,900

07/25/2026

Did you know if you take me salmon fishing on your boat after I fix it you get a discount?
You do now!
Only if I catch one, and if you clean it though...
Thanks Michael Bryan, looking forward to the big one next time!

07/24/2026

Fresh to the market, listing coming soon!
2001 Chaparral 235ssi. Interested? Act fast, this one won't be around long!
Call, message or text, 262-933-0713

Have a boat to sell? Let's chat!