When you browse boats personal watercraft listings, the first decision is often whether you need a complete boat or just the power to hang off the back of one. The 21' 1990 Supra Mariah Boat and the 3.5HP 2 Stroke Gas Outboard Motor Manual Start For Dinghy Small Fishing Boat sit on opposite sides of that question. One is a ski boat; the other is a compact outboard. Their prices are far apart because they solve different problems.
Quick Verdict
If you need a full boat and plan to enjoy classic inboard ski-boat rides with friends, the 1990 Supra Mariah is the clear choice. It's a used, one-owner boat stored indoors, ready with its trailer and engine power. If you already have a small boat, the outboard is the smarter, far less expensive way to add power without buying a whole new boat.
Specs at a Glance
| Product | Listed Price | Condition | Best Suited For | Key Specs |
|---|---|---|---|---|
| 21' 1990 Supra Mariah Boat | USD 8,000.00 | Used | Complete ski boat for lake use | 21-foot, inboard engine, 11-20 gallon fuel capacity |
| 3.5HP 2 Stroke Gas Outboard Motor Manual Start For Dinghy Small Fishing Boat | USD 157.77 | New | Adding power to a dinghy or small fishing boat | 3.5 HP, manual start, 2-stroke, 40cm adjustment rod |
Where the Supra Mariah Wins
- You want a complete boat, not just a motor.
- You need a ski boat for lake use.
- You appreciate details like all stainless hardware and fresh gel.
- You want the benefit of a dealer inspection before purchase.
Where the 3.5HP Outboard Wins
- You need portability and quick setup on a small boat.
- You want a new motor with simple operation.
- You prefer a manual-start motor for an existing small hull.
- You want a package that includes the motor, water pump impeller, starter, funnel, mixing bottle, and instructions.
21' 1990 Supra Mariah Boat
This is a one-owner, used ski boat that has been stored indoors, with all stainless hardware, new gel, and a new rubber rail. The upholstery and carpet are good, and the boat is powered by a 351 PCM Cleveland Block with 785 hours. A dealer inspection and a Trail Master trailer with new tires round out the package. If you want a complete hull, this is a full rig rather than a lone motor. The main limitation is age and hours: at 785 hours and more than 30 years old, this is a used boat with the maintenance routine that comes with an older engine, and it needs a good home.
3.5HP 2 Stroke Gas Outboard Motor Manual Start For Dinghy Small Fishing Boat
This outboard is a compact 2-stroke motor. The aluminum alloy construction offers high hardness with anti-corrosion and anti-rust properties, and the CDI ignition keeps the starting routine simple. At 12 km/h with four people, it's clearly meant for small craft and gentle trips. The package extras include a water pump impeller, starter, funnel, fuel oil mixing bottle, and an English instruction sheet. The practical limit is that it doesn't come with a hull; you need a dinghy or small fishing boat to use it. You'll also need to mix fuel at a 35:1 oil ratio because it's a 2-stroke.
Final Choice by Use Case
Choose the Supra Mariah if you're ready for a full lake ski boat and you want to show up with everything needed for a day of skiing. The USD 8,000.00 price is an investment in a complete package, and the age and hours are the trade-off. Choose the 3.5HP outboard if you already have a small hull and just need trustworthy power. For USD 157.77, you get a new, compact motor that can push a small boat without the storage and maintenance footprint of a larger inboard.
