Choosing between two new marine inboard engines can be disorienting when one is a full-size V10 and the other is a small four-stroke for RC use. Both fall under marine engines propulsion, but they serve completely different boats. The Dodge V10 8.0L Indmar is a never-fired, zero-hour inboard for a real hull. The OS Max FS-61 is a new four-stroke glow engine made for model-boat builds. Here's how to decide between them without overthinking the spec sheet.
Quick Verdict
If you're repowering a full-size inboard and want a new engine with serious torque, the Dodge V10 8.0L Indmar at $9,500 is the clear choice. If you're building an RC boat and need a fresh four-stroke glow engine, the OS Max FS-61 at $450 is the one. Both are listed as new, but they solve very different propulsion problems.
At a Glance
| Product | Listed Price | Best For | Bar |
|---|---|---|---|
| Dodge V10 8.0L Indmar Marine Inboard Boat Engine Motor | $9,500 | Full-size marine installations | |
| OS Max FS-61 Marine Inboard Four-Stroke RC Engine | $450 | RC marine builds |
Where Each Product Wins
- The Dodge V10 8.0L Indmar wins for full-size boat owners who want displacement, low-end torque, and a true zero-hour power plant. It's rated at 305 hp and 450 lb-ft of torque from an 8.0L iron-block V10, and it was built in the United States.
- The OS Max FS-61 wins for RC hobbyists who want a new four-stroke glow engine from Japan. It runs on nitro and glow fuel and is ready for an OS-compatible marine inboard setup.
Product Notes
Dodge V10 8.0L Indmar Marine Inboard Boat Engine Motor
If you need a full-size marine inboard with serious low-end torque, this Indmar-built V10 is as close to a blank slate as you'll find. It's listed as brand new with zero hours, never fired, and with oil still in the crankcase, and it comes from the United States. The 8.0L engine is based on the Dodge V10 truck block, an iron-block cousin of the Viper, and it's rated at 305 hp with 450 lb-ft of torque-numbers aimed squarely at pushing a boat out of the hole. The trade-off is the no-warranty listing and a few scrapes and scratches it picked up while serving as a show piece. It's a zero-hour power plant with some stored-in-box character.
OS Max FS-61 Marine Inboard Four-Stroke RC Engine
For RC boat builders, the OS Max FS-61 is a compact answer to the "new engine" question. This is the FS-61M, a four-stroke glow engine from O.S., made in Japan and listed as new in the box with the manual, stickers, and paperwork. It runs on nitro and glow fuel, and it's aimed at the 17-and-up hobbyist crowd that wants a marine inboard for a model hull. The box has some scuffing, and the listing notes all sales are final, sold as is, so there's not much margin for returns. If you're looking for a fresh, unrun four-stroke to drop into an RC marine build, this is a direct fit for OS-compatible setups.
Final Choice by Use Case
- Full-size inboard repower: Choose the Dodge V10 8.0L Indmar if you want a new, never-fired V10 with 305 hp, 450 lb-ft of torque, and U.S. origins.
- RC boat build: Choose the OS Max FS-61 if you want a new four-stroke glow engine from Japan, ready for nitro or glow fuel in a model marine hull.
