Description
2018 Mercury 400R 30inch outboard motor
The 400R 30-Inch Outboard is engineered for boaters who require elite offshore performance, heavy-duty reliability, and confidence in extreme Alaska conditions. As part of the Mercury Racing lineup, this outboard delivers exceptional acceleration, massive torque, and precise throttle control, making it ideal for large recreational vessels and professional commercial operations. Powered by a supercharged four-stroke V8 engine, the Mercury 400R provides dependable cold-weather starting and consistent power delivery in rough seas and freezing temperatures. The 30-inch ultra-long shaft is perfectly suited for offshore hulls, heavy boats, and high-freeboard vessels commonly used in Alaska’s coastal and open-water environments.
Specifications
| Specification |
Details |
| Horsepower |
400 HP |
| Fuel Type |
Gasoline |
| Engine Type |
Supercharged 4-Stroke V8 (Mercury Racing) |
| Engine Displacement |
4.6 L (4,600 cc) |
| Cylinders |
V8 |
| Stroke Type |
4-Stroke |
| Stroke |
86.0 mm |
| Start Kit |
Electric Start |
| Shaft Length |
30″ (Ultra-Long) |
Why Alaska Buyers Choose the Mercury 400R
-
Extreme Offshore Performance – Built for high-speed and heavy-load applications
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Cold-Weather Reliability – Designed for consistent starts in freezing conditions
-
30-Inch Shaft Stability – Ideal for offshore, deep-V, and high-freeboard boats
-
Saltwater-Ready Construction – Advanced corrosion resistance for coastal use
-
Commercial-Grade Durability – Trusted for demanding professional operations
Ideal Applications
-
Offshore commercial vessels
-
High-performance recreational boats
-
Long-range transport and support craft
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Alaska saltwater and cold-water operations
Jaramillo Sylvia –
I ordered this 2018 Mercury 400R 30-inch outboard motor from Speeds Motors and was happy to find the exact setup I had been looking for. I specifically wanted the 400R with the 30-inch shaft, and the listing had the details I needed before placing my order. The process was straightforward, and overall I’m very pleased with the purchase. Speeds Motors was a good place to find this particular Mercury outboard.
Suzanne Witriol –
I bought the 2018 Mercury 400R 30-inch outboard motor from Speeds Motors after comparing a few different options. I wanted the 400R specifically, and the 30-inch shaft was important for my boat setup. The product information was helpful and the ordering process was fairly easy. There were a couple of minor things that could have made the experience better, but overall I’m satisfied with the purchase and would consider Speeds Motors again.