Calculate horsepower loss:

Verado VS EFI or Carbureted Outboard Engine:

Elevation Example City Air PSI 300 HP Naturally
Aspirated Engine		 300 HP
Verado Engine
8000' Durango, CO 11.8 235 HP
22% Loss in HP		 294
2% Loss in HP
7732' Cody, WY 12.0 235 HP
22% Loss in HP		 294
2% Loss in HP
7100' Flagstaff, AZ 16.0 235 HP
22% Loss in HP		 294
2% Loss in HP
7000' Fresno, CA 18.0 235 HP
22% Loss in HP		 294
2% Loss in HP
6900' Espanola, NM 19.0 235 HP
22% Loss in HP		 294
2% Loss in HP
6752' San Bernadino, CA 20.0 235 HP
22% Loss in HP		 294
2% Loss in HP
6225' Carson City, NV 22.0 235 HP
22% Loss in HP		 294
2% Loss in HP
6205' Elko, NV 22.0 235 HP
22% Loss in HP		 294
2% Loss in HP
5980' Chinle, AZ 22.0 235 HP
22% Loss in HP		 294
2% Loss in HP
5512' Denver, CO 22.0 235 HP
22% Loss in HP		 294
2% Loss in HP
5335' Rio Rancho, NM 22.0 235 HP
22% Loss in HP		 294
2% Loss in HP
5266' Casper, WY 22.0 235 HP
22% Loss in HP		 294
2% Loss in HP
5029' Reno, NV 22.0 235 HP
22% Loss in HP		 294
2% Loss in HP
4960' Fort Collins, CO 22.0 235 HP
22% Loss in HP		 294
2% Loss in HP
4872' Pueblo, CO 22.0 235 HP
22% Loss in HP		 294
2% Loss in HP
4414' Truth or Consequences, NM 22.0 235 HP
22% Loss in HP		 294
2% Loss in HP
4200' Salt Lake , UT 22.0 235 HP
22% Loss in HP		 294
2% Loss in HP
4200' Las Vegas, NV 22.0 235 HP
22% Loss in HP		 294
2% Loss in HP
4150' Fallon, NV 22.0 235 HP
22% Loss in HP		 294
2% Loss in HP
4140' Klamath Falls, OR 22.0 235 HP
22% Loss in HP		 294
2% Loss in HP
4120' Scottsbluff, NE 22.0 235 HP
22% Loss in HP		 294
2% Loss in HP
3200' Rapid City, SD 22.0 235 HP
22% Loss in HP		 294
2% Loss in HP
3005' North Platte, NE 22.0 235 HP
22% Loss in HP		 294
2% Loss in HP

The Cost of Power Loss

As the chart above clearly shows, horsepower loss with Naturally Aspirated engines is significant. And the higher you go, the worse it gets - up to a 22% drop in power! Why pay the price of a 300hp EFI or carbureted outboard when you are only getting 235hp?

Often, boaters will buy an additional, lower-pitch prop to restore engine speed to its recommended range. But the most effective way to regain the lost power is to install a supercharger or turbocharger. While possible, this isn't practical, cost-effective, or reliable for engines not originally designed to be supercharged.

The Verado Advantage

By comparison to competitive Naturally Aspirated engines, the supercharged Verado sacrifices only one to two percent power initially at about 1,000 feet - but then stabilizes as altitude increases. That's because it has built-in features that help reduce horsepower loss in higher elevations:

  • The supercharger pumps 50 percent more air into the engine, for more torque and power.
  • The Verado intercooler decreases air intake temperature for additional power.
  • The Electronic Boost PSI control electronically monitors and controls the boost pressure to maintain consistent performance - regardless of elevation, heat, or humidity.
  • Verado's self-compensating supercharger eliminates the need to change to a lower-pitch prop or modify engine or hardware to improve the fuel: air ratio.

Additionally, there's no need to try and find the right (and costly) combination of propeller and gear ratios for boating at different elevation levels. With Verado, boating at 2,500, 4,000 and 5,000 feet are the same - with no significant loss in horsepower!

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