marine engine digest logo



Comparing Small Outboard Motors



Comparing weight, cubic inch displacement, the number of cylinders and
the warranty term of small outboard motors



Notice how within the same horsepower rating some competing outboards displace more cubic inches. And notice how within the same brand name different horsepower ratings displace the same number of cubic inches. This means the same powerhead is tuned for different power output by fiddling with carburetion and maximum rpm.


Small outboard motor fuel consumption will measure roughly 10-percent of the horsepower rating in gallons per hour (at Wide-Open-Throttle). In other words, a 10-horsepower outboard will burn about one gallon per hour at WOT, while a 5-hp outboard will burn half that, or about a half-gallon per hour.

Brand HP RPM range Displ Lbs Cyl Shift Warranty
2.0 5000-6000 3.40 CID 27 1 360 degree pivot 5-Years
Mercury 2.5 4500-5500 5.20 CID 38 1 F-N 3-Years
Nissan 2.5 4500-5500 5.20 CID 41 1 F-N 3-Years
Suzuki 2.5 5250-5750 4.15 CID 30 1 360 degree pivot 3-Years
Tohatsu 2.5 4500-5500 5.20 CID 41 1 F-N 3-Years
Yamaha 2.5 5250-5750 4.40 CID 37 1 3-Years
Mercury 3.5 5000-6000 5.20 CID 38 1 F-N
Nissan 3.5 5000-6000 5.20 CID 41 1 F-N
Tohatsu 3.5 5000-6000 5.20 CID 41 1 F-N
Mercury 4.0 4500-5500 7.50 CID 57 1 F-N-R
Nissan 4.0 4500-5500 7.50 CID 57 1 F-N-R  
Suzuki 4.0 4000-5000 8.40 CID 55 1 180 degree pivot
Tohatsu 4.0 4500-5500 7.50 CID 57 1 F-N-R
Yamaha 4.0 4000-5000 8.50 CID 60 1
Honda 5.0 7.80 CID 60 1 F-N-R
Mercury 5.0 4500-5500 7.50 CID 55 1 F-N-R
Nissan 5.0 4500-5500 7.50 CID 55 1 F-N-R
Tohatsu 5.0 4500-5500 7.50 CID 55 1 F-N-R
Mercury 6.0 5000-6000 7.50 CID 55 1 F-N-R  
Nissan 6.0 5000-6000 7.50 CID 55 1 F-N-R  
Suzuki 6.0 4750-5750 8.40 CID 55 1  
Tohatsu 6.0 5000-6000 7.50 CID 55 1 F-N-R  
Yamaha 6.0 4500-5500 8.50 CID 60 1 F-N-R  
Honda 8.0 4500-5500 13.5 CID 92 2 F-N-R  
Mercury 8.0 5000-6000 12.8 CID 83 2 F-N-R  
Nissan 8.0 5000-6000 12.8 CID 81 2 F-N-R  
Suzuki 8.0 5200-6200 12.7 CID 95 2 F-N-R
Tohatsu 8.0 5000-6000 12.8 CID 81 2 F-N-R  
Yamaha 8.0 5000-6000 12.0 CID 83 2 F-N-R  
Honda 9.9 5000-6000 13.5 CID 92 2 F-N-R
Mercury 9.8 5000-6000 12.8 CID 83 2 F-N-R
Nissan 9.9 5000-6000 12.8 CID 81. 2 F-N-R
9.9 5200-6200 12.7 CID 95 2 F-N-R
Tohatsu 9.8 5000-6000 12.8 CID 81 2 F-N-R
9.9 5000-6000 12.9 CID 91 2 F-N-R  



Valid CSS!