This article presents a table of specifications for low-emission outboard engines currently (c.2005) in production and available for sale in the United States rated at 90-horsepower. There are at least eight different models from seven different brands available at 90-horsepower, and thus this makes a good point for comparison of price and other features.
The table presents engines organized by manufacturer. Prices represent the "base" MSRP price of the least expensive model, and dealer published "deal" prices gathered on-line. It is not known if the prices are exactly comparable among all models. There are additional charges for necessary accessories like propellers, gauges, and remote controls. All the two-stroke engines are in-line three-cylinder designs; the four-stroke engines are in-line four cylinder models. Displacement is given in liters. Weight is the "comparable" dry weight in pounds.
| LOW EMISSION OUTBOARD MOTORS 90 HP c.2005 | ||||||||
|---|---|---|---|---|---|---|---|---|
| BRAND | MODEL | MSRP | DEAL | LBS | LITER | TECHNOLOGY | HP/L | LB/HP |
| Evinrude | E-TEC 90 | $9,174 | $6,499 | 320 | 1.3 | 2-stroke DFI | 69.5 | 3.55 |
| Honda | BF90 | $9,585 | $6,004 | 373 | 1.6 | 4-stroke Carburetor | 56.2 | 4.14 |
| Mercury | OptiMax 90 | $7,777 | $6,499 | 375 | 1.5 | 2-stroke DFI | 60.0 | 4.17 |
| Mercury | 90 EFI 4-stroke (Yamaha) | $8,228 | $5,999 | 386 | 1.6 | 4-stroke EFI | 56.2 | 4.29 |
| Mercury | 90 EFI "FourStroke" (Veradito) | 399 | 1.7 | 4-stroke EFI | 52.0 | 4.43 | ||
| Nissan | 90 TLDI | $8,379 | (Help) | 315 | 1.3 | 2-stroke DFI | 69.2 | 3.50 |
| Suzuki | DF90 | $9,648 | $6,500 | 416 | 2.0 | 4-stroke EFI | 45.0 | 4.62 |
| Tohatsu | 90 TLDI | $8,260 | $7,170 | 315 | 1.3 | 2-stroke DFI | 69.2 | 3.5 |
| Yamaha | F90 | $8,850 | $7,299 | 369 | 1.6 | 4-stroke EFI | 56.2 | 4.10 |
There is over a 100-pound variation in weight among these engines, from 315-pounds to 416-pounds. The largest engine, 2.0-liters, has 50-percent more displacment than the smallest, 1.3-liters. The horsepower per liter varies from a modest 45 HP/L to as much as 69 HP/L, again quite a range.
The Mercury four-stroke 90 uses a power head made by Yamaha. The MSRP pricing is from published data (See TRAILER BOATS, January 2005, for more information). The DEAL pricing is from various published prices on websites as collected in November, 2005. Follow the hyperlink for more details.
There are more 90-HP low emission outboard engines available than the models shown in the table. In most cases there are additional models in different shaft lengths for each of the engines shown. There are also some variants of these particular models which are specially rated for saltwater use.
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Author: James W. Hebert
This article first appeared November 19, 2005.