1/2/2024 0 Comments Mercury inboard enginesHowever, it burns significantly less fuel, compared to the Optimax, and will offset the extra cost in just 2924 miles at 34.7 mph. The 1.7 MS120 diesel is quieter, slower in acceleration, and costs $1385 more than the Optimax and $5101 more than the sterndrive. The outboard's only advantages are slightly quicker acceleration and a higher top speed. At 34.7 mph, it also saves 20 cents per mile in fuel and oil. At 34.7 mph, it still costs just 34 cents per mile.Ī 135-hp 3.0L sterndrive costs $3716 less than a 135-hp Optimax outboard. At 20 mph, the Cummins/MerCruiser diesel costs about 33 cents per mile to run. In our neighborhood, diesel fuel is now $1.99, 20 cents more than 87 octane unleaded. Even running at WOT, the diesel consumes only 5.8 gph at 34.7 mph (5.98 mpg). In this Trophy Walkaround, that's a cruising range of 515 miles at 20 mph. At a 20-mph cruising speed, the diesel sips just 3.3 gph (6.06 mpg). The diesel is significantly quieter than the 3.0L sterndrive at every speed, and is even quieter than the Optimax outboard. Surprisingly, the diesel makes it to the same top speed as the 3.0L sterndrive. The diesel is slower in acceleration than the gas sterndrive and outboard in every speed range. Equipped with the same Alpha 1 lower unit as the MerCruiser 3.0L gas sterndrive, the engine/drive package costs $12,000. We tried a 1.7-liter turbocharged inline Four rated at 120 hp and 195 ft.-lb. We get a total cost for fuel and oil of about 71 cents per mile at 20 mph and 82 cents per mile at 34.7 mph.Ĭummins and MerCruiser have a new joint venture building small diesels for pleasure boats. This calculates to about 12 cents per mile. In our neighborhood, Mercury Marine's Quicksilver 2-Cycle Outboard Oil sells for $15.99 per gallon. Even something as clean-running as this Optimax 135 still goes through roughly 1.7 gal. A 2-cycle engine lubricates its bearings by oil injection. At 34.7 mph, the outboard fuel costs around 69 cents per mile.īut wait. We calculate a cruising range of 261 miles for the Trophy 2002 and a fuel cost of roughly 58 cents per mile at 20 mph. Throttle back to a 20-mph cruise, however, and the outboard delivers a comparable 6.5 gph. At the 34.7-mph top speed of the sterndrive, the outboard burns 13.4 gph. That's nearly 8 mph faster than the sterndrive. The 2002 Walkaround is 2.4 seconds quicker to 30 mph and tops out at 42.5 mph. Between 20 and 25 mph, however, the lines on the graph cross and the outboard handily outruns the sterndrive. The gas sterndrive out-accelerates the Optimax outboard at speeds up to 20 mph. The outboard and sterndrive may both be rated at 135 hp, but the performance is markedly different. Bottom line, the dry weight for the 2002 Walkaround outboard is virtually identical to that of the 2052 Walkaround sterndrive. oil tank, different rigging and a reinforced transom. However, the 2-stroke outboard requires a separate 3-gal. The basic outboard weighs 431 pounds, a significant 200 pounds less than the 3.0L sterndrive. A 2-cycle V6 of 2.5 liters, it's fed by Mercury's 2-stage direct fuel injection and runs on 87 octane gasoline. Mercury's 135-hp Optimax has the same power rating as the 3.0L sterndrive.
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