Two-stroke versus four-stroke engine comparison

Rotax 503 DCDE two stroke

$5147 with electric start (uflyit)

HKS 700E four stroke

$5785 Tom Olenik

50 hp 60 hp
3.25 gal/hour @ 5200-5400 rpm for 65 mph giving 20 mpg (per Brian)
or
4.5 gal/hour @ 5600-5800 (per Dave) at (guessing) 75 mph giving 16 mpg
2.38 gal/hour @ 4750 rpm* giving, at a guess, 31 mpg @ 75 mph
160 miles range on 8 gal taking 2.46 hours for Brian
or
133 miles range on 8 gal taking 1.7 hours for Dave
252 miles range on 8 gal taking 3.36 hours
250 mile trip would take 4.8 hours for Brian and 4.3 hours for Dave including a 1-hour fuel stop.  Cost for Brian is $25 and for Dave is $30. 250 mile trip would take 3.36 hours costing 8 gal * $2 = $16
98 lb. per Dale 121 lb.  Engine weight of dry engine with all electrical equipment, electric starter, carburetors and gearbox*

* Tom Olenik http://www.buyitsellitfixit.com/