It really depends on how big your boat is and how fast you want to go typically you want to go 20-25 while tubing so get a big enough motor to push your boat with a tube 20-25 mph
20% of 190= 20% * 190= 0.2 * 190= 38
My 15 ft. aluminum v-hull does 22 mph with a light load in it. More weight = less speed.
20 x 190 = 3800 20% x 190 = 38
This all depends on the boat in which it goes. A 25 HP outboard motor, on a 14' aluminum runabout can cruise at 20-25 mph. Now, if you were to install hydrofoils (do a Google search) to the bow and transom area of the same boat, you could go upwards of 45 MPH +. Although not very common today, hydrofoils are currently used on Italian, and American navy battleships...crazy fast
30cc is equilent to 20 mph
20% of 190 gallons of water= 20% * 190= 0.2 * 190= 38 gallons of water
If you mean 20% of 190:20/100 * 190 = 38If you actually meant 20% off 19080/100 * 190 = 152
9.5
Speed is dependant on a number of factors. Most importantly the size, type and weight of the boat that it is on and the number of people on board. A 50 HP outboard will push a small aluminum fishing boat a lot fast than it will a 20 ft fiberglass boat. I have a 50 HP 2 stroke that will push a 16 foot aluminum boat 35 MPH.
the 20hp Mercury outboard motor runs at the most at 8mph on a good 14ft to 16ft aluminum boat. Mercury.co
20 + 190 = 210