Assuming a power factor of approx. 0.8 which depends on motor but this will error on the side of caution IL =S/1.73*VL S=P/pf 20hp= about 15000 W. S=15000/.8 = 18750 VA.
IL = 18750/1.73*415 = 26A
The motor would draw about 26 A. depending on Load and efficiency
The winding design of the motor will not economically allow this to work. You would have to drive a 3 phase generator to supply it.
20 Hp moter control panal digaram.
Typically single phase motors go up to 10hp. Wouldn't be very efficient at about 100 amps. A 20hp 3 phase motor at 230v pulls 52 amps. The 10hp single phase 230v pulls 50 amps.
1968 20hp
9989819
thats the same engine and same weight.
mix 50:1
your motor is a 1975 200 20hp you can get more info here: http://www.autorepairmanuals.biz/site/573683/page/599300
50mph
try iboats.com
A motor can be reckoned at 1.6 kVA per horse-power, so on a 415 v 3-phase suppy the current for 20 HP would be 45 amps. For continuous use the wire size should be 25 mm2
Is there a shear on a 1975 mercury 200 (20hp) outboard motor