If you cant afford to buy another motor like me....try this
yep the motor for the 4, 5 and 6hp 4stroke is the same weight, same bore stroke, same cc of 139.
based on 1hp=25cc then 139cc =5.56hp but most engines are tuned down to a lower HP for better engine life.
Ok what to do
......change the carb from 4hp to 5 or 6 hp equivalent (carb venturi/throat size is the difference between these motors) .
change the exhaust outlet size to the 5 or 6hp one
reset the idle stop adjustment, and verify/adjust full throw of the throttle cable (from idle to WOT)
and thats it.
Rick
yep the motor for the 4, 5 and 6hp 4stroke is the same weight, same bore stroke, same cc of 139.
based on 1hp=25cc then 139cc =5.56hp but most engines are tuned down to a lower HP for better engine life.
Ok what to do
......change the carb from 4hp to 5 or 6 hp equivalent (carb venturi/throat size is the difference between these motors) .
change the exhaust outlet size to the 5 or 6hp one
reset the idle stop adjustment, and verify/adjust full throw of the throttle cable (from idle to WOT)
and thats it.
Rick