If you hit a rock with the prop it may destroy the lower unit.----May cause the wee timing chain ( underneath the block ) to skip timing sprockets.----Damage the valves and cause damage beyond the value of the motor.
New water pump impeller every 5 years.----And do not slam it into anything ( rocks ) that causes a dynamic halt.---Often results in scrapping the motor.
This motor is SUZUKI built !!----And not all of their 4 strokes were rebranded.----The early 9.9 / 15 HP 4 strokes were their own with same lower units as their wonderful 2 strokes.
They will idle all day long and the next day !!-----This concept of plugs fouling is not well understood in my opinion.-----I trolled with a 235 HP V-6 crossflow for hrs at a time.
