For example , a plastic bag sucked onto the jetunit 's intake grill can have quite an adverse effect .
The fuel efficiency and performance of a jetboat can be affected by anything that disrupts the smooth flow of water through the jet unit .
A plastic bag sucked onto the jetunit 's intake grill can have quite an adverse effect .
The fuel efficiency and performance of a jetboat can be affected by anything that disrupts the smooth flow of water through the jet unit .