Boat motors with external fuel tank

 

— tank made separately from the engine. A similar fuel tank can either be supplied with the engine or purchased separately. An external tank is more difficult to install than an internal one, because involves laying a fuel line to the engine. On the other hand, this design option does not have such severe capacity restrictions as built-in tanks — since the tank does not affect the dimensions and weight of the motor itself, it can be made quite large and roomy without sacrificing compactness and ease of control. This is especially important for powerful engines, which are heavy in themselves and consume a lot of fuel.