An adjustable fuel plate device for a diesel fuel pump is disclosed. The adjustable fuel plate device can include a fuel plate to limit travel of a governor arm of a diesel fuel pump for a diesel engine. The adjustable fuel plate device can also include a translation mechanism to move the fuel plate relative to the governor arm. Additionally, the adjustable fuel plate device can include a control system coupleable to the translation mechanism to control movement of the fuel plate during operation of the engine.

An outboard motor includes an engine, a fuel pump to draw fuel into an outboard motor body from a fuel tank installed on a hull, a temporary storage tank to temporarily store the fuel drawn into the outboard motor body by the fuel pump, a fuel injector to inject the fuel stored in the temporary storage tank into the engine, a temperature sensor on the temporary storage tank to detect a temperature of the fuel stored in the temporary storage tank, and a controller configured or programmed to perform a control to limit an engine speed to no more than a predetermined upper limit rotation speed based on a detection result of the temperature sensor while the engine is running.

An engine control device includes processing circuitry configured to perform a base injection amount calculation process, a feedback process for correcting a base injection amount based on an output value of an integral element obtained using a difference of detection and target values of an air-fuel ratio as an input value, an injection valve operation process for operating a fuel injection valve based on the corrected base injection amount, a purge control process for operating an adjustment device to control a fluid flow rate from a canister to an intake passage, and a correction limiting process for limiting the output value of the integral element so that a decreasing correction rate of the base injection amount has a decreasing tendency when a charged air amount is decreased if the fluid flow rate is larger than zero.

An adjustable fuel plate device for a diesel fuel pump is disclosed. The adjustable fuel plate device can include a fuel plate to limit travel of a governor arm of a diesel fuel pump for a diesel engine. The adjustable fuel plate device can also include a translation mechanism to move the fuel plate relative to the governor arm. Additionally, the adjustable fuel plate device can include a control system coupleable to the translation mechanism to control movement of the fuel plate during operation of the engine.