What would cause a 1998 mercruiser to bog down?

A 1998 MerCruiser may bog down due to several reasons, including fuel delivery issues like a clogged fuel filter or failing fuel pump, which can restrict fuel flow to the engine. Ignition problems, such as worn spark plugs or a malfunctioning ignition coil, can also lead to poor engine performance. Additionally, a dirty or malfunctioning carburetor or fuel injectors can affect air-fuel mixture, causing the engine to struggle under load. Finally, issues with the exhaust system, such as blockages, can impact engine efficiency and performance.