RedactedNarrative: Vessel 1 cruising northbound towards Hudson on the Wisconsin side of the river.  Operator noticed a substantial amount of smoke and heat coming from the engine compartment.  Vessel 1 Operator stopped the vessel and turned off the engine.  Vessel 1 Operator verified all passengers were wearing PFDS and moved them to the front the vessel, away from the source of the smoke and upwind.  Vessel 1 Operator located the fire extinguisher.  Vessel 1 Operator connected the trolling motor and had his oldest son transport them to the nearest visible dock.