Our fueling tanker, MV Reiss Marine, was powered by a pair of 12-V 149 Detroits. It also had two 6-71 Detroits for electric power and pumping. It would transfer 1,000 gallons of hot oil a minute. The tanker would put on fuel while the ore carrier was loading and a complete fill was about 65 or 70 minutes.
Wife and I have two boats here in Missouri. We have a Princecraft aluminum fishing boat with a Canadian top enclosure so we can go out on chilly days. It has a 115 4 stroke Merc OB.
We also have a Playcraft three log pontoon with a 225 Honda OB. The pontoon will do 55 mph and the three long set up handles big rollers and swells put up by bigger boats.
Love pontoon boats. Have seen some like yours at Lake Havasu.
We also have two boats...our other is a fully restored 1962 Century Resorter 16’....has been garage kept its’ whole life and is a great ski boat....