To know the exact length of your boat youll first need to measure the distance between the transform to water or where the shaft is mounted.
Pontoon motor size. You will find a wide variety of horsepower options ranging from 99-600. It will have all you need for power and speedJust keep in mind a 75 will use about 75 gph gallons per hour at wot a 60 about 6 gph. If youre ready to pull the trigger on that new pontoon boat you must figure out what size engine youre going to put on it but how do you know which one to choose.
For 24-foot pontoon boats I dont recommend going below 150HP. From my own personal experience with pontoon boats I find that the older pontoons would typically have 25-50 hp engines and occasionally a 75hp on them. Therefore while short shafts can be somewhere around a length of 15 inches long ones can be around 20 inches while extra-extra long shafts can be approximately 30 inches in length.
In retrospect I find that the newer 28 ft pontoon boats seem to be coming with 90-115-150 hp engines on the back. The bigger the boat and the greater speed you require the larger the motor size. Top speed is low forties while cruising between 25 to 30 is a comfortable ride even in choppy water.
I have a Premier 225 Legend RE Triple Toon Ski Package with with a 150 E-TEC. By industry standards shaft lengths predominantly range between 15-30 inches. Mercury has several outboard motor models to choose from when customizing your Bennington pontoon boat including the Pro XS 175-300hp Fourstroke 30-60hp and Fourstroke 75-150hp.
The right set-up can help you take full advantage of your pontoon boat on lakes and rivers. However the 24-foot pontoon boat can still be amped up with a 150-175 horsepower motor. Typically the standard shaft length on the market is 42 inches.
Although the size of the motor matters there are other factors that determine your pontoon speed. Watch this video if you are wonde. The advantage of the bigger motor is it will be loafing when operated at the 60 top speed while using.