To do so you will want to measure at the exact center of the transom from the very top to the very bottom.

Outboard motor shaft length for pontoon boat. In calm water you can expect to ride at about 5 mph. For mid-range engines the most common shaft length is 20 508 mm. Rite this minute it has a Yami 50Hp outboard on it with a 20 shaft.

Outboards sold for sailboat propulsion often have an. Long shafts are 20 to 24 inches long. Extra long shafts are 25 to 29 inches long.

Keep in mind there is about 2 of adjustment in the motor mounting holes. Extra-extra long shaft30 inches. Short shaft15 inches.

Extra-extra long shafts are 30-inches long. Depending on the manufacturer size names might change. Long shaft vs 20 inch shaft motor on Pontoon.

The Outboard Industry Association OIA has recommended this formula. Pontoon boats with smaller engines are expected to go with shorter shafts. Most pontoon boats do require a long shaft motor and the longer your boat is the larger of a motor you will need.

Ive had my 24 2 log pontoon for a few years now and just got a new to me 70hp Johnson i believe its a 20 shaft but see attached picture and correct me if. Or even better move some weight to the rear batteries gas tanks ect. I have sold the motor and will be replacing it with a 150hp.