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 Im wrong.

Pontoon motor shaft length. 1 2013 22 SLX. Generally speaking the average shaft length for a trolling motor is around 60 or 152cm if you intend on mounting the motor on the bow of your boat. If you have a 16-foot-long pontoon boat you can use a 25-horsepower engine to cruise around but if your pontoon boat is 22 feet long youll need an engine that has at least 150 horsepower in order to get any decent speed.

Shaft length on transom mount motors is less critical than on bow mount motors but is still important to double-check. Depending on the manufacturer size names might change. Minn kota has a grouping of two motors that they specifically call pontoon modelsBoth motors only have the 48 shaft 54 and 68.

If you really want to play it safe you can choose a 48 shaft for your trolling motor. The shaft length is truly a decisive aspect of fishermens ship. I have emailed Mercury with the serial number asking them to verify.

Extra-extra long shaft30 inches. If youre stuck deciding between a shorter and longer shaft version its usually safer to go a little longer. There are also specialty motor shaft lengths.

Typically the standard shaft length on the market is 42 inches. Most pontoon boats do require a long shaft motor and the longer your boat is the larger of a motor you will need. By industry standards the perfect length of the shaft should not be more than 42 inches.

It has a horizontal bracket which allows this trolling motor to be mounted on the bow of your pontoon. The shaft is adequately long at 55 inches and the head tilts so that you can easily stow your motor. Shaft Length for Pontoon Boats.