In rare set-ups can you tow with it down which is the best way for weight distribution to some degree and much more stable.
Towing pontoon motor up or down. Ensure the outboard is in forward gear before trailering. This size motor will give you plenty of speed for towing tubes as well as pulling most skiers and wakeboarders too. But he clearance issue good point about backing makes it risky.
We dont always have that option but realize that wind can push a towed vessel off course so you have to maneuver the towing vessel accordingly. This prevents the prop from spinning freely during transportation. Because pontoon boats are not fast people often overcompensate with large motors or even more than one motor.
The 70hp four stroke Evinrude manual like the Mercury manual referenced above says clearly not to tow the boat in with the motor in the fully up position. Despite their large size and perceived sluggishness you can ski behind a pontoon boat. You will also want to make sure that you take down the top of the pontoon in high winds.
You need to check with your states speed and weight limits for trailers first. Check your tires all of them. 3 Pontoons sit high.
Yes you can ski behind most pontoon boats but your engine must be 70 horsepower at a minimum. You should also never allow someone to tow you if your top is up. While having your Bimini top up is essential in 95 of the cases aka hot sunny days out on the water there are a couple of situations when it might be better to keep it collapsed.
This low tie-off point constantly pulls the rope and you downward. Time For A Physical. Always up in my opinion.