What hp needed to power a 2.7m RIB?
Hi there, I have a 2.7m rib tender, used to access the bigger rib when its on a swinging mooring on the Dart.
The tender is a Tidalwave one, cheap but does the job, boat only weight is about 55 kgs, rated to 9.9hp with payload inc motor of about 315kgs, so 3 adults.
Its currently/temporarily powered by a 4hp 2 stroke Mariner Sailmate but that's a longshaft and has a prop for suited to heavier boat. It digs the stern in when underway and with 2 up, it can't overcome the extra drag of the leg so does not plane (4hp with 2 up may not be enough anyway to make it plane even with an s/shaft).
I am thinking of a S/shaft 6hp or a 9.9hp, but I am concerned about the weight of the 9.9 over the 6. The 8 hp's seem to weigh the same as 9.9's, so I've ruled that engine size out.
Budget not too much of an issue.
The new or s/hand engine may also double as aux on a 6m rib.
More than happy with a 2 or 4 stroke but favouring 4.