Avon Adventure 5.6m Rib Boat

Avon Adventure 5.6m Rigid Inflatable Boat. Hull is in good condition, sponsons hold air. Has 7 seats, 4 forward facing and 3 aft facing. Seat have been partly reapholstered. Storage under the seats.
2 batteries with interlinking isolators. Hydraulic steering.Garmin Navigation, depth fish finder.AIS transponder.Standard horizon 25w vhf radio with DSC.LED navigation lightsUSB power.Compass.Sony Stereo.Sump Pump.Stainless steel A Frame with vhf antennas, radar reflector, nav lights and gps receivers mounted. Dash has been rewired and is very tidy inside. Has a forward anchor locker with anchor, chain and rope. Trailer is an admiral.
It is laddered, braked and roller bunked. Rated for 1600kg. Trailer is relatively new. THE BAD BIT.The engine. The engine has an issue.
I have not had it looked at my an engineer so it may be simple or it may have totally had it. The engine does run but is running lumpy and is down on power. The power trim is also very leaky. The engine is a 2002 Mariner 115hp Fourstroke EFI. Has power trim(but it leaks).Aluminium prop.Has had regular oil changes since i have had it.
Had had the impeller changed regularly and pumps water very well.Has been flushed out with fresh water after every use. Hopefully all is not lost with the engine but do expect that it will need to be replaced if buying the boat. Please do contact me via classifieds board, phone or text with any questions or if you would like more detailed photos.