Help with some problems!

Hello This is my first post, and I'm having some problems, particularly with overhangs and what looks like build up of excess material. and some wierd holes in the top layer of the roof.
I've added a few pics of some test prints.
Its a fairly generic i3 Prusa with a e3d v6 0.4mm hotend.
Tempratures were bed at 60c and end at 190c throughout.

Its my first printer and it was kit built, any questions fire away!

Boat on left was printed 0.1 layers one on right 0.3

Thank you!

what slicer your using looks to me extruding too much plastic and not enough last layers infill ie when it finishes i normally have 3 layers or 4 solid infil

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Check my rubbish blog for my prusa i3

up and running
[3dimetech.blogspot.co.uk]

Im using Slic3r with a config supplied by the chap I bought the kit off

Printing PLA? Looks like you need to add a print cooling fan to improve the overhangs.

1 Cooling Fan is needed for PLA printing.
2 Check your model.The upper looks good while bottom is bad. Sometimes, it is related with the model design.
3 Lower the nozzle temperature and have another try.

Thanks for the advice guys, will definitely fit a fan.

I've had to do a partial re-build after a clog and melt indecent so its out of commission for now

But at least its given me the excuse to re-build with some improvements!