Originally Posted by kestrel452
3. Can one tell if their tubes are underinflated or overinflated by the "feel" of the tubes?
Hi..I have a Quicksilver 4.3m inflatable SIB..and have never put a pressure gauge near it.
I just top it up with the hand pump..until it passes the "thump test" In other words..I give it a thump with clenched fist..and it bounces off when righ pressure is achieved. Nothing so scientific as PSI or millibars. Its 10 years old now and the previos owner just did a thump test on it...so no harm has ever resulted in it.
It is a wooden floor though..not a new fangled air floor that needs pressure tested.
It planes no problem at all. It has an inflatable keel under the wooden floor..which I deflate if Im hauling up a shore for a while. If I forget to inflate it again..it still planes easy..but causes a bit of a bow wave.
Perhaps that answers some of your question.. unless its an air floor SIB.. IMO..its not critical
Engine is 25HP for this SIB