2004 F150 Questions @ start up & RPMs

Recently bought a 2005 Wellcraft 22 footer with a 2004 F150TXRD outboard. My questions are:

1. To start up engine must crank starter for 4-5 sec. Is this normal or should it start right away? What could be causing this delay?

2. The RPMs gage is not functioning properly. It does work but the needle moves below the 2000 mark and I know I'm at full throttle so I would expect
much higher RPMs readings. Checked the connectors behind gage and they all look in good order. Is there a voltage check I can take in order to isolate the problem?

3. To Plane the boat is taking 8-10 sec. The prop is a 3 blade and is got a
19-M engraved on it. Not too sure if is the right size for this 4000 lbs boat.

I'd appracieate all comments @ my questions

You may have low cranking voltage. How good is your battery and connections? Also you are definitely over propped. Get your self a good Yamaha digital tach and harness so you can see what you are turning. Should be 6000 rpm wot. Very important. I repeat, very important. Yamaha Reliance 15p might be about right. Or the aluminum 16p. [email protected]