It really doesn't need to be that firm. If you aren't experiencing any issues with the motor starving for fuel or cutting out, it is fine.
Capt. Craig Copeland
2013 Nautic Star 2110 Shallow Bay Boat
Nautic Star Boats Pro Staff (nauticstarboats.com)
Redneck Fish'n Jigs Pro Staff (redneckfishn.com)