Hello, <br />I just bought a 1991 Imperial with either a 91 or 92 Volvo Penta AQ171/SP engine. It is a 251 DOHC 4-cylinder, 16-valve, 4-stroke with 167HP crankshaft and 150HP propeller shaft power.<br />We just had the boat tuned up, and it seems to get up to speed very well.<br />However, when...
