Water Pump

My motor is a 2006 115 4 stroke with 50 hours. my servce guy is suggesting that i replace the water pump for $340 ($95 for the pump and 2.5 hrs labor @$98.50/hr). does that sound right? replace the pump with only 50 hours on the motor? and cost?

any comments would be most appreciated....i'm a newbie to this forum and its my first boat....i've just been working out of the country and just haven't used it like i planned to.

thanks!