I have a 2003 Nissan NSF 9.9B2 four stroke, i put the 15 hp carb on runs great but wanna make sure i am running right prop which i changed to a 10 pitch, the tachometer that use to be listed under the 9.9, 15, and 18 models is no longer avalible, is there another tach that will plug in the wiring harness like that one did? or any suggestions on another that i can retrofit and make work?