I am nearing completion on my repower job(01 225 FICHT).....I just replaced my old tach to the new "smart tach" all omc....part # 177107....this is the model that has the no oil, hot, chk engine, and low oil sensors on the gauge.

My problem is that when I turn the motor off, the tach stays at 500 rpms it does not go back to zero...I also noticed a black arrow on the back of the gauge that is pointing to position six......where should this be set?????and what does 5, 6, and PUL/REV stand for?

I always appreciate the help from everyone.....
Paul