Thanks! It's a standard 3-3/8" tach. My previous tach was also 3-3/8" so it was a drop in replacement for me. I really wanted a 3k tach w/hour meter, but I couldn't find any reasonably priced that were pulse driven which also had an hour meter . Most low rev engines are diesels so it was more common to find alternator signal (W) driven tach. It was very easy to install and connect. One positive wire to the ignition (I spliced onto a wire just behind my key switch). One negative wire to the ground. One signal wire to the negative terminal of the ignition coil. It also has an internal dash light which I connected to my light switch. Assuming you have everything set up (wires, solder iron, splicing connections, dash access, etc) I think this is ~1hr total job....but then again it took me a month to get it right! 
It comes with the tach, mounting bracket, and instructions. It' pretty much a DATCON TACHOMETER 0-4K HOUR METER 16 PULSE. I found one on EBAY with a chrome ring. I purchased mine from another seller, but these things seem to be all over ebay. Good luck!!
Datcon Tachometer 0 4K Hour Meter 16 Pulse P N 100245 12 24 Volt | eBay
It comes with the tach, mounting bracket, and instructions. It' pretty much a DATCON TACHOMETER 0-4K HOUR METER 16 PULSE. I found one on EBAY with a chrome ring. I purchased mine from another seller, but these things seem to be all over ebay. Good luck!!
Datcon Tachometer 0 4K Hour Meter 16 Pulse P N 100245 12 24 Volt | eBay
