Review on 🔧 The ROP Shop Black Small Engine Spark UTV ATV Outboard Bike PWC Tachometer: Hour Meter + User Manual by Travis Filippi

Works on any engine. All you have to do is set how the engine starts in the block (each lap, other lap etc etc. This gives you 4 options covering each engine type). Directions failed at a small point ---- Not told how to turn it on! Just press both buttons until it turns on. Once turned on, it stays on until the battery runs out. Just wrap the wire around the spark plug wire (next to the cap) and you're good to go. My unit is set for RPM while engine running and total run hours with engine off. UPDATE 4/16/2015 Worked 11 hours and got stuck at 2510 rpm and shut off a few days later. piece of trash