Re: Prop pitch question Home › Forum › Ask A Member › Prop pitch question › Re: Prop pitch question dave-bernardUS Member - 1 Year (includes $3 online payment fee)Replies: 2014Topics: 30 March 27, 2018 at 2:39 pm #73110 I may have a merc-o-tronic shop tach for testing it hooks around the spark plug wire. works on any motor that has plug wires.