A couple days ago I asked if anyone could tell me what gear ratio a 1996 Mercury 4 cylinder 2 stroke ELO engine was supposed to have ? EltoQuad replied according to his Mercury brochure, it showed it as having a 2:1 ratio. So we did a check using this ~ http://www.evinrudenation.com/owner-zone/by-the-numbers-gear-ratio-determination-and-speed-calculations-for-your-boat/ calculation to see if it was a 2:1 ! But it showed it to be a 1.6:1 instead ? The engine is on a 16ft Lund which weighs a little over 800 lbs. and has a 3blade 10 X13″ pitch propeller ! The problem is the boat is very sluggish getting out of the hole with a couple people in it and only turns about 4500 WOT at about 27mph
We order a 10″ pitch prop for it in hopes of getting a better hole shot and bring the rpm up to it’s recommended 5000- 5500 ! But I’m still wondering if this engine has a different ratio than was recommended ? Anyone know ?