I have this question in my motor thread, but thought I might get some new looks with a fresh post. I recently bought a 1966 Johnson 20 HP motor, which is a nice upgrade from my 8 HP. My boat is a 1440 MV and with about 180 lbs of mods, two people, gear & full livewell it hit 21.6 MPH wide open on the GPS. That was max, usually clocked about 20.7. That seems pretty good for a '66. The boat got up on plane at or near 13 MPH. Went through about 3 gallons, the GPS logged 12.3 miles, some of those were drifting and trolling through the cypress stumps though. So, the mileage may not be all that bad. I'm just used to dinking around on a 170 acre lake with a 5 mph speed limit, when I hit a bigger lake and opened it up a bit she drank a little more fuel than I'm used to. I also added a can of Sea-Foam to the tank.
The good news is the motor seems to run great and starts right up. Every once in awhile it seems to have a small hiccup at idle, almost sounds like a miss. Not sure if I need to do anything for this or not. Just wanted to see if the speed sounds about right to everyone.
The good news is the motor seems to run great and starts right up. Every once in awhile it seems to have a small hiccup at idle, almost sounds like a miss. Not sure if I need to do anything for this or not. Just wanted to see if the speed sounds about right to everyone.