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  1. J

    Motor locked up when lower unit is installed

    Motor is a 78 Evinrude 115. Lower unit was cracked so I sourced another one. Motor cranks and runs fine with the lower unit removed, but once I install my new "used" lower unit the motor is locked and will not spin. I already made sure that the unit is not in gear, as I can spin the prop shaft...
  2. J

    70hp Tilt Assembly Identification

    By looking at these pictures, can someone tell me what years this tilt assembly will work on? The guy I got it from says it will work on my 77, but I cant really find any pictures online to confirm this. Thanks!!
  3. J

    Octane Rating and Timing Advance

    Hello, I have a 1977 Johnson 70hp OB. Currently I am running 93 octane, and have the WOT timing advance set to 14 degrees. Factory WOT timing in 77 was 17 degrees, but have been informed on the forum that its recommended to lower maximum advance to 14 degrees. First question is, am I wasting...
  4. J

    17'6" VIP Prop Selection

    Recently bought a 89 VIP 179 f/s boat. I believe the weight to be around 1100lbs. It came factory with a 125 Force, but has been changed to a 77 70hp Johnson. It is a bit underpowered I am sure. With my current prop which is a aluminum 15 pitch, 4 average people in the boat, and running WOT. I...
  5. J

    1977 70hp Johnson wont idle, wont rev

    Hello guys, ​I bought a 1989 vip fish/ski boat about 2 months ago that came with a 1977 Johnson 70hp outboard. When I first fired the engine it seems to run decent on muffs, but once going to the lake it would fall on its face, and not rev or have any power with throttle. Well after the first...
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