Logo
FULL SITE MENU

Search results

  1. M

    1990 Johnson 25 compression high elevation

    Ok so I found this out. I bought an aluminum boat that came w a 1982 Johnson 25. Didn’t know anything about it. I was told I couldn’t get parts for it. So I sold it for $100. I asked the guy about compression and he said it runs and has 95psi in both cylinders. So. That sucks. Shouldn’t have...
  2. M

    1990 Johnson 25 compression high elevation

    Understood. ✔️ Now, the question is: is 75 psi on a 1990 Johnson 25 2 stroke “good” “bad” or “really bad” at 5,200 feet of elevation. That’s the real question here.
  3. M

    1990 Johnson 25 compression high elevation

    Understood. Now I just need to know what “good” or “acceptable” compression is at sea level for my motor. Once I know that, I’ll know what “good” or “acceptable” compression is for that motor at 5,200 feet.
  4. M

    1990 Johnson 25 compression high elevation

    I’m at 5,200 feet. Why does throttle not being open NOT matter? Other forums and Google say it does.
  5. M

    1990 Johnson 25 compression high elevation

    Amigos, First question is what is good compression for this motor at sea level? AI/google giving me two different answers, the first being 80-90 and the other being 90-105. So, what IS the right answer? Second, at higher elevation should compression read lower? I've spoken to a racecar...
Back
Top