Search results

  1. E

    7.4L 454 High Oil Consumption

    7.4L 454 MAG BRAVO GEN V (carbureted) So I've been reading all sorts of useful threads all over the internet to find out why my motor is consuming so much oil. If I run at cruising speed (3400 RPMs) I'm going through about 2 quarts of oil per hour. When I'm just above idle for long periods...
  2. E

    Repetitive Cylinder Detonation/Pre-Ignition

    I have a Gen IV (I think) 7.4 L Mercruiser that keeps detonating cylinders. I've gone through 2 motors so far, and hesitant to replace the motor again until I figure out what's causing the pre-ignition. I'm thinking it's a fuel issue, but can't seem to isolate the problem. On the first motor...
  3. E

    7.4L Merc Gen V Mechanical Fuel/Raw Water Pump

    Anyone know if it's possible to rebuild the internals of the raw water pump on a 7.4 Merc Gen V rather than replacing the whole unit? My fuel pump has failed, and upon removing it from the raw water pump housing we noticed that the oil had run out/dried up. I'm assuming the shaft, bearings...
Top