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  1. K

    7.4L Impeller replacement attempt

    Impeller housing is new. Thermostat is new. Would a chemical flush like barnacle buster make a difference? I’ve flushed all heat exchangers with water, looking for impeller peices and they appear OK. I have a closed system.
  2. K

    7.4L Impeller replacement attempt

    I seem to have more water coming from the Starboard engine than the port and the pet engine is running slightly over 180 degrees. Starboard runs just over 140. Risers are inspected and in good shape. Question: could this be caused by impeller installation with fins in wrong direction?
  3. K

    7.4L Impeller replacement attempt

    No, just a single helm.
  4. K

    7.4L Impeller replacement attempt

    My Impellers are working however, my port side temperature gauge is not working. It is a new Gauge. I replace the sensor on thermostat housing and temp gauge never went above 100. I replace the thermostat because it seemed like it was stuck open. I still have a slight amount of steam from the...
  5. K

    7.4L Impeller replacement attempt

    Fuel pump is not attached yet. I only meant, is the lack of oil enough to keep it from turning. The washer is on the shaft where the cam is. Not under a nut. I can try a pic tomorrow, but, I can turn my current assemblies, even the one that is worn out, but the new Amazon one seems locked up.
  6. K

    7.4L Impeller replacement attempt

    I just received the Amazon pump and it looks nice. However, I am unable to turn the pulley. There is no Oil and the impeller assembly is already bolted on. Also, there is a loose washer on the water pump side of the shaft. Is this normal?
  7. K

    7.4L Impeller replacement attempt

    Where might I find these engines serial numbers? They’re not on the breather covers.
  8. K

    7.4L Impeller replacement attempt

    Thanks for the great advice! I pulled these assemblies and installed the new impeller kits. One of my housings was nearly empty of oil, the bearings feel rough and the fuel pump arm is worn. Also, it appears the shaft is bent as the pulley wobbles... Should I pay the premium for the...
  9. K

    7.4L Impeller replacement attempt

    Great video. I wish my engine was on a stand like that! I am probably going to remove the raw water / fuel pump assembly from the motors for this replacement. I’ve ran out of options and patience to do it while attached to the engines.
  10. K

    7.4L Impeller replacement attempt

    I meant that the impeller body slid easily on the the shaft. I agree with you on needing strength for this.
  11. K

    7.4L Impeller replacement attempt

    I almost remove the whole assembly but, was concerned about fuel spillage from the lines. Just close the valves and catch what runs out of the lines? What service should I perform on fuel pumps? Apologies, I don’t have a service manual for these Engines, yet. Source for service manuals? Thanks!
  12. K

    7.4L Impeller replacement attempt

    I purchased a neglected 92 Wellcraft with twin 7.4K Inboards and closed cooling system. Port engine overheated, so, I bought impeller kits and started the replacement project. The raw water pump is part of the fuel pump assembly. The port engine’s assembly slid right on, then I spent 3 hours...
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