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  1. K

    Mercruiser Diesel 4.2 300 (CMD) white smoke problems

    So, here comes an update on the problem. I did an injector test, where I loosened the injector pipe sleeve nut at the injectors, one cylinder at a time. For cylinder no 5 the RPM or the sound didn't change. Hence, the injector 5 seems to be bad. I will first call a diesel firm and see if they...
  2. K

    Mercruiser Diesel 4.2 300 (CMD) white smoke problems

    A big thanks for the replies! This weekend, I will do an injector test. I will update the thread after that.
  3. K

    Mercruiser Diesel 4.2 300 (CMD) white smoke problems

    Hello, I've some problems with my CMD D4.2L-300 D-TRONIC DIESEL. It produced a lot of white smoke when idle. The smoke disappears completely when I rev it up to 1300 RPM or higher. I have no problems reaching WOT or cruising rpm (approx. 3200 RPM). The boat quickly goes to plane. It doesn't...
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