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  1. J

    2003 Merc 5.0 MPI no start, intermittent spark

    Water pressure sensor on the steering cooler went bad. The loose ground caused my intermittent spark. Once tightened, the code 133 showed.
  2. J

    2003 Merc 5.0 MPI no start, intermittent spark

    Just an update, I had a loose ground on the back port side of the motor. Took off the leads, cleaned them and retightened. Motor started and ran for an hour. Storm blew in, decided to take out the next day, Motor started and ran. As I left dock, motor died. Won’t restart. Got my buddys...
  3. J

    2003 Merc 5.0 MPI no start, intermittent spark

    No kill switch, it’s a Searay Sundancer 300, but will check for 12V at the coil!
  4. J

    2003 Merc 5.0 MPI no start, intermittent spark

    I’m at a loss. Unrelated, port motor just got new fuel injectors and a tmap sensor. Took boat out and ran mint. Next week, go to take it out, Stbd dies 1000’ away from dock. Won’t restart. Open cap and rotor. Very slight corrosion. Ok Replace. No start. Checked the 3 fuses and the...
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