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Recent content by ridgeydidge

  1. R

    Exhaust manifolds and different angle on risers?

    I have a 2003 Mercruiser 4.3 MPI and I am about to replace the manifolds and risers (elbows). It appears that in 2005 the Mercury people changed the downward angle on the risers from 7 degrees to 14 degrees and I have only been able to secure the latter here in Australia. The new parts have the...
  2. R

    43 MPI surges and stops

    "Hi All, this is my first post "Hi All, this is my first posting, I am not very mechanically minded but I have a modicum of common sense. I have a 4.3 MPI Mercruiser V6 sterndrive purchased in 2004. It starts okay but surges or stops under load or when the throttle is advanced. It appears to...
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