Originally Posted by Mark rsa2au
I pulled the correct temp sensor out (with the 2 wires) and tested resistance at 10deg C intervals up to 90degC and it was fine. A few ohms out from spec or the thermometer I was using was a little out, but either way it was registering HOT.
Engine was in Diagnostic mode at 1000rpm. How do I check the shaft bush, which shaft? the distributer shaft I assume?
Cap rotor and plug wires are origional - 270 hrs on a 2001 boat
Cap and rotor definitely need to be replaced. I would replace the wires as well. You may be dealing with a simple cross-fire issue.
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