Re: [Cal_Boats] Overheating engine Part 2

Had a customer with much the problem and the diesel rain good at idle but when it pulled away from the dock it died.It turned out to be a separated liner in the exhaust hose . With no pressure at idle ran but when pressure built enough pressure for the liner to shut the flow oberheat engine and kill it. Just a thought John Boyce <je… [at] gmail.com> wrote: >A couple of weeks ago I wrote about my engine overheating and after several >days I thought I had limited it to a bad thermostat. I have since replaced >the thermostat, all water hoses, the pump impeller (again), pushed city >water through the thru hull and I'm still not sure what the problem is. For >one more test I connected a garden hose to the pump inlet and ran water >through the engine successfully, I didn't have a recycle stream so the >engine stayed cool with no exhaust discharge. I then put the pump suction >into a pail of water and nothing was sucked up into the engine, this seems >to indicate a bad pump but with new impeller and no leaks is this likely? >The pump is an oberdorfer, the engine is a universal 5411. IO've thought >about looking for an electric pump to try to resolve the issue but I don't >know what size to get. Any ideas? > > > >Thanks for any help > > > >John Boyce > >Cal 227 Gotcha Again >