I am dealing with a customer boat 2007 Yanmar 6lya-stp 370hp with a neglected cooling system. I tried to drain coolant from block petcock and not a drop.. after inserting 6'' screw drivers into hole came nothing but brown hard sludge... not a drop of liquid! Upper coolant reservoir & heat exchanger top showed rusty brown water, not pretty.
It should be flushed several times to operating Temp & filed with a O.A.T. ELC or Dexcool per Yanmar specs.
What would be a good product to remove sludge buildup???
This engine ran 30 hrs at 80% (2800 rpm) power 400 miles just a few months ago @ 170F with no issues, but I think its a ticking time bomb...
any suggestions?
Thanks,
Capt
It should be flushed several times to operating Temp & filed with a O.A.T. ELC or Dexcool per Yanmar specs.
What would be a good product to remove sludge buildup???
This engine ran 30 hrs at 80% (2800 rpm) power 400 miles just a few months ago @ 170F with no issues, but I think its a ticking time bomb...
any suggestions?
Thanks,
Capt
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