[C320-list] Yanmar cooling hose

[Scott Thompson]

Does anyone happen to know what the correct hose diameter is for the raw 
water intake circuit on the Yanmar 3GM30F, Euro model circa 1999?  My 
recollection is 5/8" ID, but I can't get down to the boat today to 
check, and wanted to buy some before going again.  At launch recently I 
noticed some of those stress cracks in the intake hose on the 
through-hull that others have reported periodically.