chuckwagon
New member
"MY 86 SEARAY SUNDANCER HAS TW
"MY 86 SEARAY SUNDANCER HAS TWIN MERC 170 4CYLS, WITH CLOSED COOLING SYSTEMS AND ALPHA I DRIVES. FOR THE LAST THREE YEARS I HAVE BEEN FIGHTING AN OVERHEATING ISSUE WITH THE PORT ENGINE. THE ENGINES HAD LOTS OF HOURS SO LAST YEAR I REPLACED THEM. WHEN I DID THAT I ALSO SENT THE HEAT EXCHANGERS OUT TO A RADIATOR SHOP TO BE CHECKED AND CLEANED. REPLACED THERMOSTATS AND CHECKED FOR ANY FOREIGN MATERIAL IN THE COOLING SYSTEM. TO MY DISMAY I STILL HAD THE OVERHEAT UNDER POWER ON THE PORT SIDE. THE MORE YOU PUT POWER TO IT AND THE FASTER YOU GO THE TEMP GAUGE WILL CLIMB, SLOW DOWN AND IT WILL COOL OFF BUT ALLWAYS IS HOTTER THAN THE STARBOARD ENGINE. SO I CHECKED WITH AN INFARED THERMOMETER WHICH VERIFIED THE ISSUE PLUS WHEN IT GETS HOT THE OIL PRESSURE LOWERS FROM THE THINNER OIL. THIS SPRING I REPLACED BOTH OF THE WATER PUMP IMPELLERS AGAIN WHICH WERE ONLY A FEW YEARS OLD. LOW AND BEHOLD THE PORT ONE WAS ALL DEFORMED BUT NOT BUSTED UP. SO GLEEFULLY I PUT THE BOAT IN FOR SERVICE ONLY TO FIND THAT NOTHING HAS CHANGED. PLUS OTHER OUT DRIVE ISSUES SO I PULLED HER BACK OUT AND RECHECKED THE IMPELLER WHICH LOOKS FINE. I TOOK A BOROSCOPE AND INSPECTED THE PASSAGES UP TO THE TRANSOM WHICH WERE CLEAR. I DEFINATELY HAVE WATER FLOW. ALSO THIS ENGINE IS HOOKED INTO MY HOT WATER HEATER. IM SICK AND TIRED AND CONFUSED PLUS NOW IT SEEMS THAT I COULD USE LOWER GEAR CASE WORK. WHEN I MANUALLY TURN THE DRIVE, SHAFT AFTER I INSPECTED THE IMPELLER, TO MAKE SURE FORWARD AND REVERS WORK IT FEELS CLUNKY AND I SEEM TO GET EXCESSIVE SIDE TO SIDE MOVEMENT. THIS IS WITH THE UPPER WATER PUMP HOUSING REMOVED. HELP!!!!!!! 4TH OF JULU VACATION IS COMING UP."
"MY 86 SEARAY SUNDANCER HAS TWIN MERC 170 4CYLS, WITH CLOSED COOLING SYSTEMS AND ALPHA I DRIVES. FOR THE LAST THREE YEARS I HAVE BEEN FIGHTING AN OVERHEATING ISSUE WITH THE PORT ENGINE. THE ENGINES HAD LOTS OF HOURS SO LAST YEAR I REPLACED THEM. WHEN I DID THAT I ALSO SENT THE HEAT EXCHANGERS OUT TO A RADIATOR SHOP TO BE CHECKED AND CLEANED. REPLACED THERMOSTATS AND CHECKED FOR ANY FOREIGN MATERIAL IN THE COOLING SYSTEM. TO MY DISMAY I STILL HAD THE OVERHEAT UNDER POWER ON THE PORT SIDE. THE MORE YOU PUT POWER TO IT AND THE FASTER YOU GO THE TEMP GAUGE WILL CLIMB, SLOW DOWN AND IT WILL COOL OFF BUT ALLWAYS IS HOTTER THAN THE STARBOARD ENGINE. SO I CHECKED WITH AN INFARED THERMOMETER WHICH VERIFIED THE ISSUE PLUS WHEN IT GETS HOT THE OIL PRESSURE LOWERS FROM THE THINNER OIL. THIS SPRING I REPLACED BOTH OF THE WATER PUMP IMPELLERS AGAIN WHICH WERE ONLY A FEW YEARS OLD. LOW AND BEHOLD THE PORT ONE WAS ALL DEFORMED BUT NOT BUSTED UP. SO GLEEFULLY I PUT THE BOAT IN FOR SERVICE ONLY TO FIND THAT NOTHING HAS CHANGED. PLUS OTHER OUT DRIVE ISSUES SO I PULLED HER BACK OUT AND RECHECKED THE IMPELLER WHICH LOOKS FINE. I TOOK A BOROSCOPE AND INSPECTED THE PASSAGES UP TO THE TRANSOM WHICH WERE CLEAR. I DEFINATELY HAVE WATER FLOW. ALSO THIS ENGINE IS HOOKED INTO MY HOT WATER HEATER. IM SICK AND TIRED AND CONFUSED PLUS NOW IT SEEMS THAT I COULD USE LOWER GEAR CASE WORK. WHEN I MANUALLY TURN THE DRIVE, SHAFT AFTER I INSPECTED THE IMPELLER, TO MAKE SURE FORWARD AND REVERS WORK IT FEELS CLUNKY AND I SEEM TO GET EXCESSIVE SIDE TO SIDE MOVEMENT. THIS IS WITH THE UPPER WATER PUMP HOUSING REMOVED. HELP!!!!!!! 4TH OF JULU VACATION IS COMING UP."
