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Old 06-07-2015, 16:16   #1
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2003 3gm30 clear blockage or clean heat exchanger.

FP Cat yanmar with sea drives. Noticed steam in starboard exhaust, changed water pump, mixing elbow, no improvement. End of season when hauled I noticed a lot of growth around intake and figured I found the problem. The bottom was painted and I assumed the blockage was removed. I did not request this but boat was launched and the problem continues. Is it possible to clean the port on the sea drive without hauling. I pulled the hose and could blow through easily. Or could it be clogged tubes in the heat exchanger. Any suggestions would be great.

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3gm, 3gm30, heat exchanger

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