Just saw this today:
"I had the exhaust stack replaced in my 2004 225hp last week.
It also needed thermostat housings.
When the work is performed, the oil pump should be checked for wear
and the water jacket behind the thermostats should be checked for corrosion.
Substantial corrosion can set up there in the water jacket
but Yamaha has an epoxy procedure for repairing it."
"I had the exhaust stack replaced in my 2004 225hp last week.
It also needed thermostat housings.
When the work is performed, the oil pump should be checked for wear
and the water jacket behind the thermostats should be checked for corrosion.
Substantial corrosion can set up there in the water jacket
but Yamaha has an epoxy procedure for repairing it."
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