I have a Yamaha 350 2009 on my 275 Tournament . I have the 2 external zincs that sit in the water changed anually. Does anyone have experience regarding when to change the other many engine mounted internal zincs. Thanks, ron t
According to the Yamaha service manuel, they are on the exhaust joint,cylinder head,cylinder block,regulator cover,thermostst cover,crankcase cover and exhaust guide. ron t