Bigboat

Hi. I have a 2006 115 Yamaha 4 stroke which I have owned for almost 10 years. A couple of years ago after consulting the manual I decided to flush it using the inline attachment on the motor. Did this for about 12 months.
 
About 12 months ago I started using saltaway and returned to using the ear muffs to flush.
Today I had the motor serviced. Two of the three water jacket anodes were so badly corroded and salted up it took an hour to remove them. Luckily no apparent damage to the head at this time. 
My mechanic who I have been using for a long time said the 6-12 months I used the flush attachment was enough to salt up and seize the anodes. You could see the saltaway residue where it had started to clear the salt but it had a big job to do.
Morale 1 of the story: The flush port on the motor is designed to ensure planned obselecense and should not be used.
Moral 2 to the story: Only ever flush your engine in a drum or with ear muffs
Mechanic said he had seen motors at 100hrs so badly corroded due to owners only using the flushing port that they had to be written off.
Now I have had a boat for most of the last 45 years and except for that short period I referred to above, have always flushed in a drum or with ears. No more using the flush port for me as today I dodged a very expensive bullet.

Hi. I have a 2006 115 Yamaha 4 stroke which I have owned for almost 10 years. A couple of years ago after consulting the manual I decided to flush it using the inline attachment on the motor. Did this for about 12 months.
 
About 12 months ago I started using saltaway and returned to using the ear muffs to flush.
Today I had the motor serviced. Two of the three water jacket anodes were so badly corroded and salted up it took an hour to remove them. Luckily no apparent damage to the head at this time. 
My mechanic who I have been using for a long time said the 6-12 months I used the flush attachment was enough to salt up and seize the anodes. You could see the saltaway residue where it had started to clear the salt but it had a big job to do.
Morale 1 of the story: The flush port on the motor is designed to ensure planned obselecense and should not be used.
Moral 2 to the story: Only ever flush your engine in a drum or with ear muffs
Mechanic said he had seen motors at 100hrs so badly corroded due to owners only using the flushing port that they had to be written off.
Now I have had a boat for most of the last 45 years and except for that short period I referred to above, have always flushed in a drum or with ears. No more using the flush port for me as today I dodged a very expensive bullet.