Originally Posted by Cigatoo
I can vouch that all of the rubber parts that I had on my Yanmar were heavy duty and 1st quality. This includes the Yanmar mounts, water pump impeller, and hoses. My Yanmar mounts and hoses were 20 years old when replaced as maintenance items. No apparent defects at the time. Recommended replacement of the pump impeller was 600 hours. It would come out looking new. I wouldn’t give it a second thought based on my experience.
Basically agree with above. Mounts are now 15 yrs and seem fine.
I had an impeller fail at 4 yrs (& ~150 hrs) when purchased and now change mine after 3 yrs and 400-500 hrs. A lot easier when they come out whole vs 50 +/- pieces!
I'm in fresh water and have switched to all Alum anodes. I find them more readily available and couldn't locate all Mag when I looked.
If interested I can provide my list for my Yan 6LYA STP.
FYI Steve Cyr's Stella Blue website is a wealth of info for MS 400T