Lots of them last well over 10 years. I would inspect periodically and
replace when it shows some signs of aging on a trailer boat. Keep the
outdrive in the down position while it is stored to increase the life of
them.

"Reginald P. Smithers III" wrote in message
. ..
All of this talk about low transoms and cut out transoms, being the number
one reason for outboard motors sinking, made me think about the number one
reason I/O engines sink is due to a failure rubber outdrive boot.

I check the boot annually and whenever I go in the water, but has anyone
seen a recommended life on a I/O. Seaworthy Magazine recommends changing
them every 5 years, but does this include fresh water boats?

My boat is 7 years old, and the boot seems as pliable w/o any visible
cracks what so ever, but I am feeling it might be time to change the
sucker.