I couldn't begin to touch that one - particularly for 4 strokes.

I do know the 44 cubic inch Mercury 2-stroke 45-50hp 4 cylinder has an
ungodly lifespan though. Likely to outlive it's owner. LOL

-W

"shawn" wrote in message
om...
but can't find any solid data on it in searches. Whats the average
lifespan in hours of an outboard....say a 50hp and a 90hp etc 4
stroke?

example ran everyday not hard but cruising speed. I know theres alot
of ifs etc but somewhere there has to be some data from fishermen,
charter, etc...