1997 Mariner 150 0G508602.
I am rebuilding this engine. I went to European Marine web site to order bolts and some other needed parts. I see that one bolt is 4 dollars an another was 112 dollars so I assume that is a full set. With some checking I find no you have to order 24 of the 4 dollar number and that 1 bolt is 112 dollars. Anybody know what is so special about the one bolt? My engine does not use it. Only 200 hp engines use it.