On May 29, 11:41*pm, "SteveB" wrote:
Took my boat out today. *It ran fine at first, then has symptoms of fuel
starvation at high speeds, slowing to a crawl, and then hard to start and
keep running. *Then it runs fine, starts fine, idles fine, high speed fine.
Then the other end again. *I'm going to change the fuel filter on the motor
and see if that does it. *After that, I guess it just has to go to the shop.
'89 Merc 4 cyl. 40 2 stroke.

Steve

Possibly a vent clogged on the gas tank creating a suction and not a
freeflow on the fuel?