thanks guys found out 50:1 is the ratio i should have been using and
the problem turned out to be the vent on the fuel tank was rusted and
not breatheing....

"flwlss" wrote:
purchased my first boat around 6 months ago, was running real
rough, problem turned out to be a sparkplug, now since having
them replaced, the boat runs beutiful, accept after its been
running flat out for about a minute it starts to loose power
and start slowing down, splutters a little but not to much,
but once you let it run slowly for a bit, it will again go
flat knacker and loose power again after about a minute, does
anyone have any idea what this could be in relation too?

running a 20:1 mix which is what previous owner has told me to
use.