Hi,I have an issue with my outboard and i noticed it about three weeks ago when i went out to bobin head after a day of use. I was driving back full throttle and then suddenly the rev's just dropped from 6000 rpm down to 3000 rpm and it would not rev harder despite having the throttle right down , occassionally while limping back on 3000 rpm it would rev up then straight away drop back down to 3000 rpm. A couple of factors i can think of are i used e10 by misstake about three weeks ago which i drained out since , and i removed the under floor tank when i first purchased the boat about 2 months ago just to drain the stale fuel and clean it out. Im pritty sure its not over heating as i have just done a full service on the boat and replaced the impeller and plugs and gearbox oil about 4 weeks ago.