80hp Prob

HI ALL,
Iv just recently bought a boat with a 2005 80 hp 4 stroke yamaha on it its a fuel injected model with 290 hrs on it.
iv ran it on muffs a few times it starts no problem , then it runes a bit erregular for a few secs until it finds its idel at 800rpm and ticks away fine,
the problem im having is when i switch it off and go to start it again straight away it keeps cutting out and wont start unless i give it some trottle.
if anyone has any info on this it would be great. thanks

try a new set of spark plugs, sounds simple I know but the four strokes are more picky than two strokes about there spark plugs

try a new set of spark plugs, sounds simple I know but the four strokes are more picky than two strokes about there spark plugs

HI TECHMAN ,
thanks for the reply iv changed the spark plugs , oil and fuel filter but its still the same any other suggestions.