yamaha 15 hp 2005 4 stroke problems

[falcon0310]

engine bit ruff splutters no smooth on rev range any ideas ?
put service kit in oil filters plugs filter gear oil and new super plus unleaded
then change the bulb
carb ?
thanks adrian

[Poly]

Are you saying you have done these things or asking if you should? (and if you have was it only after the service it became unhappy?) is the second filter you mention the fuel filter? what do the plugs look like? Does priming the fuel line help it?

[falcon0310]

poly,
done all the above, yes was same before

[matt h]

As asked. What do the plugs look like ? ( apart from the obvious)

Water in carb?
Clean carb out inc jets etc