40 Hp Etec Running Rough

[pappy]

hi all i have a 2008 40 hp etec and it starts and idles ok but when it in gear and moving and it gets to about 2000 rpm it runs a little rough like is missing as it gets past these revs it runs ok right out to wot at 5800 rpm .is it the plugs or is it the motor changing from low to high rpms .cheers pappy

Edited April 12, 2010 by pappy1

[slinkymalinky]

G'day Pappy,

Sounds like it might just need a service and some new plugs. My 75 started getting a little ragged like that getting close to its first 300hr service and was sweet as a nut after it got done. Give Huett Marine a call.

Cheers, Slinky

[a boat]

Hi Pappy, could be alot of things like bad fuel, blocked injectors or as Slinky said the plugs might need attention. Best to remove a plug and inspect and the gap wants to be 0.25" and make sure you index correctly. Also why you are at it you should confirm the thermostat is doing its job and the engine is not running cold becuase they do not like that.

Pull the plugs and let us know what they look like and/or just fit new ones.

Cheers,

Huey.

[pappy]

thanks i will check the plugs and see how they are .i always use new fuel and brp fuel conditioner .as i said it only does it at about 2000 rpm could a bad plug miss fire at just that rpm and not at all rpms .cheers pappy

Edited April 13, 2010 by pappy1