Evinrude 1999 EFI 4-Stroke Idleing Issue

[CaptainRhys]

Hi everyone, need a little help
1999/2000 Evinrude 50HP 4-Stroke Electronic Fuel Injection
Has been idle for 5 or 6 months now
Starts up fine, Then ticks over very badly. Sounds very rough, and stutters in a fluent rhythm
However when i put it into gear and rev it it goes fine and sounds perfect but useing the neutral revving throttle the stuttering just gets louder
I've tried Fuel Injection Jet cleaner and i'm going to go and get some new spark plugs tomorrow and may possibly get a diagnostics run on it
Could this be down to a faulty sensor?
So far i've had no luck
Cheers

[CaptainRhys]

Anyone? I'm getting kinda desperate lol

[CaptainRhys]

Doesn't matter. I've fixed it now. The vacume hose had come off lol