Hi , I have twin Yamaha 150 / 2005 four stroke outboards . One of them has developed a miss when raised above idle . No alarms , and went well last time out as usual . I have swapped every accessible component (plugs,leads,injectors,control boxes) but no improvement . I have checked fuel filters and air flow . Is there a sensor/switch that could cause this or a computer adapter i could purchase to troubleshoot this fault .Any assistance would be appreciated .
Cheers .
Cheers .