Suzuki 25HP twin 2008 ignition

[Nygaard]

My 2008 Suzuki 25HP twing engine have a ignition problem.
It starts and runs fin at ideling.
When giving trottle is starts to misfire, like if you pull out a choke on a 2 stroke engine.

My work shop are not able to locat the problem.
Any ideas?

[boats.net]

Does the warning light on front of engine cowling come on? If so check temp and oil pressure sensors.