Hi guys, I'm having trouble with all 3 engines on my Marquis 500 Sport Bridge (2010). We have 3 Volvo Penta 600 IPS Engines on the yacht. We're having trouble with all 3 engines exceeding 2100 RPM. Once it hits 2100 RPM it will oscillate around there but never goes above. It's been happening since mid-march. The turbos start to kick in but then back out. Has anyone had this same issue? We have contacted Volvo and they have no clue as to how to solve the problem. We're wondering if it's a product design defect.