Penta Discuss Volvo Penta Marine Machines Within.

revolution problem

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Old Jun 26, 2021 | 10:56 AM
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clebeau's Avatar
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Default revolution problem

I have a big dilemma right now. I have 2 Kad 42s in excellent condition in a Sunseeker Thunderhawk. Pressure is 300 psi on the 12 cylinders. The turbos are new. My feet are dp d1 with c5 propellers.
In neutral the both engine revolve up to approximately 3900 rpm. My starboard engine reaches this revolution faster than the port engine. Once engaged, my starboard side performs wonderfully. Port is dragged along and I am not able to go higher than 3000 rpm. The boat has just returned to my mechanic's workshop. But the holidays are approaching and I want to quickly find the source of the problem. Does anyone have any ideas on the possible sources? Since I own the boat It's been the same problem. But there, the problem seems to be getting bigger. Thank you
 
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