The most concerning part of this picture is the fan. The fan should be clean and you should be able to flick it with your fingertip and watch it spin. If it doesn’t spin freely, the problem with your lack of getting RPM is indeed the turbo. You are probably also blowing out smoke as you increase the RPM with a damaged turbo.
You have just found out how expensive turbos are for a marine engine. Save your old one and hunt for an automotive turbo repair shop during your travels. They are common. The chances are it can easily be rebuilt for not much money (under $200).
With best regards,
Sailing Vessel - Cream Puff - SM2K - #275
Currently cruising - Tahiti, French Polynesia
[mailto:main@AmelYachtOwners.groups.io] On Behalf Of Rob Hughes via