RE 1.7 DTI mine has an 88 serial number.
I have recently bought a rib with this 120hp engine, we contacted Mercruiser to confirm the serial number mentioned in this post. I have today received an email from them saying that my engine serial number 88110661 has the redesigned oil nozzle spray pattern and revised pistons. They do say that the turbo over boost remains an issue and it’s been suggested that a boost gauge could assist with early warning, should the actuator arm start to meet resistance (seized waste gate) creating over boost.
This post shows someone’s rather rusty waste gate.
pictures of faulty mercruiser turbo
Boat design is important, you wouldn’t want salt water coming in to the engine bay, if you accidentally reversed to fast...
The ribnet web site has been a great reference tool for me and I have deduced that as long as the engine is not overproped, the waste gate has an eye kept on it, it’s well maintained, it’s should be good for the recreational use it was intended for. My engine has been well maintained and benefits from a recently replacement turbo and assembly. I hope my post can assist others with their quest for knowledge. If I put my figures round the actuator arm that opens and closes the waste gate. I can feel it move when the engine is running under load and the throttle lever is moved back and forward gently. I’ll start a new tread with how I fitted a boost gauge and the results later.