The below charts an provide useful guidance to identify issues with the engine.
Here are some useful information on the Yanmar 4TNE98 and 4TNV98 engines.
The below link takes you to the data sheet of the Volvo Penta D2-55 engine: Volvo Penta D2-55 Specification Sheet
This is just a part of a manual that we found on manualslib.com. If you need some technical help with your diesel machinery or marine engine, just give us a call!