If one is trying to speculate how many more useful hours does that engine
on that boat you are looking at, have? - the answer can only be :- UNKNOWN.
However, if you are going to have the boat surveyed, it is worth getting the engine surveyed separately.
Does the boat have a log showing maintenance
activity over the years ? What is the condition of other mechanical and electrical
components, (that is a fairly good indicator of maintenance
levels Did the owner have a scheduled plan for specific periodic tasks.
Does the present engine's 62 HP power curve match the boat's requirements?
Also need to know something about the boat :- designed hull speed
, access to the engine etc.. ?
Also need to consider existing transmission
, prop shaft and coupling - present exhaust
Assuming that the engine was maintained as per service
manual AND was operated in terms of correct accepted operating practice; over the last 25 years PLUS a positive survey
report from a qualified Diesel
Technician. Then there is nothing to say that this engine cannot run another faultless 2,200 hours.