I have no experience with the 2AB1 models of Isuzu engines.
But I do have lots of experience with the C240 Isuzu of the the same vintage.
The C240 that is in my boat is the same one that was installed in 1981, and has never been overhauled with who knows how many hours. Several tachometers have been replaced, and no record
I did a compression
check last week, and all cylinders were 480# plus or minus a few percent.
is 1/2 qt. between 100 hr. changes, and no leaks
It is my opinion that most any brand or type of engine will last many years and hours if the owners would keep clean fluids and filters, keep the salt water
out of the engine, and pickle the cylinders with a preservative oil spray in the intake whenever the engine is put into storage
for more than a month or two. I also drain the salt water
out of the engine heat exchanger
whenever it will not be used for more than a week. Easy to do, and saves me from corrosion
Indecently, this engine has spent many hours at idle/1200rpm charging
batteries and running the fridge/freezer compressor
while at anchor
, and offshore
, on my trips every year from Maine
to the Bahamas
. No ill effects noted.
If that old engine that you are looking at checks out with a good inspection
, buy it, and save many dollars that you can spend on other equipment
, like new sails
, or an AIS
, or a new chart plotter/radar, or a really good fuel prefilter if your boat does not have one.