Originally Posted by Ex-Calif
Wow - These guys are nuts - It sounds like.
It's been in the water alone for 2 years? Holy cow!
There was a thread here recently about recommissioning a diesel
. We ended up with a pretty good list of things to do and it sounds like these guys aren't doing many of them - LOL...
Check/change the oil, filters etc
Check/change the fuel, filters etc
Check/change engine belts
Check/change fresh water fluid, cap etc
Check/change the raw impeller, inlet strainer thru hulls, disconnect supply to pump and check for water flow - reattach
Remove injectors for cleaning
While injector are out rotate engine, spray light coating of oil in cylinders
Remove water supply from riser
Run starter and inspect for water flow to riser
Check for oil pressure
Check for fuel from injector lines
Attach water hose to riser
Check/clean exhaust riser, exhaust mixer etc.
There may be a few more steps. Maybe others will chine in...
My gut feeling is that the owner probably does not have the budget
to do a thorough recommissioning. Plus, we do not know why the boat was left to begin with, maybe there was a death in the family
and he had to go home in a hurry and once halfway around the planet all the myriad of "important" things that need to get done all conspire to keep you from what you were doing before, then next thing you know 3 weeks has turned into two years...
Anyway, I've had a few instances in my life where I was getting fed up with some lazy or irresponsible ass only to realize later they were just normal people dealing with some terrible situations not of their own making that I wouldn't have wished on anyone.
At any rate, to get back to the water pump issue I am now guessing that the boat has been in the water all of this time. It is possible that something has made a home in the cooling
intake. OOps, let me back up a bit here.... If you have no cooling
water from the pump output you can only have 3 things that cause this (well 4, if there is a mechanical issue preventing the impeller from turning) But either the impeller is faulty/worn/disintegrated, the water intake is obstructed, or the cooling water supply line has a vacuum leak somewhere.
will show if the impeller is bad and just bump the starter or turn the pulley if belt drive to verify it turns. This may seem simple but I once installed a new water pump to fix an overheat which it did not do, long story short is the new impeller spun on the shaft which took me several days (hey I was green back then!) to figure out after checking out every other possibility.
If there is a vacuum leak in the line it will seep water. This would have been noticed by now so I do not think it is the cause but it needs mentioning for the sake of completeness.
That leaves an obstruction to be the most likely cause. If possible try to snake a wire down the line. Hopefully the intake has a seacock on it, close that and remove the hose from there and put a straight section that goes above the water line if need be. If there is a tough blockage and this is legal
to do where you are, try pouring white vinegar down it to loosen up any barnacles
or mussels, etc that may have made a home in there.
I once had to fix an overheating
engine that turned out to be caused by a cigarette filter of all things. It made its way into the intake of a race
boat and past the seacock but jammed up at the fitting. It was not dislodged by air and in fact passed all the bubbles too but when the pump started sucking it would seal up the intake, and it was just a tiny regular cigarette filter....
Anyway, I'd try using a section of 3/16" steel
cable if possible, if you can get that through maybe chuck it in a cordless drill and let it rattle around a little bit but do not do the drill thing if it is still hooked up to the cooling lines as there is the possibility of eating away at the inside of a line leading to a midnight surprise at some point in the future. And as mentioned, I'd suggest some vinegar soaking if it is allowed.
Best of luck!