I've owned my boat
for less than six months but haven't been able to use it as often as I'd like due to Covid lockdowns. However, all is not lost
as this has given me some time to get to know the systems onboard and muck about with the engine
I have a Volvo Penta
2003 inboard (1.3L 3 cylinder 28hp diesel) with a shaft driven folding propeller
. I see Mr Coriolis has done his work
in the southern hemisphere as the prop spins anti-clockwise
doesn't seem to use much (if any) oil
and I haven't had to touch the coolant
level. It has no obvious leaks
and I've changed all the filters. There were a couple of small fuel leaks
around the injection pumps, but I fixed them earlier today. See my other thread if you want to see how I did it - thanks in no small part to some excellent advice from others on this forum.
Yep - its an old engine - more than 30 years old. It doesn't have a tacho so I'm not sure how many hours it has on it. However, it runs well. It propels a 40ft boat
along pretty well (6-7 kts) and always starts easily, even when cold.
The engine blows a bit of white smoke - mainly when cold - but it still smokes a bit when warm too. It also leaves a small sheen of fuel
from the exhaust
. Again, it's worse when cold but it doesn't completely go away when warm either.
I appreciate it's not a high tech engine and its not a new engine - geez 28hp from a 1.3L diesel
? My car gets 308hp from a 3.0L diesel
I'm not sure if it's clunky because it's a three cylinder, because it's old or because it's out of tune. Actually, I'm not even sure if it IS clunky - maybe that's how they all are!
I was hoping, after I fixed the small leaks from the fuel pumps the engine would run smoother (due to higher fuel injection pressure) and magically stop smoking but it seems exactly the same - minus the smelly leak of course.
So my question is, how do you tune up one of these engines and how do you know if it is in or out of tune?
I've learned you can adjust the injection timing by the thickness of the shims under the injector pumps. It looks a simple matter to experiment
with thicker and thinner shims, but what are you looking for when you do it?
The engine seems pretty solid, simple and everything is mechanical. There is no idle, no mixture and obviously no spark plugs (or glow plugs). What else is there to tune on these engines?
Thanks in advance for your advice specific to this engine (and/or the other 2000 series Pentas).