, pushing around a 26000 pound boat.
How long should it take for this engine
to get to operating temp? I've owned the boat for 5 years, finally began to use it frequently last year, two or three weekends a month, often overnighters. This engine has always taken almost 45 minutes to reach 180°, the after i changed the coolant
last year it stabilized at 190°
Late latst year the engine suddenly made some odd noise
then stoppend, we were in shoal water
and dropped the hook. When the engine cooled, it started right up. and we nursed it the two miles home at low rpm
. The rest of the year, maybe ten hours of motoring we ran with no problem.
Decided to take the heat exchanger
apart for servicing, found some of the tubes plugged with SF Bay
mud, but all was OK. Reassembled with new thermostat and gaskets and idled at dock
, and new, entirely new water
pump">raw water pump, it still took 45 minutes to warm up but everything seemed OK, as it had always been, No change in level of oil
from when it was first fired up.
Four hours later, boat is packed for the first trip of the year and we head
off, everything seemed fine until we put it up from idle in gear
to 1300 rpm
, then suddenly same noise
and just as quick the engine stops, this time I notice the engine water temp is nearly pegged, way too hot, obviously. The next day I went back and found the water level in the Hx exactly where it was and the crankcase oil
is flowing beter than ever with restrictions removed from the raw water
system and new pump, new thermostat. The mystery is why does it take so long to warm up, and now why doesn't it cool. We are thinking maybe the engine water pump may not be pumping, after all it is 40 years old and could well be shot.
Thanks for your thoughts