My DV20 is now 28 years old and has for the past few years always had a fair bit of steam in the exhaust
. The engine
temp does not go into alarm
even at full throttle in the winter months with sea water temp around 10 degrees C but will in the summer with sea water temp 20 degrees C.
The flow should be about 11 litres per minute at 2000 rpm
but mine has never been that high. At last measurement I was getting approx 6 litres per minute.
I can just hold my hand under the exhaust
flow so guess we are running at 60-65 degrees C. The alarm set point from memory is 80 degrees C.
For the last 4-5 years I have been using a Saltaway injection system that injects Saltaway into the cooling
water at the inlet filter for 20 secs before engine
shutdown so that block sits with this solution until the engine is next used. This system has kept us out of the temp alarm area since being fitted.