Ahh, so it has finally cooled off in Greece. But what a nice October we had this year eh?  As you have already suspected I am sure that the difference in the flow of the oil is just the viscosity has increase from the temperature.  This is the same reason that changing engine oil with the engine warm, much easier.  In the future if you have the same problem,  just put some gentle heat on the unit such as a 100 watt clamp light or a small thermostatically controlled heater  (in a pinch a hair dryer, but keep an eye on these things, not rated for continuous use) .  No need to get anything really hot, just bring the oil up to 100F or so and it will be much thinner and should flow.  It might take hours of gentle heating to accomplish this, especially if the 54’s have fibreglass cases on the lower units of the bow thruster which does not conduct heat very well.  Hope you also had a good season in Greece this year.

James

SV Sueno

Preveza,  Greece

Also now high and dry..