Riva seized engine

This October we were contacted by the boat captain and asked to winterise a Riva Ferrari at our base in Geneva. happy to assist we arrived and started working though our process. draining the fresh water tank, water heater, grey and black water tanks & charging the batteries. Before drawing our attention to the engines.
We started with the port engine and although the engine started and ran without an issue, we did notice a small amount of emulsified oil on the filler cap. This as usual was noted, photos were taken to be added to the work report of the owner and an oil sample was take for analysis and our records. When moving to the starboard engine, things got more complicated. When we attempted to start the engine, the starter motor would not turn the engine over. Instead, just engage and click.
The tell tale signs of a bad earth or flat battery, we started there. After a few checks, the batteries were healthy and the connections were all good. Second port of call was the start motor itself, but its mounting location in the engine made for a significant time commitment to remove and check, so thinking back to a seized engine we were called out to sort at the end of last year. We removed the spark plugs, put a socket on the crank pully and applied some light pressure. To my surprise, the engine was seized solid.
At this point, we updated the office and put a rush on the work report and then completed the winterisation. As we had already removed the spark plugs, we decided to fill the cylinders with a light weight penetrating oil (one we keep in stock for just such an occasion), draw a oil sample from the sump and fill the drank case with oil. Like the port engine, there was signs of emulsification on the oil cap, but not enough to suspect a seized engine.
A full report was then completed and sent to the owner with our recommendations on how to proceed. But we are safe in the fact the oil added to the boat will stop the situation getting any worse and hopefully improve it by the time we hear back.


Posted on

20 July 2020