Originally Posted by hard1
See my post above - sounds like exactly the same fault (except the spark plug bit which I am quite dubious about). I am surprised you didn't notice it was only firing on only 5 cylinders, as this would have taken some time to damage the bore (if true).There was no warning for him either. I would be grateful if you could find out which cylinder it was. My friend got a brand new engine out of them.
there was no special vibration. While testing different props, even my dealer didn't notice anything.
When we bought the boat, we did the prop testing on a river (our dealer has a slipway on that river). With our current prop we reached 5700 RMPís with 2 adults and 180l of fuel.
But we are always navigating on the sea and mostly with more than 2 adults (4-5). During the end of September, beginning of October we noticed that at WOT we did only 5400 RMPís. But that might have been to extra weight on board (40l of spare fuel, all kinds of boating gear in the trunk) and not being able to trim as much as on a river.
That's why we thought, the prop is too big and we were testing a new one.
I donít know which cylinder it is. Iíll ask my dealer tomorrow.