Engine trouble on 4.3 merc
Went out on the boat the other day and had problems with the engine. Mechanic came out and got it going again after changing 1 spark plug, but said to go back to the marina slow as there was still a problem on 4 cylinder.
They checked it out yesterday and came back and said the the piston was melted, saying that something had gotten into the engine water and blocked the supply to that cylinder. What i need to know from you guys is this.
1 Surely there is some sort of strainer on the intake of the water supply to stop this type of thing from happening.
2 If this was the case why only affect 1 cylinder
3 The heat required to melt a piston, ( if this is right as i live in Turkey and he is Turkish) would be way to high for an engine to still work. Maybe he means it has seized
4 Is there anything else you guys can think of that might have cause this.
This engine was completely rebuild at the beginning of May and had no more than 2.5 hrs running time on it, so is it possible that it was not build correctly.
I am now reluctant to let this mechanic work on my boat again, if the problem is from the rebuilding of the engine.
So hope some of you guys can give me some pointers.
Just bought my 1st boat so just learning.