I am sorry to hear that such a large investment has these kind of problems.
If it was started by the spark plug, could it be metal fatigue from someone setting the gap multiple times? I have never seen an engine blown over a plug but anything is possible. You might contact the plug manufacturer and see if there is an issue with this plug and force a recall. Again, I don't know it is the plug but it might save others.
If it was started by the spark plug, could it be metal fatigue from someone setting the gap multiple times? I have never seen an engine blown over a plug but anything is possible. You might contact the plug manufacturer and see if there is an issue with this plug and force a recall. Again, I don't know it is the plug but it might save others.