New mechanic for me, I've been with him for a year. Was billed for a tune up which included new cap, rotor, spark plugs & fuel filters. I was told the wires were good. I picked up the boat a week later than expected due to some issues in the yard. It turns out my boat wasn't winterized correctly. Thankfully (I think) the engines were winterized however the sea strainers weren't back filled with anti freeze so they were blown apart when the water froze. They needed more time to address blown sea strainers which they did at their cost.
Picked up the boat a week later, boat idled fine, got on plane fine but bogged when I went to WOT on starboard side. Engine was surging then dropping RPM, then surging, then dropping RPM. Port engine was fine.
Addressed issues with mechanic when I went back with partial payment of bill. Told him I was going to review a/c sea strainer as well as starboard engine issue. Found an error on the bill as I was billed for 3 batteries when only 1 was replaced. Mechanic admitted his mistake when he wrote the bill up. Was he trying to recoup cost of blown sea strainers though???
Reviewed spark plug wires to see if they were properly seated to distributor cap & plugs. Inspected distributor cap, it was last years and was not replaced although I was billed for it.
Flame arrestor was not cleaned.
Those, amongst some other things, are my issues. Not sure what to believe in as so many things were not done.