I used Gallery Marine in Seattle for a couple of years for work on my Yanmar. The mechanic was excellent, professional, and very conscientious. They replaced my turbo charger and all related hardware, water pump, and a bunch of electrical work. Our relationship was very good including communications and billing.
Then one day... The mechanic came out to change a split hose and clean an electrical connection. The hose and the electrical connection were both very accessible and took less than 45 minutes to finish the job. Then the bill came - $744.85. Gallery Marine charged me 5 hours of labor at $115/hour plus the $35.05 cost of the hose.
After contacting Gallery Marine's manager, he stated that the bill included 4.25 hours of travel time. It's a 40 minute drive from Gallery Marine to my boat. They would not adjust the billing.
Haven't used them since.