My boat just had its 300 hour service after owning it for a couple of years. Religiously had it serviced as required by the warranty, by the company that sold me the boat and engine. From about 150 hours of use I started getting overheating warnings and the engine going into guardian mode when I accelerated hard. Despite bringing it to the attention of the service manager there was no improvement. At a friends recommendation I took my boat to Shannon Marine last week. He had it for a week and did a thorough diagnostic and was able to I identify a couple of issues which have been fixed. Went out yesterday with my daughter and the dog for a test drive. Engine was quieter, ran smoother and had no issues with the accelerator. Caught several salmon and a tailor, went for lunch at the fish market all in spring sunshine. I have no connection with Shannon Marine but happy to recommend them after my experience. Cheers Anthony