Recently my 4 year old Shindaiwa 4-stroke multi- tool quit working due to a broken valve keeper. I thought it was a more serious problem, so I almost threw it away. I ran into someone who used to have a shop that sold Shindaiwa. He was trying to sell the equipment that he had left over. When I described the problem, he immediately told me what was wrong, so I called the Shindaiwa rep. The Shindaiwa rep was very nice and provided a new engine. They had some problems with valve keepers in the early models, so they replaced mine even though it was out of warranty. When it broke, I immediately bought another one to finish the job, so now I have a backup. Their support is just one more reason to buy Shindaiwa equipment.