So I was poking around under the outboard cowling and I was shocked to discover that 3 of 4 spark plugs we LOOSE! So loose they were wobbling around in the socket. Last spring I had the local Yamaha service center check out the compression, which was all good. Since then I haven't really had a close inspection, but I thought it seemed recently a little slower to cold start. I had not notice any reduction in power, but I haven't had the boat that long. Is it possible that they didn't tighten them enough after checking the compression, or do plugs on outboard tend to work themselves loose?