I put boat in water yesterday for first time. Engine was quiet and ran smooth. After running it for a while at mid RPM's I ran at WOT for a couple minutes.<br /><br />There is now a noticeable tick in the engine. Sounds like it could be a lifter. Is this common? Are the valves adjustable on these engines?<br /><br />Engines has about 200 hours on it and it has been well maintained. Oil is clean and up to level.<br /><br />Suggestions...