One day on the water the boat starting missing and would only get on plane occasionally, but had this terrible tapping coming from the driver side of the engine. Sounded like a lifter tapping. Got it in the shop and pulled the valve cover to make sure the rockers were not working their way loose. All was good. Put everything back together and checked the compression next. The second spark plug I pulled I noticed had water on it. So we turned the engine over and it shot probably a cup altogether of water out of the spark plug hole. My first thought is head gasket or cracked head. This cylinder had around 125 psi. The first cylinder I checked had about 135. After finding the water I didn’t go any further. Is there something else I need to look for? I’ve read some stuff about possibly the exhaust manifold. There is no water in the oil and it doesn’t get hot. Any help is appreciated. Thanks!
