Yes, right plug is bottom plug. So I changed the head gasket and that has reduced the amount of water (if it is) in that cylinder. What are some ways for water to get in there. Like I said 135/139 on compression, spark look really good, sprayed carb cleaner in it while idling and going down the river, nothing helped. I retorqued the head gasket 2 times. Changed spark plugs with new one on the river and didn’t change anything. Fresh gas 50:1. I have a good back up motor but would soon rather fix this one if possible and keep back up for now. What are some ways water can get in cylinder? Head gasket, cracked cylinder wall, exhaust gasket? Any other ways ? What is the easiest way to tell what it is.