1982 Classic 50 4 cylinder started idling funny last time out and don't have full power, lost some oomph to get up on plane. Got home and pulled the plugs (was thinking a fouled one) and found the top to be a little milky. Cleaned them all up, ran it on muffs again for a bit and found the top one dirty again. Pics below. This is from just running a min or two, when I first pulled them it was much milkier. Second pic is #2 cylinder for comparison. Thinking head gasket but not sure. Any thoughts? All help is greatly appreciated.
Thanks.
EDIT - Also checked compression and found it to be fine.
Thanks.
EDIT - Also checked compression and found it to be fine.