Boat has been stuck in marina for 12 months, while I worked on her, ran motor
every couple of weeks in gear
,went to take her to slipway today, could only get 1.5 knots, figured prop had barnacles
etc, and perhaps could not open right up,(folding prop) managed to get 3/4 way there then lost
all forward motion, took her out of gear
and I had an oil
slick coming out the stern, its an SD20 behind a 3 GM yanmar
27hp, anybody got a guess what could be wrong. Have yet to slip her.