casperfast
New member
help a rookie boat owner out. I'm told this is a 305 GM. but the boat is a 1971 and I can't find any info on a 71 305 so im thinking it is a 307. thank you. any input u have about the entire setup is appreciated. the reason I'm trying to identify is so I can replace it. the person I bought it from told me that it was properly winterized. But upon looking at it closer after I got home I realized that the block drains Were not open, when I opened them water leaked out so I know the block was filled with water. I'm assuming that it froze and I'm guessing I have a crack in the block under the intake manifold. But no freeze plugs popped out or anything. When I pulled the oil drain plug to change the oil about two quarts of Clearwater poured out before the oil. So I wasn't sure if it got water in the intake somehow while it was parked so I change the oil flush the fuel tank fuel system new fuel filter the engine fired right up. I did have a hose connected to the fitting on the outside of the drive. This is my first boat and yes I did just get it but I'm learning. The boat ran perfect had good oil pressure all my gauges were working then I rented about three minutes shut it down check the oil and found a pure milkshake.
