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  1. J

    86 305 Cylinders Full of Water

    Well. This isn't the first time. ​86 GM 305 Crate Motor in a 77 Cobalt 19CD ​Situation: Chilling at the dock for around an hour, boat has been running beautifully all day, went to crank it to motor it over to the trailer and it was hydro locked. Got it home and pulled the plugs and there's...
  2. J

    Gimble Bearing Bellows Detached (what now?)

    Welllllll things are interesting with the77 Cobalt. I noticed some water coming in the boat last time I was out. I noticed a bit of oil dripping from the outdrive and thought it must be the trim, but a closer inspection and I see the gimble bearing bellows is detached. The oil is from the lower...
  3. J

    Trim Leak!

    1977 Cobalt 19CD Outdrive: Mc-1 Noticed over the winter the outdrive fell a bit, I already had it lowered but after a month it was fully on the ground. When spring hit I trimmed it up and down a few times and it seemed to lock up fine, until I started seeing this oil... Was fixing the trim...
  4. J

    Carb Crud?

    Rebuilt the old 305 heads and such, got the timing reset, but just couldnt get fuel... pulled the top of the carb off and well... nasty. Gooey, waxy nastyness. I try to stay away from ethanol gas, but this definitely looks suspect. Got the rebuild kit from napa but Id hate to clean and...
  5. J

    Water in the Oil

    Boat Info: 1977 Cobalt 19CD Motor: 1987 GM Crate 305 (VM127337) Boat last ran in October with no issues. Last summer I did have problems with it running rough after it got warmed up. Got bad by the ned of the summer to the point that I had to idle it back to the ramp once, giving it throttle...
  6. J

    Prop for a 62 Merc 700 on a 58 Commando Sport?

    Hey guys, helping out a buddy with a really interesting boat. He rebuilt the boat a few years ago, but the prop on the Merc 700 is a 15 pitch Aluminum 3 blade, its pretty knicked up and only gets up to 35 mph... Doing a little research and we figured that 15 was way too low of a pitch! So what...
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