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    Drive stays in position where set downwards and upwards…but…

    Wherever the position of the drive is it can be manually lifted upwards but doesn’t move downward if you try to push it down. This isn’t normal obviously so does anyone have an idea of what might be at play here. I’ve bled the lines, there are no leaks anywhere, and the motor is working...
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    My stern drive

    Can anyone identify this model of Mercruiser stern drive. I’m thinking it’s pre Alpha.
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    Trim pump problem

    I believe there may be an O ring issue in the trim pump valve assembly as my stern drive doesn’t stay up for long and drops overnight. I can manually lift the drive about halfway and then it stops. I ruled out air in the line as I did a complete bleed last year before storage. The motor works...
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    old engine serial numbers

    1975 233hp 351cu Ford Mercruiser (Cleveland) 2 barrel carburetor that has a serial number that is no longer usable when ordering. i found a tiny plate that had a serial number on it but it was useless for ordering parts. is there a way to get serial numbers that may work? thanks to all who reply.
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    Small hole warm water exit lower drive unit opposite drain plug.

    On the opposite side( right hand if looking towards the bow ) there is a small pencil diameter hole that is jetting out warm water when the engine running. My stern drive is 1 generation Alpha 1975 233hp 351 Ford Mercruiser (Cleveland I think) I’ve never noticed water coming out of there before...
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    140 or 160 thermostat. Does 20 degrees make a difference?

    Running a 140 thermostat on 1975 233hp 351cu Ford mercruiser when the suggested thermostat is 160. I’ve not noticed anything wrong with the engine’s performance but after cruising the temperature goes passed 140 to 160 plus but goes back down quickly to 140 after slowing down. Is there anything...
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    left y exhaust ( helm side)hotter than right

    so i’ve been in a conundrum of exhaust cooling system advice and now “here’s the deal “ to paraphrase President Biden! both “blocking plates” from the manifold to heat risers in a 1975 351cu 233 Ford Mercruiser have been removed with a substantial increase in water flow out the exterior stern...
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    1975 351cu 233hp Mercruiser, riser block off plates or not?

    After a heat riser bellows replacement the mechanic thought the block off plate was causing the overheating in the heat riser causing the left (pilot side) exhaust system to overheat subsequently burning the rubber elbow connecting to the y pipe to burn. I found that part also bizarre but...
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    1975 233 hp 351 ford mercruiser running rough after water/fuel contamination

    started season off well with an engine that ran beautifully until we hit water in the tank,episode out on the lake getting back to shore assisted by Coast Guard, at first big stall then trouble getting going ,boat ran well on and off then we decided to head in and call it a day took out 12...
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