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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    Correct, the only thing holding up the LU were the snapped bolts. Heat and wedges did the trick! However, the initial problem still persists: I’m getting an overheat alarm at speed under load. It’s better now but not gone completely. I just ordered a new head gasket and will be replacing the...
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    Luckily I was able to remove the trim tab bolt using an Irwin bolt extractor socket. They are designed for removing stripped/rounded bolts. Worked great, I had to destroy the trim tab to do this but the trim tab has since been replaced with a brand new one. Also, turns out there was no hidden...
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    Nope, runs perfectly fine at idle. It's not until I start accelerating past, say, 2000/2500 RPMs or so that the high-pitch ringing sound starts. It was very faint this time, almost inaudible. Changing the water pump seems to have helped a lot. It only overheats when under load at speed.
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    Bolts in the cylinder head should be OK (hopefully). I’ve heard that flushing the motor will help prevent salt buildup, but if there’s already a clog, the best thing to do is open it up and chisel away at it. I’m still trying to decide how I want to approach this. Probably would be easier to...
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    I pulled the cylinder head cover (water jacket) but not the cylinder head itself. I don’t have a pressure gauge but I’ve been meaning to get one. I was told when I bought it there was 140 psi in each cylinder but who knows if that’s still the case.
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    Roger that. I’ve never seen water come out of the exhaust slits but I’ll check next time. I installed a brand new thermostat and poppet valve grommet recently. The poppet valve itself was in perfect condition. I will for sure bring a temp gun next time to scan the cylinder head too and report...
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    No I haven't tried that yet, but good idea. I don't have a tank large enough but I see this can be done using a mixing unit connected to muffs so maybe I should try that first before opening everything up: (For some reason, the voice audio in this video only comes out the right speaker so you...
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    Hey everyone, I hate to revive this thread after we thought we had it solved but I'm still getting an overheat alarm under load (it's quieter now with the new water pump, but still there). Cylinder heads still feel hot though not quite as hot as before we changed the water pump. I can't touch...
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    😂 Been eyeing the forecast - 56 and partly sunny on Sunday in South Carolina. Should be a great day to get out on the water! Cold front next week though.
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    Haha thanks man. Born and raised in New England, spent 28 years there before moving south a few years ago. Know all about ice. Never looking back!!
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    Ahh, gotcha. I've never personally run it dry but who knows what the previous owners did...
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    FINAL UPDATE: Great news everybody! The mechanics were able to drop the LU by heating the snapped bolts and used wedges to work it down. The drive shaft was NOT fused to the crankshaft, thankfully. The old impeller fins had lost their memory and the impeller housing began melting as a result...
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    Yeah I disconnected the shift rod in the beginning when I was taking out all the bolts. I had to remove the starter to access the shift rod pin. It's back in now for my lake test last weekend but the shop mechanics should know it is part of the disassembly procedure and will remove it again.
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    I remembered this suggestion of yours from earlier but don't own a blowtorch. I have an electric heat gun for heating shrinkwrap which may work. I'll ask the mechanic to try heating the bolts if they haven't already when they call.. thanks!
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    The lower hasn't budged AT ALL. Maybe like 1/16th of an inch on one side (the side without the snapped bolt) but not enough to get any type of wedge in between. The bolts were indeed heavily corroded. There are some pics in post #66 which show how badly salted over they are and the miniscule gap...
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    MINOR UPDATE: I brought the boat to a local outboard repair shop that is highly rated. They have it now and will begin working on it soon. If they cannot get the LU off, my next plan is to bring it to a friend who KNOWS he can get it off (violently if necessary - since it is dead to me otherwise...
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    Yeah I’m going to be calling around this week for help. Will keep you all posted.
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    I’m assuming the impeller hasn’t been changed in well over a year and we’re getting an overheat alarm. Many people suggested starting with the gearcase. While I wait for the parts (poppit valve grommet, thermostat and gasket) to come in for the water jacket, I thought I’d try and get the LU off...
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    UPDATE: Got the rounded out trim tab bolt out! I DO think it was “structural” (attached to the midsection) because of how long it is. Now I can replace it and the trim tab assuming I can get the LU off. The LU has a tiiiiny crack on one side now (the side without the snapped bolt) which leads me...
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    1982 Johnson 50 Sea Horse - Constant Beep While Accelerating

    OK, so I got the trim tab off my prying it with my hammer. It was soft enough that it started to break off in pieces until there was nothing left. There is no bolt underneath, except the main bolt which once held it in. I can get the bolt to spin in place but it will not come out for some reason...
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