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    1987 50hp Evinrude E50TLCUD Thermostat Replacement

    Guys in a thread from last year you suggested the same, and you were correct! I did totally break down thr carbs and cleaned ALL the paths as suggested, and they were indeed gunked up, fishing line for the win. What I am dealing with now is no/intermittent spark on the lower plug. It should be...
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    1987 50hp Evinrude E50TLCUD Thermostat Replacement

    One thing I learned with all this is if you want to buy a boat, do it long before your kids are colleg age, because it's hard to say you can't afford their tuition as you roll up with a new boat. But back to the motor, I was messing around with it yesterday, and unbelieveably I saw no spark on...
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    1987 50hp Evinrude E50TLCUD Thermostat Replacement

    Ok reporting back from the dock. Still has the problem of bogging down in gear. The bogging down problem is new, it started the last time I had it out before I changed the thermostat. Here is what happened exactly: [Last trip before changing thermostat] I was cruising around, fishing was not...
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    1987 50hp Evinrude E50TLCUD Thermostat Replacement

    The old tstat was stuck closed, I finally got it to open at around 170 degrees.
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    1987 50hp Evinrude E50TLCUD Thermostat Replacement

    Thanks guys, learned something new today. Looper vs crossflow. Ok so I put the seal flange in backwards. Can't undo that. My thinking was with the flange point towards the block the thermostat it sat in there better and did not move around when assembling. At least anyone with the same...
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    1987 50hp Evinrude E50TLCUD Thermostat Replacement

    Ok another question. A dumb question, but I'd rather ask a dumb question than waste a ton of time and money fixing the impeller. I wanted to flush the motor a little bit before putting it back together. When I crank the motor no water is coming out of the thermostat and relief valve holes. Does...
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    1987 50hp Evinrude E50TLCUD Thermostat Replacement

    Tomorrows the day, putting it all back together. Can I get some help with the thermostat seal? I'm not sure what side the flange should be on. Manual is not clear. I've found pictures and videos with it both ways.
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    So far so good

    I've had the same experience with my lithium starting battery*. It lasts days without needing to charge. Provides a steady current no matter if it's at 80% or 40%. Just flat. And I removed/disconnected the stator and rectifier so will never need to replace those parts. The only downside so far I...
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    1987 50hp Evinrude E50TLCUD Thermostat Replacement

    I may do that, I'm thinking it over. Just a matter of when, I want to get this back together and salvage the spring fishing season, and I also dont want to poke to hard at 40 years of buildup without doing a very thorough job. I see there is another plate I can remove on the side. Perhaps next...
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    1987 50hp Evinrude E50TLCUD Thermostat Replacement

    Ok I went ahead and ordered the parts anyway since the total wasn't that bad. [0323359] Screw (3) $4.44 [0315538] Cylinder Head Cover Gasket (1) $6.43 [0316132] Grommet (1) $11.23 [0310058] Thermostat Housing Seal (1) $3.5 [5005440] Thermostat Assembly (1) $24.08 Shipping...
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    1987 50hp Evinrude E50TLCUD Thermostat Replacement

    They are both almost exactly the same at 160 psi. Note - the last two times I checked it was not as high. Is this bad? Should I bother ordering the parts to fix the thermostat?
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    1987 50hp Evinrude E50TLCUD Thermostat Replacement

    Oh boy. Let me check the compression real quick. It did this immediately after drifting for about 5-10 minutes, and before that it was running normally.
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    1987 50hp Evinrude E50TLCUD Thermostat Replacement

    Would a stuck shut thermostat and relief value cause it to bog down and overheat?
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    1987 50hp Evinrude E50TLCUD Thermostat Replacement

    Inspected the thermostat and only thing I can conclude is that it was stuck closed and the pressure relief valve must have gotten stuck closed as well or clogged, leading it to overheat. I don't know how those correlate to it going into a sort of "limp mode" before this happened. I had it full...
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    How to disconnect temperature sensor?

    Thanks saltchuckmatt! That worked great. Glad I asked, it's a knife connector, not the bullet I expected:
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    Evinrude 7.5hp kill switch issue

    When I went through kill switch drama on my evinrude I made the mistake of buying a cheapo replacement from Amazon. Turns out even the slightest voltage leak will kill the motor, which of course the Amazon switch had. Cost me about two days of banging my head on the wall before I figured it out.
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    How to disconnect temperature sensor?

    Can I get some help on how to disconnect the temperature sensor wires? Do you just pull it apart, or have to bend or twist it or something?
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    1987 50hp Evinrude E50TLCUD Thermostat Replacement

    Got the last one out! Had it soaking in PB for about two days, plenty of light tapping with the hammer, and then I put some heat on it and came back a few hours later and it slowly came out. I'll take the head cover off tomorrow. I really hope to find the thermostat is indeed shot.
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    1987 50hp Evinrude E50TLCUD Thermostat Replacement

    All 14 bolts are turning except this middle one. I can see the head turning but springing back, which means it's not actually turning. I think I learned that from a Joe Reeves video. Got PB on it and now I wait.
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    1987 50hp Evinrude E50TLCUD Thermostat Replacement

    I believe so. If I recall correctly they were between 140 and 150 and +-10% of each other. I checked twice, when I first started working on it and after the last time it overheated. Disclaimer: crappy amazon tester used.
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