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  1. P

    Volvo Penta 5.7L alarm not working

    I believe the part that screws into the exhaust manifold is a temp or alarm sensor. I've unplugged and re plugged it in a couple times, so I don't think it would be a seating issue.
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    Volvo Penta 5.7L alarm not working

    yes - it has a four barrel Holly carburetor! do you mean the switch that plugs into the thermostat housing?
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    Volvo Penta 5.7L alarm not working

    yes, this engine has a 4 barrel Holly carborator! ahh....!
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    Volvo Penta 5.7L alarm not working

    what would the bubbles mean? air present? what should the max temp ever be on the manifolds/risers?
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    Volvo Penta 5.7L alarm not working

    risers and exhaust manifolds were definitely warm/almost hot to the touch during this time. good idea on using the IR temp gun on the thermostat! I'll test that next time I'm near the boat! it's a 140F thermostat - which is what's documented for this engine,
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    Volvo Penta 5.7L alarm not working

    that's a good suggestion on the alarm! I will check that with a meter. re; overheating, the impeller was replaced last year - summer 2024. with an infrared heat sensor, I recorded the right side exhaust manifold+riser at 114F and the left side exhaust manifold + riser at 124F degrees with...
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    Volvo Penta 5.7L alarm not working

    all of a sudden, the alarm in my Glastron GX205 Volvo Penta 5.7Lite V8 isn't working. It worked during spring ready but stopped working sometime in the early summer. any ideas what might be the cause? turn the key to accessory and no beep-beep-beep.... thoughts on this? It also seems...
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